Consulta: subjectFacets:"Cryptic species"
Registros recuperados: 38
Data/hora: 06/06/2024 04:33:44

Whole-genome duplication and hemoglobin differentiation traits between allopatric populations of Brazilian Odontophrynus americanus species complex (Amphibia, Anura)
Provedor de dados: 74
Autores: Cianciarullo,Aurora M.; Bonini-Domingos,Claudia R.; Vizotto,Luiz D.; Kobashi,Leonardo S.; Beçak,Maria-Luiza; Beçak,Willy.
Abstract Two allopatric populations of Brazilian diploid and tetraploid Odontophrynus americanus species complex, both from São Paulo state, had their blood hemoglobin biochemically analyzed. In addition, these specimens were cytogenetically characterized. Biochemical characterization of hemoglobin expression showed a distinct banding pattern between the allopatric specimens. Besides this, two distinct phenotypes, not linked to ploidy, sex, or age, were observed in adult animals of both populations. Phenotype A exhibits dark-colored body with small papillae, ogival-shaped jaw with reduced interpupillary distance and shorter hind limbs. Phenotype B shows yellowish-colored body with larger papillae, arch-shaped jaw with broader interpupillary distance and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anura; Cryptic species; Hemoglobin differentiation; Polyploidy; Whole-genome duplication.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000300436

Genetic evidence for a species complex within the piranha Serrasalmus maculatus (Characiformes, Serrasalmidae) from three Neotropical river basins based on mitochondrial DNA sequences
Provedor de dados: 74
Autores: Bignotto,Thaís Souto; Maniglia,Thiago Cintra; Gomes,Vivian Nunes; Oliveira,Isadora Janolio de; Agostinho,Carlos Sérgio; Prioli,Sônia Maria Alves Pinto; Prioli,Alberto José.
Abstract Mitochondrial molecular markers (DNA sequences of D-loop, cytochrome b and cytochrome c oxidase I) were employed to characterize populations of the piranha Serrasalmus maculatus from Upper Paraná, Upper Paraguay and Tocantins River basins. D-loop sequences of S. maculatus population from Paraná-Paraguay River basin exhibited tandem repeats of short motifs (12 base pairs) and variable numbers depending on specimens, accounting for length variation. Concatenated mitochondrial sequences suggested that S. maculatus encompasses different mitochondrial DNA lineages. Although sampling was restricted to three river basins, phylogenetic analysis clearly indicated that the species currently recognized as S. maculatus presents high genetic variability....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; Species delimitation; D-loop; Cytochrome b; Cytochrome c oxidase I.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572020000100801

Peripatric speciation drives diversification and distributional pattern of reef Hermit Crabs (Decapoda: Diogenidae: Calcinus)
Provedor de dados: 5
Autores: Malay, Maria Celia (machel) D.; Paulay, Gustav.
The diversity on coral reefs has long captivated observers. We examine the mechanisms of speciation, role of ecology in speciation, and patterns of species distribution in a typical reef-associated clade-the diverse and colorful Calcinus hermit crabs-to address the origin of tropical marine diversity. We sequenced COI, 16S, and H3 gene regions for similar to 90% of 56 putative species, including nine undescribed, "cryptic" taxa, and mapped their distributions. Speciation in Calcinus is largely peripatric at remote locations. Allopatric species pairs are younger than sympatric ones, and molecular clock analyses suggest that &gt; 2 million years are needed for secondary sympatry. Substantial niche conservatism is evident within clades, as well as a few major...
Tipo: Text
Palavras-chave: Allopatric speciation; Biodiversity; Biogeography; Color pattern evolution; Circumtropical speciation; Coral reef; Coral triangle; Cryptic species; Crustacea; ESU; Indo-Malayan hot spot; Molecular phylogenetics; Sympatric speciation.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00495/60623/64108.pdf

Larval size-distributions of Ariosoma balearicum cryptic species during the March–April season in the Sargasso Sea Subtropical Convergence Zone
Provedor de dados: 5
Autores: Miller, Michael J.; Marohn, Lasse; Wysujack, Klaus; Bonhommeau, Sylvain; Kuroki, Mari; Freese, Marko; Pohlmann, Jan-dag; Watanabe, Shun; Blancke, Tina; Weist, Peggy; Castonguay, Martin; Westerberg, Håkan; Tsukamoto, Katsumi; Hanel, Reinhold.
Leptocephali of the shallow-water congrid eel Ariosoma balearicum are abundant during February–April in the Sargasso Sea, and larval and adult meristic data indicates this species includes several regional subpopulations/cryptic species. Four multiple-transect larval surveys (2011, 2014, 2015, 2017) were used to examine the geographic size distribution of two myomere-count types of A. balearicum leptocephali. High-count (HC) larvae were consistently mostly between 80 and 100 mm in size (60–132 mm; 87.9 ± 6.8 mm) as observed previously, and frequently had narrow size ranges. The usually larger LC larvae (78–176 mm; 111.4 ± 26.7 mm) were more abundant in western or central areas. HC larvae tended to decrease in size from west to east and increase from south...
Tipo: Text
Palavras-chave: Ariosoma balearicum; Leptocephali; Larval dispersal; Sargasso Sea; Subtropical gyre; Cryptic species.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62028/66491.pdf

Cryptic species of Archinome (Annelida: Amphinomida) from vents and seeps
Provedor de dados: 5
Autores: Borda, Elizabeth; Kudenov, Jerry D.; Chevaldonne, Pierre; Blake, James A.; Desbruyeres, Damien; Fabri, Marie-claire; Hourdez, Stephane; Pleijel, Fredrik; Shank, Timothy M.; Wilson, Nerida G.; Schulze, Anja; Rouse, Greg W.
Since its description from the Galapagos Rift in the mid-1980s, Archinome rosacea has been recorded at hydrothermal vents in the Pacific, Atlantic and Indian Oceans. Only recently was a second species described from the Pacific Antarctic Ridge. We inferred the identities and evolutionary relationships of Archinome representatives sampled from across the hydrothermal vent range of the genus, which is now extended to cold methane seeps. Species delimitation using mitochondrial cytochrome c oxidase subunit I (COI) recovered up to six lineages, whereas concatenated datasets (COI, 16S, 28S and ITS1) supported only four or five of these as clades. Morphological approaches alone were inconclusive to verify the identities of species owing to the lack of discrete...
Tipo: Text
Palavras-chave: Deep sea; Hydrothermal vents; Cold methane seeps; Cryptic species; Polychaete.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26814/24961.pdf

Genetic data, reproduction season and reproductive strategy data support the existence of biological species in Ophioderma longicauda
Provedor de dados: 5
Autores: Weber, Alexandra Anh-thu; Stohr, Sabine; Chenuil, Anne.
Cryptic species are numerous in the marine environment. The brittle star Ophioderma longicauda is composed of six mitochondrial lineages, encompassing brooders, which form a monophyletic group, and broadcasters, from which the brooders are derived. To clarify the species limits within O. longicauda, we compared the reproductive status of the sympatric lineages L1 and L3 (defined after sequencing a portion of the mitochondrial gene COI) during the month of May in Greece. In addition, we genotyped a nuclear marker, intron i51. Each L3 female was brooding, whereas all L1 specimens displayed full gonads, suggesting temporal pre-zygotic isolation between brooders and broadcasters. Statistical differences were found among lineages in morphology and bathymetric...
Tipo: Text
Palavras-chave: Ophiuroidea; Espèces cryptiques; Espèce incubante; Sous-unité I de la cytochrome oxydase; EPIC; Ophiuroidea; Cryptic species; Brooding species; Cytochrome oxidase subunit I; EPIC.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00372/48271/48576.pdf

From seascape ecology to population genomics and back. Spatial and ecological differentiation among cryptic species of the red algae Lithophyllum stictiforme/L. cabiochiae, main bioconstructors of coralligenous habitats
Provedor de dados: 5
Autores: De Jode, Aurélien; David, Romain; Haguenauer, Anne; Cahill, Abigail E.; Erga, Zinovia; Guillemain, Dorian; Sartoretto, Stephane; Rocher, Caroline; Selva, Marjorie; Le Gall, Line; Féral, Jean-pierre; Chenuil, Anne.
Ecosystem engineering species alter the physical structure of their environment and can create or modify habitats, having a massive impact on local biodiversity. Coralligenous reefs are highly diverse habitats endemic to the Mediterranean Sea built by calcareous benthic organisms among which Crustose Coralline Algae are the main engineering species. We analyzed the diversity of Lithophyllum stictiforme or L. cabiochiae in coralligenous habitats combining a multiple barcode and a population genomics approach with seascape features. Population genomics allowed disentangling pure spatial effects from environmental effects. We found that these taxa form a complex of eight highly divergent cryptic species that are easily identifiable using classic barcode...
Tipo: Text
Palavras-chave: Engineering species; Cryptic species; Ecological niche; Coralligenous habitats; Ecological differentiation; Crustose Coralline Algae.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59859/63014.pdf

Diversity, Distribution and Phylogeny of Hesionidae (Annelida) Colonizing Whale Falls: New Species of Sirsoe and Connections Between Ocean Basins
Provedor de dados: 5
Autores: Shimabukuro, Mauricio; Carrerette, Orlemir; Alfaro-lucas, Joan Manel; Rizzo, Alexandra Elaine; Halanych, Kenneth M.; Sumida, Paulo Yukio Gomes.
Whale falls are important environments contributing to biodiversity, connectivity and evolutionary novelty in deep-sea ecosystem. Notwithstanding, most of this knowledge is based in studies from NE Pacific basin. Interestingly, the only known natural whale fall on the SW Atlantic has faunal composition affinities with carcasses from other deep-ocean basins. In this carcass, annelid worms belonging to Hesionidae are abundant and species-rich, and include some shared species with NE Pacific Ocean. Here we evaluate the diversity of Hesionidae on the SW Atlantic using new information of implanted whale bones and explore whether some species have interbasin distribution or if they represent cryptic species in different basins. We described, using morphological...
Tipo: Text
Palavras-chave: Deep sea; Biodiversity; Cryptic species; Biogeography; Connectivity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00509/62081/66263.pdf

Easier detection of invertebrate "identification-key characters" with light of different wavelengths
Provedor de dados: 5
Autores: Koken, Marcel; Grall, Jacques.
The marine alpha-taxonomist often encounters two problems. Firstly, the "environmental dirt" that is frequently present on the specimens and secondly the difficulty in distinguishing key-features due to the uniform colours which fixed animals often adopt. Here we show that illuminating animals with deep-blue or ultraviolet light instead of the normal white-light abrogates both difficulties; dirt disappears and important details become clearly visible. This light regime has also two other advantages. It allows easy detection of very small, normally invisible, animals (0.1 mu m range). And as these light wavelengths can induce fluorescence, new identification markers may be discovered by this approach.
Tipo: Text
Palavras-chave: Fluorescent colours; Light emission; Determination; Cryptic species; Dimorphism; Pattern UV light; Deep-blue light; Autofluorescence.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00185/29660/28026.pdf

Sharp genetic break between Atlantic and English Channel populations of the polychaete Pectinaria koreni, along the North coast of France
Provedor de dados: 5
Autores: Jolly, Mt; Jollivet, D; Gentil, F; Thiebaut, E; Viard, F.
This study uses enzymatic and mitochondrial genes to infer the relative importance of historical processes and contemporary hydrodynamic features on the observed patterns of genetic structure in subdivided populations of Pectinaria koreni (Polychaeta: Pectinariidae) along the coasts of Brittany and the English Channel. Nucleotide sequence variation of a 603-bp fragment of the mtDNA cytochrome oxidase subunit I gene revealed a surprisingly deep phylogeographic break of about 16% divergence separating the Brittany and Channel populations, which coincides with a biogeographic boundary along the western coast of Brittany. Deep sequence divergence with fixed haplotype differences and the inversion of allele frequencies at two enzyme loci suggests the occurrence...
Tipo: Text
Palavras-chave: Phylogeography; Allozymes; MtDNA; Parapatric boundary; Cryptic species.
Ano: 2005
URL: https://archimer.ifremer.fr/doc/00301/41250/40433.pdf

Nomenclature for the Nameless: A Proposal for an Integrative Molecular Taxonomy of Cryptic Diversity Exemplified by Planktonic Foraminifera
Provedor de dados: 5
Autores: Morard, Raphael; Escarguel, Gilles; Weiner, Agnes K. M.; Andre, Aurore; Douady, Christophe J.; Wade, Christopher M.; Darling, Kate F.; Ujiie, Yurika; Seears, Heidi A.; Quillevere, Frederic; De Garidel-thoron, Thibault; De Vargas, Colomban; Kucera, Michal.
Investigations of biodiversity, biogeography, and ecological processes rely on the identification of "species" as biologically significant, natural units of evolution. In this context, morphotaxonomy only provides an adequate level of resolution if reproductive isolation matches morphological divergence. In many groups of organisms, morphologically defined species often disguise considerable genetic diversity, which may be indicative of the existence of cryptic species. The diversity hidden by morphological species can be disentangled through genetic surveys, which also provide access to data on the ecological distribution of genetically circumscribed units. These units can be identified by unique DNA sequence motifs and allow studies of evolutionary and...
Tipo: Text
Palavras-chave: Cryptic species; Genetic diversity; Planktonic foraminifera; Molecular nomenclature; MOTUs.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00383/49408/49900.pdf

Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches
Provedor de dados: 5
Autores: Luo, Zhaohe; Yang, Weidong; Leaw, Chui Pin; Pospelova, Vera; Bilien, Gwenael; Liow, Guat Ru; Lim, Po Teen; Gu, Haifeng.
Blooms of the harmful dinoflagellate Akashiwo sanguinea are responsible for the mass mortality of fish and invertebrates in coastal waters. This cosmopolitan species includes several genetically differentiated clades. Four clonal cultures were established by isolating single cells from Xiamen Harbour (the East China Sea) for morphological and genetic analyses. The cultures displayed identical morphology but were genetically different, thus revealing presence of cryptic diversity in the study area. New details of the apical structure complex of Akashiwo sanguinea were also found. To investigate whether the observed cryptic diversity was related to environmental differentiation, 634 cells were obtained from seasonal water samples collected from 2008 to 2012....
Tipo: Text
Palavras-chave: Biogeography; Cryptic species; Gymnodinium sanguineum; Seasonal occurrence; Speciation.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00386/49771/50355.pdf

Metazoan meiofaunal communities at cold seeps along the Norwegian margin: Influence of habitat heterogeneity and evidence for connection with shallow-water habitats
Provedor de dados: 5
Autores: Van Gaever, Saskia; Olu, Karine; Derycke, Sofie; Vanreusel, Ann.
Cold-seep environments and their associated symbiont-bearing megafaunal communities create islands of primary production for macro- and meiofauna in the otherwise monotonous and nutrient-poor deep-sea environment. To examine the spatial variation and distribution patterns of metazoan meiobenthos in different seepage-related habitats, samples were collected in two regions off Norway: several pockmarks associated with the Storegga Slide including the Nyegga pockmark area (730 m: 64 degrees N), and the active, methane-venting Hakon Mosby Mud Volcano (HMMV) west of the Barents Sea (1280 m: 72 degrees N). Based on sediment geochemistry and associated epifauna, three different habitat types were distinguished across the two regions: (1) reduced sediment with...
Tipo: Text
Palavras-chave: Terschellingia longicaudata; Halomonhystera disjuncta; Cryptic species; Nematodes; Meiobenthos; Cold seeps.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7484.pdf

Epitypification of Fusarium oxysporum – clearing the taxonomic chaos
Provedor de dados: 16
Autores: Lombard, L.; Sandoval-Denis, M.; Lamprecht, S.C.; Crous, P.W.
Fusarium oxysporum is the most economically important and commonly encountered species of Fusarium. This soil-borne fungus is known to harbour both pathogenic (plant, animal and human) and non-pathogenic strains. However, in its current concept F. oxysporum is a species complex consisting of numerous cryptic species. Identification and naming these cryptic species is complicated by multiple subspecific classification systems and the lack of living ex-type material to serve as basic reference point for phylogenetic inference. Therefore, to advance and stabilise the taxonomic position of F. oxysporum as a species and allow naming of the multiple cryptic species recognised in this species complex, an epitype is designated for F. oxysporum. Using multi-locus...
Tipo: Article / Letter to the editor
Palavras-chave: Cryptic species; Diversity; Human and plant pathogens; Species complex; Subspecific classification.
Ano: 2019
URL: http://www.repository.naturalis.nl/record/673170

Alpheus rudolphi spec. nov., a new snapping shrimp from northeastern Brazil (Crustacea: Decapoda: Alpheidae)
Provedor de dados: 16
Autores: Almeida, A.O.; Anker, A.
A new snapping shrimp of the Alpheus armatus Rathbun, 1901 species complex, Alpheus rudolphi spec. nov., is described based on a single female holotype collected off Alagoas, northeastern Brazil (09°55.11’S 35°32.73’W). The new species differs from all other species of the A. armatus complex by the unique configuration of the orbito-rostral region of the carapace.
Tipo: Article / Letter to the editor
Palavras-chave: Caridea; Alpheidae; Alpheus; Cryptic species; Snapping shrimp; West Atlantic; Alagoas; Brazil; 42.74.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/376598

Searching for cryptic species in Erpobdella octoculata (L.) (Hirudinea: Clitellata): discordance between the results of genetic analysis and cross-breeding experiments
Provedor de dados: 16
Autores: Koperski, P.; Milanowski, R.; Krzyk, A.
The main aim of this study was to reveal reproduction barriers and potentially cryptic radiation within the very common and morphologically variable leech species - Erpobdella octoculata (L., 1758). The differences in reproductive success of the morphological forms were compared experimentally. The data based on the results of field sampling and analysis of ITS and COI sequences is also presented. The results of the analysis of DNA sequences clearly show lack of reproduction barriers between the analysed morphological forms. Subtle differences in DNA sequences between individuals, found with the use of the arbitrary primers method, seem to be related mainly to geographical distance between sub-populations. On the basis of these results, E. octoculata...
Tipo: Article / Letter to the editor
Palavras-chave: COI; Cryptic species; Discordance; Hirudinea; ITS; Molecular taxonomy; 42.76.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/369712

Host relations and DNA reveal a cryptic gall crab species (Crustacea: Decapoda: Cryptochiridae) associated with mushroom corals (Scleractinia: Fungiidae)
Provedor de dados: 16
Autores: Meij, S.E.T. van der.
Mushroom corals of the Indo-West Pacific Fungiidae (Scleractinia) provide habitats for a rich associated fauna, including three species of gall crabs (Cryptochiridae). During the course of the present study gall crabs were sampled from many different fungiid hosts. Based on this ‘reversed’ approach - by studying coral symbionts from a host perspective - a previously unnoticed host specificity pattern was detected. The sampling of gall crab fauna per host coral combined with molecular analyses of H3 nDNA, 16S and COI mtDNA revealed a cryptic gall crab species closely related to Fungicola fagei. This new species, described hereafter as Fungicola syzygia sp. nov., is predominantly associated with the mushroom coral genera Cycloseris and Pleuractis, whereas...
Tipo: Article / Letter to the editor
Palavras-chave: Cryptic species; Fungicola; Host specificity; Indo-West Pacific region; Tropical Eastern Pacific region; Scleractinia; 42.74.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/519714

DNA barcoding, phylogeny and systematics of Golden-backed frogs (Hylarana, Ranidae) of the Western Ghats-Sri Lanka biodiversity hotspot, with the description of seven new species
Provedor de dados: 16
Autores: Biju, S.D.; Garg, S.; Mahony, S.; Wijayathilaka, N.; Senevirathne, G.; Meegaskumbura, M.
A systematic revision of the genus Hylarana in the Western Ghats-Sri Lanka biodiversity hotspot is presented. Species delineation in Hylarana is complicated due to a lack of distinct colour differences or striking morphological characters, leading to potential misidentification. We conducted extensive surveys throughout the Western Ghats-Sri Lanka biodiversity hotspot and performed multiple gene (16S, COI and Cytb) barcoding using 103 samples collected from cultivated land and natural habitats. Genetic distance comparisons and Neighbor Joining trees indicated the presence of at least 14 candidate species in the region, supported by taxa groupings for all three genetic markers. Utilising a combination of molecular and morphological data, we describe seven...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibia; Cryptic species; Endemism; Integrative taxonomy; Lectotypification; Multiple gene barcoding; Neotypification; Taxonomic revision; 42.82; 42.64.
Ano: 2014
URL: http://www.repository.naturalis.nl/record/506456

Macrozooplankton diversity: how much do we really know?
Provedor de dados: 16
Autores: Pierrot-Bults, A.C.; Spoel, S. van der.
Pelagic species are widely distributed in a horizontal plane and have three-dimensional distributions, since the sea covers about 70% of the surface of the earth, and on average 4 km deep. For most macrozooplankton and micronekton groups there seems to be no great expectations of finding new taxa with the exception of gelatinous groups and of the deep sea, which is a relatively unknown especially in the benthopelagic zone close to the sea-bed. However, we do not know very much about variation, either morphological or genetical, within socalled species in different parts of their range. We think we are dealing with single very broadly distributed species, which, in reality, are species complexes consisting of several more or less cryptic species or...
Tipo: Article / Letter to the editor
Palavras-chave: Pelagic macrozooplankton/micronekton diversity; Biogeographic patterns; Genetic variation; Morphological variation; Cryptic species; 42.79.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/220316

Evolutionary history of the sequestrate genus Rossbeevera (Boletaceae) reveals a new genus Turmalinea and highlights the utility of ITS minisatellite-like insertions for molecular identification
Provedor de dados: 16
Autores: Orihara, T.; Lebel, T.; Ge, Z.-W.; Smith, M.E.; Maekawa, N.
The sequestrate (truffle-like) basidiomycete genera Rossbeevera, Chamonixia, and Octaviania are closely related to the epigeous mushroom genera Leccinum and Leccinellum. In order to elucidate the properties and placement of several undescribed sequestrate taxa in the group and to reveal the evolutionary history of Rossbeevera and its allies, we conducted phylogenetic analyses based on three nuclear (ITS, nLSU, EF-1α) and two mitochondrial DNA loci (ATP6 and mtSSU) as well as precise morphological observations. Phylogenetic analyses of three nuclear loci suggest a complex evolutionary history with sequestrate fruiting bodies present in several clades, including a previously unrecognized sister clade to Rossbeevera. Here we propose a new sequestrate genus,...
Tipo: Article / Letter to the editor
Palavras-chave: Biogeography; Cryptic species; DNA barcoding; Hypogeous fungi; Introgression; Species tree.
Ano: 2016
URL: http://www.repository.naturalis.nl/record/611857

Diversity of gall-forming rusts (Uromycladium, Pucciniales) on Acacia in Australia
Provedor de dados: 16
Autores: Doungsa-ard, C.; McTaggart, A.R.; Geering, A.D.W.; Shivas, R.G.
Uromycladium tepperianum has been reported on over 100 species of Acacia, as well as on the closely related plant genera, Falcataria, Racosperma and Paraserianthes. Previous studies have indicated that U. tepperianum may represent a complex of host-specific, cryptic species. The phylogenetic relationships between 79 specimens of Uromycladium were determined based on a concatenated dataset of the Small Subunit, the Internal Transcribed Spacer and the Large Subunit regions of nuclear ribosomal DNA, and the mitochondrial cytochrome c oxidase subunit 3. This study showed that the host range of U. tepperianum s.str. was restricted to species of Acacia in the ‘A. bivenosa group’ sensu Chapman &amp; Maslin (1992). An epitype of U. tepperianum on A. ligulata is...
Tipo: Article / Letter to the editor
Palavras-chave: Cryptic species; Pucciniales; Systematics; Taxonomy; 16 new taxa.
Ano: 2018
URL: http://www.repository.naturalis.nl/record/650131

Taxonomy of Tricholoma in northern Europe based on ITS sequence data and morphological characters
Provedor de dados: 16
Autores: Heilmann-Clausen, J.; Christensen, M.; Frøslev, T.G.; Kjøller, R.
Based on molecular and morphological data we investigated the taxonomy and phylogeny of the ectomycorrhizal genus Tricholoma in northern Europe. Our phylogenetic tree confirmed the presence of at least 72 well circumscribed species within the region. Of these, three species, viz. T. boreosulphurescens, T. bryogenum and T. ilkkae are described as new to science, based on morphological, distributional, ecological and molecular data. Several other terminal branches represent putative cryptic taxa nested within classical species or species groups. Molecular type studies and/or designation of sequenced neotypes are needed in these groups, before the taxonomy can be settled. In general our phylogenetic analysis supported previous suprageneric classification...
Tipo: Article / Letter to the editor
Palavras-chave: Agarics; Biogeography; Cryptic species; Ectomycorrhizal fungi; Host selection; Morphological traits; Phylogeny; Tricholomataceae.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/614530

Diversity and systematics of the sequestrate genus Octaviania in Japan: two new subgenera and eleven new species
Provedor de dados: 16
Autores: Orihara, T.; Smith, M.E.; Shimomura, N.; Iwase, K.; Maekawa, N.
The sequestrate fungi of Japan, including truffle and truffle-like fungi, have not been well characterized but are potentially diverse. We investigated the diversity and phylogeny of Japanese Octaviania specimens using a multifaceted approach including scanning and transmission electron microscopy as well as analysis of nuclear ribosomal DNA (ITS and LSU) and EF-1α (tef1) sequences. Phylogenetic analyses indicate that the genus Octaviania is divided into three major clades, and that there are at least 12 species-level lineages in Japan. Accordingly, we describe two new subgenera, Parcaea and Fulvoglobus, and eleven new species. Subgenus Parcaea accommodates four highly divergent, but macromorphologically almost indiscernible cryptic species. We discuss not...
Tipo: Article / Letter to the editor
Palavras-chave: Biogeography; Boletaceae; Cryptic species; Hypogeous fungi; Phylogeny; Taxonomy.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/531994

Evaluating methodologies for species delimitation: the mismatch between phenotypes and genotypes in lichenized fungi (Bryoria sect. Implexae, Parmeliaceae)
Provedor de dados: 16
Autores: Boluda, C.G.; Rico, V.J.; Divakar, P.K.; Nadyeina, O.; Myllys, L.; McMullin, R.T.; Zamora, J.C.; Scheidegger, C.; Hawksworth, D.L.
In many lichen-forming fungi, molecular phylogenetic analyses lead to the discovery of cryptic species within traditional morphospecies. However, in some cases, molecular sequence data also questions the separation of phenotypically characterised species. Here we apply an integrative taxonomy approach ‒ including morphological, chemical, molecular, and distributional characters ‒ to re-assess species boundaries in a traditionally speciose group of hair lichens, Bryoria sect. Implexae. We sampled multilocus sequence and microsatellite data from 142 specimens from a broad intercontinental distribution. Molecular data included DNA sequences of the standard fungal markers ITS, IGS, GAPDH, two newly tested loci (FRBi15 and FRBi16), and SSR frequencies from 18...
Tipo: Article / Letter to the editor
Palavras-chave: Chemotypes; Cryptic species; Haplotypes; Incomplete lineage sorting; Integrative taxonomy; Microsatellites; Speciation; Species concepts.
Ano: 2019
URL: http://www.repository.naturalis.nl/record/660277

Barcoding lepidoptera: current situation and perspectives on the usefulness of a contentious technique
Provedor de dados: 82
Autores: Silva-Brandão,Karina L; Lyra,Mariana L; Freitas,André V L.
Faced by a growing need of identification and delimitation of new and established cryptic species that are being lost at an increasing rate, taxonomists can now more than ever take advantage of an enormous variety of new molecular and computational tools. At this moment they should be open to all new available technologies in the so called "technology-driven revolution" in systematics. The use of the "DNA barcode" has been discussed by those applying successfully this approach to identify and diagnose species and by those who believe that the flaws in the use of this molecular marker are as many as to negate the worth of its employment. For insects of the order Lepidoptera neither side seems totally correct orwrong, and although many groups of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Cryptic species; DNA barcode; Systematics; Taxonomy.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000400001

Contributions to the taxonomy of Trachelyopterus (Siluriformes): comparative cytogenetic analysis in three species of Auchenipteridae
Provedor de dados: 83
Autores: Santos,Dayane Petik dos; Felicetti,Denise; Baumgärtner,Lucas; Margarido,Vladimir Pavan; Blanco,Daniel Rodrigues; Moreira-Filho,Orlando; Lui,Roberto Laridondo.
ABSTRACT Auchenipteridae is divided into subfamilies Centromochlinae and Auchenipterinae. Parauchenipterus is included in the latter and is subject of taxonomic discussions concerning its validation or synonymization with Trachelyopterus. Herein, three species from two hydrographic basins were cytogenetically analyzed: Parauchenipterus striatulus from Doce River and two sympatric species, P. galeatus and Trachelyopterus coriaceus, from the Araguaia River. Diploid number of 58 chromosomes was verified for all species, but P. striatulus has different karyotype formula from the others. The three species have heterochromatin located in terminal regions of almost all chromosomes and in pericentromeric region on acrocentric chromosomes. Simple NORs was verified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; FISH; Parauchenipterus; Problematic taxonomy; 5S rDNA.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100214

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)
Provedor de dados: 83
Autores: Artoni,Roberto Ferreira; Shibatta,Oscar Akio; Gross,Maria Claudia; Schneider,Carlos Henrique; Almeida,Mara Cristina de; Vicari,Marcelo Ricardo; Bertollo,Luiz Antonio Carlos.
Four populations of Astyanax aff. fasciatus of the upper rio Tibagi (municipal district of Ponta Grossa, Paraná State, Brazil), had their karyotypes and morphometry analyzed. The cytogenetic data show the occurrence of distinct karyotypes (cytotypes), here named cytotype A, with 2n=48 chromosomes (6m+18sm+14st+10a), cytotype B, with 2n=50 chromosomes (8m+18sm+14st+10a) and cytotype C, with 2n=50 chromosomes (8m+18sm+14st+10a). The distribution pattern of the constitutive heterochromatin was very similar between cytotypes A and B, but diverged in relation to cytotype C. Distinct cytotypes may occur in sympatry in the upper rio Tibagi region, with the exception of the Furna 2 sample, which presents cytotype A exclusively. In addition, a specimen with 2n=49...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tetra; Morphometrics; Karyotype; Sympatry; Cryptic species.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200005

Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin
Provedor de dados: 83
Autores: Teixeira,Thais K. S. S.; Venere,Paulo C.; Ferreira,Daniela C.; Mariotto,Sandra; Castro,Jonathan P.; Artoni,Roberto F.; Centofante,Liano.
ABSTRACT Astyanax is one of the most abundant and diverse taxa of fishes in the Neotropical region. In order to increase the amount of cytogenetic information for Astyanax as well as to exhibit data to subsidize future taxonomic studies, this work analyzed three species of Astyanax: two species are cryptic, and are here reported to live in syntopy (A. abramis and A. lacustris); the first karyotype description for A. pirapuan is also presented. Cytogenetic analyzes reveal a diploid number of 2n=50 chromosomes for three species, yet with differences in their karyotype morphology. The physical mapping of 18S rDNA showed up to thirteen sites in A. pirapuan and two in A. abramis and A. lacustris. The physical mapping of 5S rDNA has proven to be an effective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; Fish; Karyotype; Species complex.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100214

A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina
Provedor de dados: 83
Autores: Terán,Guillermo E.; Butí,Cristina I.; Mirande,J. Marcos.
ABSTRACT A new species of Astyanax is described from the arheic system of Río Sucuma, in Catamarca, Northwestern Argentina. The new species is distinguished from its congeners by a combination of characters including the presence of a broad vertical humeral spot, absence of maxillary teeth, and absence of circuli in posterior field of scales. Furthermore, this species is distinguished by the orbital diameter, head length, branched anal-fin rays, perforated lateral-line scales, transverse scales, dentary teeth with abrupt decrease in size. This species is, to date, the single known fish endemic of Río Sucuma basin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arheic system; Characiformes; Cryptic species; Endemic species; Phylogeny.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200209

Integrative taxonomy reveals a new species of pacu (Characiformes: Serrasalmidae: Myloplus) from the Brazilian Amazon
Provedor de dados: 83
Autores: Ota,Rafaela Priscila; Machado,Valéria Nogueira; Andrade,Marcelo C.; Collins,Rupert A.; Farias,Izeni Pires; Hrbek,Tomas.
ABSTRACT Pacus of the genus Myloplus represent a formidable taxonomic challenge, and particularly so for the case of M. asterias and M. rubripinnis, two widespread and common species that harbor considerable morphological diversity. Here we apply DNA barcoding and multiple species discovery methods to find candidate species in this complex group. We report on one well-supported lineage that is also morphologically and ecologically distinct. This lineage represents a new species that can be distinguished from congeners by the presence of dark chromatophores on lateral-line scales, which gives the appearance of a black lateral line. It can be further diagnosed by having 25-29 branched dorsal-fin rays (vs. 18-24), 89-114 perforated scales from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: COI gene; Cryptic species; Myloplus asterias; Myloplus rubripinnis; Neotropical.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100214

Causative Agents of Aspergillosis Including Cryptic Aspergillus Species and A. fumigatus
Provedor de dados: 19
Autores: 豊留, 孝仁; TOYOTOME, Takahito.
アスペルギルス症は深在性真菌感染症の重要な位置を占めている．アスペルギルス症の原因真菌はAspergillus fumigatusが最も重要であるが，そのほかにもAspergillus flavusやAspergillus niger, Aspergillus terreusなども重要な原因菌種である．また，近年になって隠蔽種と呼ばれる各Aspergillus sectionの代表的な種に非常によく似た菌種の存在が認識され，一部のアスペルギルス症の原因となっていることも分かってきた．最近の研究で，それらの菌種間では抗真菌薬に対する感受性や二次代謝産物の産生プロファイル (エクソメタボローム) が異なることも明らかとなってきた．一方，治療中のA. fumigatusアゾール耐性化や近年の欧州を中心とした環境中アゾール耐性A. fumigatusの出現も報告され，これら菌種を正確に同定し，加えて感受性を評価することの重要性が高まってきている． 本総説ではA. fumigatusを含めたアスペルギルス症原因菌種，特に隠蔽種について触れ，エクソメタボローム解析を利用した同定の可能性を述べる．加えて，A. fumigatusアゾール系抗真菌薬耐性について最近の報告を交えて概説したい
Palavras-chave: Aspergillosis; Aspergillus spp.; Azole resistance; Cryptic species; Secondary metabolites.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4396

A new species of Neotropical freshwater stingray of the genus Potamotrygon Garman, 1877 from the Río Madrede Díos, Peru (Chondrichthyes: Potamotrygonidae)
Provedor de dados: 84
Autores: Silva,João Paulo C.B. da; Carvalho,Marcelo R. de.
Potamotrygon tatianae sp. nov., is described from Río Madre de Díos, Peru, upper Rio Madeira basin. The new species is distinguished from all congeners by a unique combination of characters, including its dorsal color pattern formed by a relatively slender, highly convoluted, beige to dark brown vermicular pattern, a single row of dorsal tail spines, and a relatively longer tail posterior to caudal stings. Potamotrygon tatianae sp. nov., occurs sympatrically with other species of Potamotrygon (P. falkneri, P. orbignyi and P. motoro). From the similar species P. falkneri, P. tatianae sp. nov., is further distinguished by the absence of circular, reniform, and oval spots, by its proportionally much longer tail, by having dorsal tail spines in one irregular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Potamotrygon tatianae sp. nov.; Potamotrygon falkneri; Taxonomy; Morphology; Cryptic species; Río Madeira; South America.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492011000800001

Can sibling species of the Drosophila willistoni subgroup be recognized through combined microscopy techniques?
Provedor de dados: 92
Autores: Zanini,Rebeca; Deprá,Maríndia; Valente,Vera Lúcia da Silva.
ABSTRACT In several arthropod groups, male genitalia is the most important feature for species identification, especially in cryptic species. Cryptic species are very common in the Drosophila genus, and the Neotropical Drosophila willistoni species group is a good example. This group currently includes 24 species divided into three subgroups: alagitans, bocainensis and willistoni. There are six sibling species in the willistoni subgroup – D. willistoni, D. insularis, D. tropicalis, D. equinoxialis, D. pavlovskiana and D. paulistorum, which is a species complex composed of six semispecies – Amazonian, Andean-Brazilian, Centroamerican, Interior, Orinocan and Transitional. The objective of this study was to characterize male genitalia of the willistoni...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; Drosophila willistoni subgroup; Drosophila paulistorum complex; Male genitalia; Semispecies.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000400323

Morphology and 18S rDNA gene sequence of Spirostomum minus and Spirostomum teres (Ciliophora: Heterotrichea) from Rio de Janeiro, Brazil
Provedor de dados: 103
Autores: Fernandes,Noemi M.; Silva Neto,Inácio D. da.
Species of Spirostomum Ehrenberg, 1838 are widely used as model organisms in ecological studies of environmental impacts and symbioses between ciliates and human pathogenic bacteria. However, the taxonomy of this genus is confused by the superficiality of the morphological descriptions of its included species, and the use of only a few characters for their differentiation. The present study provides details of total infraciliature, nuclear apparatus, morphometric data and 18S rDNA gene sequences of Spirostomum teres Claparède &amp;amp; Lachmann, 1858 and Spirostomum minus Roux, 1901, isolated from a sewage treatment plant and a freshwater lake in the city of Rio de Janeiro, Brazil, respectively. For the morphological descriptions of S. teres and S. minus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioindicators; Ciliates; Cryptic species; Heterotrichs; Morphology.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000100009

Non invasive methods for genetic analysis applied to ecological and behavioral studies in Latino-America
Provedor de dados: 96
Autores: González,Susana; Duarte,José Mauricio Barbanti.
Documenting the presence and abundance of the neotropical mammals is the first step for understanding their population ecology, behavior and genetic dynamics in designing conservation plans. The combination of field research with molecular genetics techniques are new tools that provide valuable biological information avoiding the disturbance in the ecosystems, trying to minimize the human impact in the process to gather biological information. The objective of this paper is to review the available non invasive sampling techniques that have been used in Neotropical mammal studies to apply to determine the presence and abundance, population structure, sex ratio, taxonomic diagnostic using mitochondrial markers, and assessing genetic variability using nuclear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; Fecal DNA; Non invasive sampling.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982007001000011

The marine brooder Excirolana braziliensis (Crustacea: Isopoda) is also a complex of cryptic species on the coast of Chile
Provedor de dados: 97
Autores: VARELA,ANDREA I; HAYE,PILAR A.
Speciation is a direct consequence of isolated populations in taxa with low dispersal potential. The brooding crustacean Excirolana braziliensis, with a presumably wide geographic range of distribution (~16° N-41° S in the Pacific and ~19° N-35° S in the Atlantic), has been detected to correspond to cryptic species on the coast of Panama. Latitudinal variations in reproductive features in E. braziliensis have been attributed to phenotypic plasticity, however, the differences may be the result of divergent populations. Considering that the taxon has been reported to be a complex of cryptic species in other geographic areas and given the phenotypic differences detected along its distribution range, we hypothesized that E. braziliensis is a complex of species...
Tipo: Journal article
Palavras-chave: Cryptic species; Genetic differentiation; Genetic distance; Marine peracarids; Phylogenetics.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400011

The genital atrium armature of some Brazilian sand fly females (Diptera: Phlebotominae)
Provedor de dados: 36
Autores: FARIAS,Emanuelle de Sousa; ALENCAR,Ronildo Baiatone; JUSTINIANO,Sílvia Brandão; FREITAS,Rui Alves de; COELHO,Luiz de Souza; RIOS-VELÁSQUEZ,Claudia María; PESSOA,Felipe Arley Costa.
Phlebotomine sand flies are insects of medical importance. Species in the Neotropical region are highly diverse. Some of these species are considered cryptic species because of their morphological similarity between adult females of different species make identification especially difficult. The aim of this study was to analyze and describe the armature in the genital atrium (AGA) of some adult female sand flies, in order to discover new taxonomic characters that make it possible to distinguish between species that would otherwise be treated as cryptic by analysis of the AGA. The AGA of 16 Phlebotomine sand fly species are described. Distinct differences were found in relation to the shape and size of the armature, the presence or absence of spines on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptic species; Taxonomy; Morphology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000100081

Karyotype description of possible new species of the Hypostomus ancistroides complex (Teleostei: Loricariidae) and other Hypostominae - doi: 10.4025/actascibiolsci.v34i2.9318
Provedor de dados: 3
Autores: Endo, Kátia Sayuri; Universidade Estadual de Maringá; Martinez, Emanuel Ricardo Monteiro; Universidade Estadual Paulista “Júlio de Mesquita Filho" / Botucatu-SP; Zawadzki, Claudio Henrique; Universidade Estadual de Maringa; Paiva, Luiz Ricardo de Souza; Universidade Estadual Paulista “Júlio de Mesquita Filho" / Botucatu-SP; Júlio Júnior, Horácio Ferreira; Universidade Estadual de Maringá.
Cytogenetic analyses were performed in four species of the Hypostominae subfamily, three from Hypostomus (Hypostomini) genus and Rhinelepis aspera (Rhinelepini). Three populations of Hypostomus ancistroides were analyzed, which had 2n=68 chromosomes, but presented different karyotype formulas. Hypostomus regani and H. strigaticeps, both from Ivaí river, showed 2n=72 chromosomes with two distinct cytotypes. In turn, R. aspera of the upper Paraná river basin presented 2n=54 chromosome. Multiple Nucleolar Organizer Regions (NORs) have been evidenced by silver nitrate staining in species of Hypostomus and single NOR in R. aspera. The observed variation in the chromosome number and the marked variability in karyotype formulas and NORs reveal a certain amount of...
Tipo: Estudos cromossômicos
Palavras-chave: 2.02.04.00-0 chromosomal evolution; Cryptic species; Neotropical fishes; NOR Genética Animal.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9318