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Registros recuperados: 32
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A new species of Astyanax (Ostariophysi: Characidae) from the headwaters of the arheic Río Sucuma, Catamarca, Northwestern Argentina Neotropical Ichthyology
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
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A new species of Neotropical freshwater stingray of the genus Potamotrygon Garman, 1877 from the Río Madrede Díos, Peru (Chondrichthyes: Potamotrygonidae) Pap. Avulsos de Zool. (São Paulo)
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
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Alpheus rudolphi spec. nov., a new snapping shrimp from northeastern Brazil (Crustacea: Decapoda: Alpheidae) Naturalis
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
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Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil) Neotropical Ichthyology
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
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Barcoding lepidoptera: current situation and perspectives on the usefulness of a contentious technique Neotropical Entomology
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
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Can sibling species of the Drosophila willistoni subgroup be recognized through combined microscopy techniques? Rev. Bras. entomol.
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
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Causative Agents of Aspergillosis Including Cryptic Aspergillus Species and A. fumigatus OAK
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
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Comparative cytogenetics of Astyanax (Teleostei: Characidae) from the upper Paraguay basin Neotropical Ichthyology
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
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Cryptic diversity within the harmful dinoflagellate Akashiwo sanguinea in coastal Chinese waters is related to differentiated ecological niches ArchiMer
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
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Cryptic species of Archinome (Annelida: Amphinomida) from vents and seeps ArchiMer
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
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Diversity and systematics of the sequestrate genus Octaviania in Japan: two new subgenera and eleven new species Naturalis
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
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Diversity, Distribution and Phylogeny of Hesionidae (Annelida) Colonizing Whale Falls: New Species of Sirsoe and Connections Between Ocean Basins ArchiMer
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
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Diversity of gall-forming rusts (Uromycladium, Pucciniales) on Acacia in Australia Naturalis
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 & 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
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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 Naturalis
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
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Easier detection of invertebrate "identification-key characters" with light of different wavelengths ArchiMer
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
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Epitypification of Fusarium oxysporum – clearing the taxonomic chaos Naturalis
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
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Evaluating methodologies for species delimitation: the mismatch between phenotypes and genotypes in lichenized fungi (Bryoria sect. Implexae, Parmeliaceae) Naturalis
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
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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 Naturalis
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
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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 ArchiMer
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
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Genetic evidence for a species complex within the piranha Serrasalmus maculatus (Characiformes, Serrasalmidae) from three Neotropical river basins based on mitochondrial DNA sequences Genet. Mol. Biol.
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
Registros recuperados: 32
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