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| Registros recuperados: 48 | |
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| Morineaux, Marie; Nishi, Eijiroh; Ormos, Andrea; Mouchel, Olivier. |
| Phyllochaetopterus polus, a new species of the polychaete family Chaetopteridae is described. Specimens were collected at the Ashadze-1 vent field (Mid-Atlantic Ridge), from 4100-4200 m depth. P polus is the first chaetopterid reported from the Atlantic hydrothermal vents. Three chaetopterid species have been recorded from deep-sea hydrothermal vents belonging to two genera, Spiochaetopterus and Phyllochaetopterus. P polus sp. nov. is a medium-sized chaetopterid, characterized by 9 chaetigers in region A and 2 in region B; region C is usually incomplete in the specimens examined, but has at least 40-70 chaetigers. This polychaete has one pair of modified chaetae in chaetiger 4 with a pear-shaped obliquely truncated head, triangular uncini and a branched... |
| Tipo: Text |
Palavras-chave: Polychaeta; Hydrothermal vent; Mid-Atlantic Ridge; Taxonomy; New species; COI. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00013/12439/9250.pdf |
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| Nieukerken, E. van; Wagner, D.; Baldessari, M.; Mazzon, L.; Angeli, G.; Girolami, V.; Duso, C.; Doorenweerd, C.. |
| A grapevine leafminer Antispila oinophylla van Nieukerken & Wagner, sp. n., is described both from eastern North America (type locality: Georgia) and as a new important invader in North Italian vineyards (Trentino and Veneto Region) since 2006. The species is closely related to, and previously confused with A. ampelopsifoliella Chambers, 1874, a species feeding on Virginia creeper Parthenocissus quinquefolia (L.) Planchon., and both are placed in an informal A. ampelopsifoliella group. Wing pattern, genitalia, and DNA barcode data all confirm the conspecificity of native North American populations and Italian populations. COI barcodes differ by only 0–1.23%, indicating that the Italian populations are recently established from eastern North America.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Invasive species; New species; Vitaceae; Viticulture; COI; Leafmines; Venation; Genitalia; Holocacista rivillei; 42.75. |
| Ano: 2012 |
URL: http://www.repository.naturalis.nl/record/411010 |
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| GONZÁLEZ-WEVAR,CLAUDIO ALEJANDRO; DÍAZ,ANGIE; GERARD,KARIN; CAÑETE,JUAN IVÁN; POULIN,ELIE. |
| Diversity, abundance and composition of taxonomic groups in the Southern Ocean differ from elsewhere in the planet, since the biogeography in this region reflects the complex interactions of tectonics, oceanography, climate and biological elements since the Eocene. Several groups of marine benthic organisms exhibit high levels of genetic divergence among provinces in this region, supporting the existence of a vicariance process through plate tectonics, while other groups with high dispersive capacity exhibit recent divergence processes. Moreover, the discovery of non-Antarctic decapod larvae in Antarctic Peninsula suggests that some groups can travel across the Antarctic Circumpolar Current. Here we analyzed levels of genetic divergence in congeneric... |
| Tipo: Journal article |
Palavras-chave: Antarctic Circumpolar Current; COI; Oceanographic barrier; Planktotrophy; Pliocene separation. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000400007 |
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| Tresbach, Rafael Hencke; Cerqueira, Natalia Menezes; Medeiros, Sarah Ramos; Gutierrez, Harold Julián Pérez; Hernández, Natalia Ossa; Rodrigues, Marília Danyelle Nunes. |
| The identification of genus and species is made by systematic, by noticing morphological and anatomical characteres which were the phenotype expression. However, changes in one or more gene bases can result in phenotypes similarities between different species, inducing an identification error. Alternatively, molecular appliances based in mithocondrial and ribosomal genes appeared. This study aims to compile information about the molecular identification and present the South American Catfish (Rhamdia quelen) case, for which there is controversy generated by taxonomy identification. The different genes used to identification have their particularities, like insertions and deletions on the case of 16S rRNA and the 18S rRNA. Besides these ribosomal genes,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA barcoding; Peixes; Rhamdia quelen; COI; DNA mitocondrial; DNA ribossomal. |
| Ano: 2015 |
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/10408 |
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| Pires,Amanda Ciprandi; Marinoni,Luciane. |
| The taxonomic crisis, emphasized in recent years, is marked by the lack of popularity (lack of interest in taxonomy) and financial incentives to study biodiversity. This situation, coupled with the issues involved with the necessity of knowing many yet undiscovered species, has meant that new technologies, including the use of DNA, have emerged to revitalize taxonomy. Part of the scientific community, however, has rejected the use of these innovative ideas. DNA barcoding has especially been the target of numerous criticisms regarding its application, as opposed to the use of morphology. This paper aims to highlight the inconsistency of the debate involving DNA versus morphology, since there is a proposal for the integration of traditional taxonomy and DNA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; COI; Species; Taxonomic impediment; Morphology. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200035 |
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| Ribolli,Josiane; Scaranto,Bianca Maria; Shibatta,Oscar Akio; Bombardelli,Robie Allan; Zaniboni-Filho,Evoy. |
| ABSTRACT DNA barcoding is a widely utilized molecular-based identification of species and taxonomic resolutions. Until recently, Rhamdia voulezi and Rhamdia branneri were considered species synonyms of Rhamdia quelen; however, morphological and cytogenetic analyses have suggested the validity of distinct species. Due to the absence of molecular taxonomy of R. voulezi and R. branneri, the objective of this study was to test its validity through traditional DNA barcoding and the GMYC (General Mixed Yule Coalescent) COI-based analyses in 19 specimens from the Iguaçu River Basin. In both methodologies, three MOTUs (Molecular Operational Taxonomic Units) were identified based on the estimated optimum threshold (OT = 0.77). The average inter-MOTU distance (NJ,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; COI; Jundiá; MOTU; Species complex. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100217 |
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| Guzmán Valencia, Stephanie. |
| La identidad y estructura genética de poblaciones de Oligonychus punicae y O. perseae (Acari: Tetranychidae) fue estudiada en siete localidades productoras de aguacate Persea americana var. Hass. La identidad de los ácaros fue determinada morfológica y molecularmente mediante la secuenciación de una fracción del gen Citocromo Oxidasa subunidad I (COI). La variación genética intraespecífica de diferentes poblaciones de ambas especies de ácaros fue estudiada mediante la secuenciación de las regiones ITS1 e ITS2 del rADN. El análisis filogenético de las secuencias parciales del gen COI separó adecuadamente las dos especies de ácaros, confirmando los resultados de la identificación morfológica. El análisis de las secuencias de las regiones ITS1 e ITS2 del... |
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Palavras-chave: COI; ITS1; ITS2; Estructura genética; Entomología y Acarología; Maestría; Genetic structure. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1765 |
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| Potkamp, G.; Vermeij, M.J.A.; Hoeksema, B.W.. |
| Snails of the genus Coralliophila (Muricidae: Coralliophilinae) are common corallivores in the Caribbean, feeding on a wide range of host species. In the present study, the morphological and genetic variation in C. galea and C. caribaea were studied in relation to their association with host coral species at Curaçao. Differences in shell shape among snails living on different hosts were quantified using geometric morphometric and phylogenetic relationships were studied using two mitochondrial markers (12S and COI). Based on these analyses, a new species, C. curacaoensis sp. nov., was found in association with the scleractinian coral Madracis auretenra. Both C. galea and C. caribaea showed host-specific differences in shell shape, size, and shell allometry... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Genetic differentiation; Phylogenetics; 12S; COI; Corallivory; Morphology; Geometric morphometrics; Host race. |
| Ano: 2017 |
URL: http://www.repository.naturalis.nl/record/630190 |
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| Paim,Fabilene Gomes; Brandão,José Henrique Souza Galdino; Sampaio,Iracilda; Affonso,Paulo Roberto Antunes de Mello; Diniz,Débora. |
| Parrotfishes (Labridae, Scarinae) comprise a large marine fish group of difficult identification, particularly during juvenile phase when the typical morphology and coloration of adults are absent. Therefore, the goal of this study was to test cytogenetic markers and DNA barcoding in the identification of bucktooth parrtotfish Sparisoma radians from the northeastern coast of Brazil. Sequencing of cytochrome c oxidase subunit I (COI) confirmed all studied samples as S. radians, and all showed high similarity (99-100%) with Caribbean populations. The karyotype of this species was divergent from most marine Perciformes, being composed of 2n = 46 chromosomes. These consisted of a large number of metacentric and submetacentric pairs with small amounts of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: COI; Karyotype; South Atlantic fish; Ribossomal genes; Robertsonian rearrangements. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500007 |
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| Wetzer, R.. |
| Carefully collected molecular data and rigorous analyses are revolutionizing today’s phylogenetic studies. Although molecular data have been used to estimate various invertebrate phylogenies lor more than a decade, this study is the first survey of different regions of mitochondrial DNA in isopod crustaceans assessing sequence divergence and hence the usefulness of these regions to infer phylogeny at different hierarchical levels. 1 evaluate three loci from the mitochondrial genome (two ribosomal RNAs (12S, 16S) and one protein-coding (COI)) for their appropriateness in inferring isopod phylogeny at the suborder level and below. The patterns are similar for all three loci with the most speciose suborders of isopods also having the most divergent... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mitochondrial DNA; Isopod; Crustacea; Molecular; 12S rRNA; 16S rRNA; COI. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/534397 |
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| Hett,Anne Kathrin; Nirchio,Mauro; Oliveira,Claudio; Siccha,Zoila Raquel; Rossi,Anna Rita; Sola,Luciana. |
| This study reports the description of the karyotype of Mugil incilis from Venezuela. The chromosome complement is composed of 48 acrocentric chromosomes, which uniformly decrease in size. Therefore, the homologues can not be clearly identified, with the exception of one of the largest chromosome pairs, classified as number 1, whose homologues may show a subcentromeric secondary constriction, and of chromosome pair number 24, which is considerably smaller than the others. C-banding showed heterochromatic blocks at the centromeric/pericentromeric regions of all chromosomes, which were more conspicuous on chromosomes 1, given the C-positive signals include the secondary constrictions. AgNO3 and fluorescent in situ hybridization (FISH) with 45S rDNA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: C-banding; COI; 5S rDNA; Mullet; NORs. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100008 |
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| Araújo,Maíra Xavier; Aragão,Marcos; Cordeiro,Danilo; Bravo,Freddy; Carvalho,Claudio José Barros de; Andena,Sergio R.. |
| ABSTRACT A new species of Trichomyia from the state of Bahia, Brazil, is described and illustrated, and male and female are associated using DNA barcoding. Additionally, fragments of the COI of two other species, Trichomyia cerdosa Araújo & Bravo, 2016 and Trichomyia ituberensis Araújo & Bravo, 2016, and the females of two unidentified species, are sequenced. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA-barcoding; COI; Neotropical Region; Psychodid; Trichomyiinae. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000400283 |
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| Sousa,Luciene C.C.; Gontijo,Célia M.F.; Botelho,Helbert A.; Fonseca,Cleusa G.. |
| Didelphis albiventris is a well-known and common marsupial. Due to its high adaptability, this very widespread generalist species occurs under various environmental conditions, this even including protected regions and disturbed urban areas. We studied a 653 bp fragment of cytochrome oxidase c (COI) from 93 biological samples from seven Brazilian localities, with linear distances ranging between 58 and about 1800 km to analyze the effects of geographic distances on variability and genetic differentiation. The haplotype network presented nine haplotypes and two genetic clusters compatible with the two most distant geographic areas of the states of Minas Gerais, in the southeast, and Rio Grande do Sul, in the extreme south. As each cluster was characterized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Didelphis albiventris; Marsupial; Variability; COI; Genetic differentiation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300020 |
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| Registros recuperados: 48 | |
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