Consulta: subjectFacets:"DNA taxonomy"
Registros recuperados: 2
Data/hora: 10/06/2024 02:56:58

Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Egger, Christina; Neusser, Timea P.; Norenburg, Jon; Leasi, Francesca; Buge, Barbara; Vannozzi, Angelo; Cunha, Regina L.; Cox, Cymon J.; Jörger, Katharina M.
Caecidae is a species-rich family of microsnails with a worldwide distribution. Typical for many groups of gastropods, caecid taxonomy is largely based on overt shell characters. However, identification of species using shell characteristics is problematic due to their rather uniform, tubular shells, the presence of different growth stages, and a high degree of intraspecific variability. In the present study, a first integrative approach to caecid taxonomy is provided using light-microscopic investigation with microsculptural analyses and multi-marker barcoding, in conjunction with molecular species delineation analyses (ABGD, haplotype networks, GMYC, and bPTP). In total 132 specimens of Caecum and Meioceras collected during several sampling trips to...
Tipo: Text
Palavras-chave: DNA taxonomy; Marine biodiversity; Meiofauna; Molecular species delineation; Mollusca.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00651/76325/77304.pdf

An integrative approach to species delimitation in Benthomangelia (Mollusca: Conoidea)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Puillandre, Nicolas; Baylac, Michel; Boisselier, Marie-catherine; Cruaud, Corinne; Samadi, Sarah.
DNA sequences are currently used to propose primary hypotheses of species delimitation, especially when morphological variability is difficult to assess. In an integrative taxonomy framework, these hypotheses are then compared with other characters, such as morphology or geography, to produce robust species delimitations. For this purpose, the cytochrome oxidase subunit I (COI) gene has been sequenced for almost 50 specimens of the genus Benthomangelia, a deep-sea marine gastropod genus, collected in the South-West Pacific. Five genetic groups, displaying low and high genetic distances respectively within and between groups, were defined. COI hypotheses were compared with both the results obtained with the independent nuclear 28S gene and with an elliptic...
Tipo: Text
Palavras-chave: 28S rRNA; COI gene; DNA taxonomy; Elliptic fourier analysis; Integrative taxonomy; Molluscs.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00206/31678/30065.pdf