RELATIONSHIPS AMONG PROBLEMATIC NORTH-AMERICAN STAGNICOLINE SNAILS (PULMONATA, LYMNAEIDAE) REINVESTIGATED USING NUCLEAR RIBOSOMAL-RNA INTERNAL TRANSCRIBED SPACER SEQUENCES

Citation
Ea. Remigio et D. Blair, RELATIONSHIPS AMONG PROBLEMATIC NORTH-AMERICAN STAGNICOLINE SNAILS (PULMONATA, LYMNAEIDAE) REINVESTIGATED USING NUCLEAR RIBOSOMAL-RNA INTERNAL TRANSCRIBED SPACER SEQUENCES, Canadian journal of zoology, 75(9), 1997, pp. 1540-1545
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
75
Issue
9
Year of publication
1997
Pages
1540 - 1545
Database
ISI
SICI code
0008-4301(1997)75:9<1540:RAPNSS>2.0.ZU;2-V
Abstract
The taxonomic relationships among four stagnicoline snail species from North America were reassessed by analysing nucleotide sequences from their nuclear ribosomal internal transcribed spacer (ITS) region. Thre e of the species (Stagnicola catascopium, Stagnicola emarginata, and S tagnicola elodes) are representatives of the subgenus Stagnicola s.str . from the northern U.S.A. and the fourth is a closely related Canadia n species (Stagnicola caperata) belonging to the subgenus Hinkleyia. M embers of the two subgenera differed considerably in their ITS sequenc es, demonstrating the usefulness of these sequences for distinguishing species from closely related lymnaeid subgenera. In contrast, ITS seq uences for the three members of the subgenus Stagnicola s.str. were ve ry similar, which supports an earlier view that they may not be separa te species.