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Record: oai:ARNO:235203

AuthorF.P. Wesselingh
TitleOn relict hydrobiid species in Brazilian Amazonia (Gastropoda, Prosobranchia, Hydrobiidae)
JournalBasteria
Volume64
Year2000
Pages129-136
ISSN0005-6219
KeywordsSouth America; Amazonia; Miocene; Recent; Hydrobiidae; Dyris; Sioliella; new species
AbstractTwo extant hydrobiid species from the lower Tapajos river of Brazil are redescribed. Potamopyrgus amazonicus Haas, 1949, is assigned to the genus Dyris Conrad, 1871. At least eleven species from Miocene deposits of Western Amazonia are assigned to Dyris, a genus that was previously assumed to be extinct. The apertural features of Sioliella effusa Haas, 1949, are considered indicative of a close relationship to Miocene Amazonian taxa formaly assigned to Eubora Kadolsky, 1980. Sioliella ovata spec. nov., a Miocene species resembling S. effusa is described. The two Tapajos species can be regarded as relicts of a speciose, endemic, Miocene Western Amazonian molluscan fauna.
Classification42.73 ; 38.22
Document typearticle
Download paperpdf document http://www.repository.naturalis.nl/document/54012