文章基本信息

标题：A new genus of chemosymbiotic vesicomyid bivalves from the Oligocene of western North America
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作者：FRIDA HYBERTSEN ; JAMES L. GOEDERT ; STEFFEN KIEL 等
期刊名称：Acta Palaeontologica Polonica
印刷版ISSN：0567-7920
电子版ISSN：1732-2421
出版年度：2022
卷号：67
期号：3
页码：703-709
DOI：10.4202/app.00992.2022
语种：English
出版社：Institute of Paleobiology PAS
摘要：We describe a new genus of the chemosymbiotic bivalve family Vesicomyidae, Squiresica, for two Oligocene species, previously assigned to Archivesica, from western North America. Squiresica is characterized by a small and weakly inflated shell, a small to nearly absent pallial sinus, an Archivesica-like hinge dentition, with an indistinct to well incised lunular incision. Two species are assigned to this new genus: the type species, S. knapptonensis from western Washington State, USA, and S. marincovichi from Oligocene strata of Alaska, USA. Squiresica knapptonensis had previously been described from the upper Oligocene of the Lincoln Creek Formation; further specimens are here reported from a newly discovered seep deposit in the lower Oligocene part of the Lincoln Creek Formation.