A new genus of chemosymbiotic vesicomyid bivalves from the Oligocene of western North America.

IF 1.8 3区 地球科学 Q2 PALEONTOLOGY
Frida Hybertsen, S. Kiel, J. Goedert
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引用次数: 0

Abstract

A new genus of chemosymbiotic vesicomyid bivalve from the Oligocene of western North Palaeontologica 67 (X): xxx–xxx. 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.
北美西部渐新世趋化共生双壳类一新属。
华北西部渐新世趋化共生双壳类一新属(X): xxx-xxx。我们描述了来自北美西部的两个渐新世物种(以前属于Archivesica)的趋化共生双壳类Vesicomyidae, Squiresica的新属。其特征为小而弱膨胀的壳,小至几乎没有的苍白窦,类似Archivesica的铰链齿列,有不清楚至切口良好的月牙切口。该属有两种:模式种S. knapptonensis(来自美国华盛顿州西部)和S. marincovichi(来自美国阿拉斯加渐新世地层)。Squiresica knapptonensis此前在林肯溪组渐新世上部被发现;在此报告了在林肯溪组渐新世下部新发现的渗漏矿床的进一步标本。
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来源期刊
Acta Palaeontologica Polonica
Acta Palaeontologica Polonica 地学-古生物学
CiteScore
2.80
自引率
5.60%
发文量
36
审稿时长
12.5 months
期刊介绍: Acta Palaeontologica Polonica is an international quarterly journal publishing papers of general interest from all areas of paleontology. Since its founding by Roman Kozłowski in 1956, various currents of modern paleontology have been represented in the contents of the journal, especially those rooted in biologically oriented paleontology, an area he helped establish. In-depth studies of all kinds of fossils, of the mode of life of ancient organisms and structure of their skeletons are welcome, as those offering stratigraphically ordered evidence of evolution. Work on vertebrates and applications of fossil evidence to developmental studies, both ontogeny and astogeny of clonal organisms, have a long tradition in our journal. Evolution of the biosphere and its ecosystems, as inferred from geochemical evidence, has also been the focus of studies published in the journal.
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