New Silurian neotaxodont bivalves from South Wales and their phylogenetic significance

被引：0

作者：

Ratter, VA ^{[1
]}

Cope, JCW ^{[1
]}

机构：

[1] Cardiff Univ, Dept Earth Sci, Cardiff CF1 3YE, S Glam, Wales

来源：

PALAEONTOLOGY | 1998年 / 41卷

关键词：

D O I：

暂无

中图分类号：

Q91 [古生物学];

学科分类号：

0709 ; 070903 ;

摘要：

The arcoidean bivalves, Trecanolia acincta gen. et sp. nov. and Uskardita mikraulax gen. et sp. nov., are described from the Wenlock of South Wales. These bivalves are accommodated within the new family Frejidae, alongside the closely related Silurian genera Freja Liljedahl and Alytodonta Cope. The frejids are characterized by an amphidetic, chevron-shaped duplivincular ligament, and a ventrally diverging dental arrangement of pseudocardinals and pseudolaterals. The group provides further evidence that the superfamily Arcoidea evolved from an early Ordovician ancestor, such as Catamarcaia Sanchez and Babin. The frejids represent an early diversification of the arcoideans, previously unknown in the Palaeozoic.

引用

页码：975 / 991

页数：17

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