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A global review of the Virgianidae (Ashgillian-Llandovery, Brachiopoda, Pentameroidea)

Published online by Cambridge University Press:  14 July 2015

Rong Jia-Yu  and
A. J. Boucot
Rong Jia-Yu
Affiliation:
Nanjing Institute of Geology and Palaeontology, Academia Sinica, Chi-Ming-Ssu, Nanjing 210008, People's Republic of China
A. J. Boucot
Affiliation:
Department of Zoology, Oregon State University, Corvallis, 97331-2914
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Abstract

A review of the Late Ordovician, chiefly mid-Ashgillian, to Early Silurian, Llandoverian, pentameroidean brachiopods, the Virgianidae, permits them to be assigned to three subfamilies (Virgianinae [10 genera assigned], Mariannaellinae [5 genera assigned], Pleurodiinae [2 genera assigned]). Diagnoses are presented for each subfamily, with comments on diagnostic characters for each genus and species. All the genera occur in what are interpreted to have been relatively low latitude, warm water environments in Arctic North America, northern Europe, northern Asia, central Asia and South China; the presence of Australian Ordovician virgianids is uncertain at this time. The mid-Ashgillian pentameroid adaptive radiation was followed by latest Ordovician mass extinction, subsequently surviving recovery and radiation in the middle-Late Llandovery. Silurian radiations convergently mimicked the Ordovician event in many respects.

Type
Research Article
Information
Journal of Paleontology , Volume 72 , Issue 3 , May 1998 , pp. 457 - 465
Copyright
Copyright © The Paleontological Society 

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