Acta Palaeontologica Polonica

New bizarre micro-spiriferid brachiopod from the Early Carboniferous of China

Yuanlin Sun, Andrzej Baliński, Xueping Ma, and Yubo Zhang

Acta Palaeontologica Polonica 49 (2), 2004: 267-274

The verneuiliid brachiopod Changshunella yangi gen. et sp. nov. is described from the Early Carboniferous Muhua Formation of Guizhou, China. This rather unusual form is characterized by having very small shell dimensions (2.6-4 mm in length), a very high flat procline ventral interarea, and by having three prominent plications on both valves that are arranged in opposed folding; the last feature is characteristic for the family Verneuiliidae. We suggest that the family has been derived from an offshoot of the stock that produced the superfamilies Spiriferoidea, Paeckelmanelloidea, and Brachythyridoidea by developing opposed folding and loss of dental plates or dental adminicula as exemplified by Verneuilia and Changshunella gen. nov.

Key words: Brachiopoda, Verneuiliidae, Early Carboniferous, China.

Yuanlin Sun [] Xueping Ma, and Yubo Zhang, Department of Geology, Peking University, Beijing 100871, China; Andrzej Baliński [], Instytut Paleobiologii PAN, ul. Twarda 51/55, PL−00−818 Warszawa, Poland.

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