Atrypina buildwasensis

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Series: NRC Monograph Publishing Program
Published: 01 January 2004
EISBN: 9780660192666
...) appears to occur only in China: the sole difference is a dorsal fold (probably simply by enlargement and elevation of the space between the ventral mid-rib pair), and more biconvex shell. A similar commissure sulcation, with central ridge, is evident, for example, in Atrypina buildwasensis. Atrypinopsis...
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