Middle Triassic Gastropoda from Qingyan, Guizhou Province, China; 3, Euomphalacea and Loxonematacea

Wuhan Coll. Geol., Paleontol. Lab., Wuhan, Hubei, China
U. S. Geol. Surv., United States

This is the third and final paper documenting a gastropod fauna, primarily of Anisian age (Triassic) from a section near Qingyan, China. Seven species of Euomphalacea, under three genera, are found at this locality. Three new species of euomphalaceans are named; Triassocirrus and Discohelix (Discogonius) are new genus-level taxa. All high-spired gastropods are placed within the Loxonematacea and representatives of three families are recognized. Nine genera and eleven species are distinguished; of the eleven, two species are new. As with the previously described familial groups, about half the species are known from Western Europe.--Modified journal abstract.

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