A new species of Pseudomphala Heude, 1882 (Gastropoda, Truncatelloidea, Assimineidae) from Zhoushan of Zhejiang Province, East China Sea.

A new species that is putatively assigned to the genus Pseudomphala Heude, 1882 (Truncatelloidea, Assimineidae) and that was collected from the East China Sea is described and illustrated. The new species is characterized by: a shell with subsutural thread, umbilicus covered, a penis without papilla, central teeth of the radula with 4-5 pairs of strong basal cusps laterally, and outer marginal teeth with 6-7 large cusps and a thin flaring flap. Furthermore, Bayesian inference and maximum-likelihood analyses conducted on a partial sequence of the COI mitochondrial fragment have provided additional support for the systematic classification of this new taxon.