The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species Author Zhang, Jun-Long Author Xu, Feng-Shan Author Liu, Rui-Yu text Zootaxa 2012 3383 39 60 journal article 44680 10.5281/zenodo.281734 43dab820-4818-4933-9e7b-c15187db9fb6 1175-5326 281734 Genus Cryptomya Conrad, 1848 Cryptomya Conrad, 1848 : 121 . Diagnosis. Shell compressed, ovate, right valve slightly larger and deeper than left valve, posterior end sub-truncated; sculpture of narrow commarginal growth lines; pallial sinus shallow. Type species. Sphaenia californica Conrad, 1837 (by monotypy).