Mollusks from late Mesozoic seep deposits, chiefly in California Kaim, Andrzej Jenkins, Robert G. Tanabe, Kazushige Kiel, Steffen Zootaxa 2014 3861 5 401 440 [238,346,1230,1256] Gastropoda Melanodrymiidae Ascheria CoL Animalia Neomphalida 15 416 Mollusca genus gen. nov.    Typespecies.  Abyssochrysos? giganteum Kiel et al., 2008b(see Fig. 7E–F herein) from a seep deposit on the east shore of Lake Berryessa in Napa County, California, USA; Early Cretaceous, Great Valley Group. This is locality # 12 in Kiel et al.(2008b)and was named East Berryessa therein.   Diagnosis.Large high-spired cerithiform shell with strong opisthocline axial ribs, numerous spiral lirae, and subsutural constriction developing on the adult portion of the shell. Ornament may remain throughout the ontogeny or may fade away on the adult whorls.  Species included:  Abyssochrysos? giganteum Kiel et al., 2008bfrom the Early Cretaceous of East Berryessa, California;  Chemnitzia eucosmeta Ascher, 1906from the Early Cretaceous of Hradiště (previously Grodischt) and Koňákov (previously Koniakau), Czech Republic; and undescribed new species from the Eocene of Barbadosidentified as  Diastomasp. and "Cerithid indet." by Kugler et al.(1984). The same specimens were later reillustrated and identified as “ Abyssochryssossp.” by Gill et al.(2005: fig. 5D) and as “zygopleurid sp. B” ( Gill et al.2005: fig. 5F, H, I).   Remarks.  Ascheriadiffers from  Abyssomelania gen. nov.described above by having evenly convex whorls, axial and spiral ornamentation throughout the ontogeny, and by the presence of a subsutural constriction. Furthermore,  Ascherialacks abyssomelanid riblets.  Abyssochrysos Tomlin, 1927differs by lacking a subsutural constriction. HumtulipsiaKiel, 2008 differs by having a deep notch in the aperture near the basal margin.   Etymology.In honor of Else Ascher who monographed the Early Cretaceous seep faunas from the Český Těšín area ( Ascher 1906).  Stratigraphic range.Early Cretaceous to late Eocene.