Ascheria

Kaim, Andrzej, Jenkins, Robert G., Tanabe, Kazushige & Kiel, Steffen, 2014, Mollusks from late Mesozoic seep deposits, chiefly in California, Zootaxa 3861 (5), pp. 401-440: 416

publication ID

http://dx.doi.org/10.11646/zootaxa.3861.5.1

publication LSID

lsid:zoobank.org:pub:E62DB6C3-0C5F-4898-99C4-1BEC70DD1734

persistent identifier

http://treatment.plazi.org/id/03F4372E-FFE9-6841-FF34-059FFCF0F801

treatment provided by

Plazi

scientific name

Ascheria
status

gen. nov.

Genus Ascheria   gen. nov.

Type species. Abyssochrysos   ? giganteum Kiel et al., 2008 b (see Fig. 7 View FIGURE 7. A – D E –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. (2008 b) 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., 2008 b from the Early Cretaceous of East Berryessa, California; Chemnitzia eucosmeta Ascher, 1906   from the Early Cretaceous of Hradiště (previously Grodischt) and Koňákov (previously Koniakau), Czech Republic; and undescribed new species from the Eocene of Barbados identified as Diastoma   sp. and "Cerithid indet." by Kugler et al. (1984). The same specimens were later reillustrated and identified as “ Abyssochryssos sp.” by Gill et al. (2005: fig. 5 D) and as “zygopleurid sp. B” ( Gill et al. 2005: fig. 5 F, H, I).

Remarks. Ascheria   differs 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, Ascheria   lacks abyssomelanid riblets. Abyssochrysos Tomlin, 1927   differs by lacking a subsutural constriction. Humtulipsia Kiel, 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.