Kiel, S., Campbell, K.A., Elder, W.P., and Little, C.T.S. (2008) Jurassic and Cretaceous gastropods from hydrocarbon
seeps in forearc basin and accretionary prism settings, California // Acta Palaeontologica Polonica 53 (4): 679–703. pdf: http://www.app.pan.pl/archive/published/app53/APP53-679.pdf
Fourteen gastropod species from 16 Mesozoic hydrocarbon seep carbonate deposits of the Great Valley Group and Francis−
can Complex in California are described. Two genera are new: Bathypurpurinopsis has a fusiform shellwith a siphonal fold,
and variable Paskentana has turbiniform or littoriniform shells with spiral and/or scaly sculpture and convex or shouldered
whorls. Due to the lack of data on shell microstructure and protoconch morphology, many of our taxonomic assignments
have to remain tentative at present. Species that are described as new include: Hokkaidoconcha bilirata, H. morenoensis, H.tehamaensis (Hokkaidoconchidae), Abyssochrysos? giganteum (Abyssochrysidae?), Paskentana globosa, P. berryes−
saensis, and Bathypurpurinopsis stantoni (Abyssochrysoidea, family uncertain). The total fauna represents a mixed bag of
taxa that were: (i) widely distributed during the lateMesozoic (Amberleya); (ii) restricted to late Mesozoic seep carbonates
in California (Atresius, Bathypurpurinopsis, Paskentana); and (iii) members of seep/deep−sea groups with a long strati−
graphic range (abyssochrysids, hokkaidoconchids).
