Kalenteridae Marwick, 1953

Jenkins, Robert G., Kaim, Andrzej, Little, Crispin T. S., Iba, Yasuhiro, Tanabe, Kazushige & Campbell, Kathleen A., 2013, Worldwide distribution of the modiomorphid bivalve genus Caspiconcha in late Mesozoic hydrocarbon seeps, Acta Palaeontologica Polonica 58 (2), pp. 357-382 : 359

Family Kalenteridae Marwick, 1953

Remarks.—Originally classified as a modiomorphid bivalve in the subfamily Myoconchinae ( Kelly et al. 2000) , Caspiconcha indeed shares many features with Myoconcha , including the deeply set anterior adductor muscle scars with myophoric buttress, modioliform shape, and extreme reduction of the shell anterior ( Fig. 2 ). Therefore, following Kelly et al. (2000), we place Caspiconcha into the family Kalenteridae (an older synonym of Myoconchidae ; see e.g., Bouchet et al. 2010). We also compare Caspiconcha to Myoconcha americana because of previous incorrect placements of the latter species within the former genus ( Stewart 1930; Kiel et al. 2010).

Figures

Fig. 2. Schematic illustration of the right valve internal features of Caspiconcha major (Gabb, 1869).