Gastropoda - Heterostropha - Pyramidellidae
Alternative spellings: Cossmannica, Pyramidella (Cossmannica)
Parent taxon: Pyramidellidae according to P. Jeffery and S. Tracey 1997
See also Garvie 1996, Kendrick 1990 and Sepkoski 2002
Sister taxa: Aartsenia, Agatha, Bartschella, Besla, Boonea, Brachystomia, Callolongchaeus, Careliopsis, Chemnitzia, Chrysalida, Creonella, Cyclostremella, Dunkeria, Eulimella, Evalea, Gumina, Henrya, Herviera, Iolaea, Iselica, Ivara, Ividella, Kleinella, Lacrimiforma, Linopyrga, Longchaeus, Milda, Miralda, Nisosyrnola, Nodostoma, Odontostomia, Odostomella, Odostomia, Odostomiinae, Odostominae, Ondina, Orinella, Otopleura, Paramormula, Peristichia, Pharcidella, Ptycheulimella, Pyramidellinae, Pyrgolampros, Pyrgulina, Salassia, Sayella, Strioturbonilla, Syrnola, Triptychus, Turbonillinae, Ugartea, Waikura
Subtaxa: Cossmannica agassizi Pyramidella (Cossmannica) tundrae
Ecology: epifaunal carnivore
Distribution:
• Quaternary of Australia (1 collection)
• Eocene of the United Kingdom (5), United States (9: Texas)
• Paleocene of Belgium (1)
Total: 16 collections including 23 occurrences