†family Philinidae Gray 1850 (snail)
Gastropoda - Opisthobranchia - Philinidae
Parent taxon: Philinoidea according to G. Rosenberg 2005
See also Beesley 1998, Squires 1984 and Turner 1938
Sister taxa: Aglajidae, Cylichnidae, Gastropteridae, Philinoglossidae, Retusidae, Scaphandridae
Subtaxa: Megistostoma
Ecology: epifaunal carnivore
Distribution:
• Miocene of Germany (1 collection)
• Eocene of Mexico (1), United States (11: California, Mississippi, Oregon, Washington)
• Paleocene of United States (2: California)
Total: 15 collections each including a single occurrence