Gastropoda - Opisthobranchiata - Cylichnidae
Alternative spelling: Cylichnopsis
Parent taxon: Cylichna according to H. E. Vokes 1939
See also Sepkoski 2002
Sister taxa: Cylichna (Acrostemma), Cylichna (Cylichna), Cylichna alba, Cylichna andersoni, Cylichna angustata, Cylichna angystoma, Cylichna attonsa, Cylichna aula, Cylichna calvertensis, Cylichna diegensis, Cylichna discus, Cylichna diversilirata, Cylichna elliptica, Cylichna faba, Cylichna fantasma, Cylichna greensboroensis, Cylichna incisa, Cylichna intermissia, Cylichna jacksonensis, Cylichna loismartinae, Cylichna makanjuolai, Cylichna occulta, Cylichna paupercula, Cylichna pessumata, Cylichna ramonensis, Cylichna salbriacensis, Cylichna secalina, Cylichna solivaga, Cylichna subalpina, Cylichna takashimaensis, Cylichna temblorensis, Cylichna tenuis, Cylichna venusta
Subtaxa: Cylichna (Cylichnopsis) compara
Ecology: epifaunal carnivore
Distribution:
• Eocene of United States (4: Alabama, South Carolina collections)
• Paleocene of United States (2: Texas)
• Cretaceous of United States (1: Mississippi)
Total: 7 collections each including a single occurrence