Gastropoda - Cerithioidea - Cerithiidae
Alternative spelling: Semivertagus
Parent taxon: Clava according to J.-M. Pacaud and J. Le Renard 1995
See also Harzhauser 2004, Hendy 2007 and Sepkoski 2002
Sister taxa: Rhinoclavis (Hopkinsiana), Rhinoclavis (Longicerithium), Rhinoclavis (Ochetoclava), Rhinoclavis (Proclava), Rhinoclavis (Rhinoclavis), Rhinoclavis ampullosa, Rhinoclavis articulata, Rhinoclavis aspera, Rhinoclavis bituberculata, Rhinoclavis brettinghami, Rhinoclavis fasciata, Rhinoclavis kochi, Rhinoclavis orditus, Rhinoclavis sinensis, Rhinoclavis submelanoides, Rhinoclavis vertagus, Rhinoclavis voglinoi, Clava (Pseudovertagus), Clava (Striovertagus), Clava aspera, Clava alajuela, Clava (Clava), Clava costaricana, Clava plebeia, Clava (Clavocerithium), Vertagus kachhensis, Vertagus oligoasper, Cerithium (Vertagus) rudloffi
Subtaxa: none
Ecology: epifaunal grazer
Distribution:
• Quaternary of Australia (1 collection), United States (4: Hawaii)
• Pliocene of Australia (1)
• Miocene of Australia (3)
• Oligocene of United States (5: Florida, Mississippi)
• Eocene of France (9), the United Kingdom (1)
• Paleocene of Belgium (1), Colombia (1), France (1), Greenland (1), United States (1: Texas)
Total: 29 collections including 36 occurrences