Gastropoda - Bellerophontida - Bucaniidae
Alternative spellings: Porcellia (Tremanotus), Trematonotus
Synonyms: Gyrotrema Lindström 1884 [objective synonym], Tremagyrus Perner 1903
Full reference: J. Hall. 1868. Account of some new or little known species of fossils from rocks of the age of the Niagara group. Annual report of the Regents of the University of the State of New York on the State Cabinet of Natural History and the Historical and Antiquarian collection annexed thereto 20:305-352
Parent taxon: Tremanotinae according to P. J. Wagner 2011
Sister taxa: Boiotremus, Goniotremus
Subtaxa: Tremanotus angustata, Tremanotus aymestriensis, Tremanotus chicagoensis, Tremanotus civis, Tremanotus compressus, Tremanotus crassolare, Tremanotus cyclocostatus, Tremanotus deficiens, Tremanotus dilatatus, Tremanotus inopinata, Tremanotus minutus, Tremanotus nautiloidea, Tremanotus parvus, Tremanotus pervoluta, Tremanotus planorbis, Tremanotus portlocki, Tremanotus pritchardi, Tremanotus profundus, Tremanotus trigonostoma, Tremanotus tuboides
Type: Tremanotus alpheus
Ecology: epifaunal detritivore