[1] The type specimen, named CMNH 46133, consists of a brain case, poorly preserved jaws and gills, a pectoral fin, and a partial vertebral axis.

[1] This creatures most startling feature were its broad pectoral fins which resembled those of stingrays and angel sharks (Squatina).

[1] Remains found in the South Urals of Russia and the Eyam Limestone of Derbyshire, England, have been tentatively identified as those belonging to S.

[4] Thrinacoselache Doliodus Cladoselache Squatinactis Triodus Orthacanthus Dracopristis Ctenacanthus Homalodontus Hopleacanthus Wodnika Tristychius Surcaudalus Bandringa Sphenacanthus Gansuselache Onychoselache Hamiltonicthys This fish was probably a benthic predator; it probably lived half-buried in the sand and suddenly emerged to throw itself against the prey swimming nearby.

The flattened body plan is typical of bottom-dwelling predators, and is known in a large number of cartilaginous fish, both extinct and extant.