Anthozoa - Stauriida - Petalaxidae

Full reference: E. W. Bamber and J. Fedorowski. 1998. Biostratigraphy and systematics of Upper Carboniferous cerioid rugose corals, Ellesmere Island, Arctic Canada. Geological Survey of Canada Bulletin 511:1-127

Belongs to Petalaxis according to E. W. Bamber and J. Fedorowski 1998

Sister taxa: Petalaxis allisonae, Petalaxis beauchampi, Petalaxis besti, Petalaxis branisai, Petalaxis crassicolumnus, Petalaxis ellesmerensis, Petalaxis elyensis, Petalaxis exiguus, Petalaxis mokomokensis, Petalaxis multilamellatus, Petalaxis occidentalis, Petalaxis parvus, Petalaxis sutherlandi, Petalaxis thorsteinssoni

Type specimen: Its type locality is GSC C-10891, E Blind Fiord B, Ellesmere Island, which is in a Kasimovian marine limestone in the Canyon Fiord Formation of Canada

Ecology: stationary epifaunal suspension feeder