Anthozoa - Stauriida - Petalaxidae

Belongs to Petalaxis according to J. Fedorowski et al. 2007

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

Type specimen: Its type locality is UCMP D-845, Potter Ridge, which is in a Sakmarian marine limestone/limestone in the McCloud Formation of California

Ecology: stationary epifaunal suspension feeder