Pemphixina Sous-embranchement (subphylum) des Rhynchonelliformea   Classe des Rhynchonellata  Ordre des Rhynchonellida  Super-famille des Pugnacoidea  Super-famille des Dimerelloidea  Super-famille des Norelloidea  Super-famille des Hemithiridoidea

Genus Pemphixina Cooper, 1981

[Type species= Rhynchonella nigricans var. pyxidata Davidson, 1880(p. 59)]

Small to medium, moderately dorsibiconvex, rounded to globular, strongly uniplicate, but dorsal fold scarcely raised; beak short, erect, foramen hypothyrid, elongate-oval, small; deltidial plates disjunct; shell surface multicostellate, costellae rounded, interrupted by numerous concentric growth lines. Hinge teeth thick, buttressed by short dental plates; crura short, crescentic in cross section, incipiently canaliform; dorsal median septum short but rising to crest just anterior to crura.

Present Diagnosis from volume 4 of the Treatise on Invertebrate Paleontology (2002)

Extant Species of Pemphixina

P. pyxidata (Davidson, 1880)

Diagnosis