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 Abyssorhynchia Zezina, 1980
[Type species= Hemithyris craneana Dall, 1895, p. 717]
Medium, translucent, rounded-triangular; rectimarginate to broadly sulcate; ventribiconvex; shell smooth to faintly striate; beak short, suberect, foramen open, large, hypothyrid. Dorsal septum very short and low; crura anteriorly enlarged, forming small, flat, spadelike distal ends.

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

Extant Species of Abyssorhynchia
  • A. craneana (Dall, 1895)
  • Diagnosis

    Abyssorhynchia craneana  (Dall, 1895)

    Type locality: xx
    Depth range: 284 - 6179 m

    Hemithyris craneana Dall, 1895


    Diagnose in preparation - (Cooper, 1981)