Abyssothyris Sous-embranchement (subphylum) des Rhynchonelliformea   Classe des Rhynchonellata  Ordre des Terebratulida  Sous-ordre des Terebratulidina  Super-famille des Terebratuloidae  Super-famille des Dyscolioidae  Super-famille des Cancellothyroidea

Genus Abyssothyris Thomson, 1927

[Type species= Terebratula wyvilli Davidson, 1878 (p. 436)]

Small to medium, oval to subpentagonal in outline, ventribiconvex, smooth, thin shelled; anterior commissure unisulcate; beak small, suberect; foramen large, permesothyrid; symphytium partly visible; pedicle collar short, teeth small; cardinal process small, semielliptical, outer hinge plates narrowly triangular, tapering anteriorly to bluntly pointed crural processes located at midloop; crural bases narrow; transverse band broad, gently folded medially, anterior part of loop variable, anterolateral extremities rounded to subangular. Lophophore plectolophous with small median coil.

Miocene - Present Diagnosis from volume 5 of the Treatise on Invertebrate Paleontology (2006)

Extant Species of Abyssothyris

A. wyvillei (Davidson, 1878)

Diagnosis

FIGURES : Abyssothyris wyvillei      Geographic distribution