TOPALODISCORBIS Neagu, 1970

 

 

Type species: Discorbis (Topalodiscorbis) danubiensis Neagu, in Barbulescu and Neagu, 1970; OD.

Discorbis (Topalodiscorbis) Neagu. in Barbulescu and Neagu. 1970(_*133),p.110( also err. cit. as D. (Topolodiscorbis). p. 106).Topalodiscorbis Neagu. 1979 (*2237), p. 276( nom. transl.).Test large. up to 2.2 mm in diameter, discoidal, low trochospiral coil, all of the two to two and a half whorls visible on the weakly con^vex evolute spiral side, chambers rapidly increasing in breadth as added, later ones broad and low, nine to ten in the final whorl. sutures strongly curved and oblique, flat to slightly concave umbilical side partially evolute, part of the penultimate whorl remaining visiblearound thecentral umbilical boss, sutures less strongly curved than on the spiral side and slightly depressed. periphery subacute. peripheral outline entire; aperture interiomarginal, a short slit at the base of the final chamber in young individuals, more elongate in large specimens and extending from the umbilical margin along the basal suture about half the distance to the periphery, bordered by a narrow lip and may have a somewhat sinuate margin, previous apertures of the final whorl remain open around the umbilicus. U. Jurassic (U. Oxfordian to L. Kimmeridgian); Romania.