EPISTOMARIA Galloway. 1933

 

 

type species: Discorbina rimosa Parker and Jones, in Carpenter et al.. 1862 (_*494), p. 205: OD.

Epistomaria Galloway. 1933(*1205). p.286 mom. subst. pro Epistomella Cushman. 1928).

Epistomella Cushman. 1928(^*748). p. 6( non Epistomella Zittel 1878). type species: obj.; OD.

Test in a low trochospiral coil. moderately biconvex, about two whorls of relatively broad and low chambers visible on thc spiral side, increasing in relative height as added. sutures gently curved, depressed, only the subtriangular chambers of the final whorl visible on the umbilical side. interior of chambers with curved partitions that form secondary sutures at the contact with the outer wall on the umbilical side, one series of such sutures paralleling the periphery a short distance nearer the umbilicus. and another series crossing the apertural face a short distance above the base, intercameral sutures nearly straight, radial, and depressed, periphery rounded, peripheral outline entire: wall calcareous, perforate, surface smooth; primary aperture a low interiomarginal slit extending from the periphery nearly to the umbilicus. supplementary sutural openings on both spiral and umbilical sides and addi­tional supplementary openings at the contact of the internal partitions with the outer wall, both in the apertural face and paralleling the peripheral margin. M. Eocene (Lutetian): France: USSR: Ukraine.

 

Remarks: A lectotype (BMNH no. P41670) was designated for Discorbina rimosa Par­ker and Jones, from the Eocene of Haute­ville, France (Loeblich and Tappan. 1964. *1910, C594).