TRICHOHYALUS Loeblich and Tappan, 1953
Type species: Discorbis bartletti Cushman, 1933 (*773), p. 6; OD.
Trichohyalus Loeblich and Tappan. 1953(*1887), p. 116.Test trochospiral, planoconvex, spiral side evolute, about nine or ten chambers in the final whorl, sutures depressed, radial. and gently curved, umbilical side involute, periphery rounded, peripheral outline moderately lobulate; wall calcareous, optically granular, coarsely perforate, umbilical side radially finely striate and pustulose, the later lamellae forming a vesicular plate over most of the umbilical surface, perforations through the plate opening into the cavity beneath; no extemal aperture apparent, but dissection shows an interiomarginal intercameral foramen on the umbilical side near the outer margin of the chambers. Pleistocene to Holocene; Arctic Canada; USSR: Northeast Taymyr Peninsula.