PARAENDOTHYRA Chernysheva, 1940

 

 

Type species: Paraendothyra nalivkini Chernysheva, 1940; OD.

Paraendothyra Chernysheva, 1940 (*581), p. 129.

Test large, up to 1.2 mm in diameter, enrolled and biumbilicate, with broadly rounded periphery, early stage with slight variations in plane of coiling, later nearly completely planispiral, chambers inflated, sutures radial; wall cal­careous, microgranular with calcite inclusions, single layered, with supplementary deposits at the angular base of the apertural face resulting in a much thickened wall, so that in section the supplementary deposits and parts of the septa against the previous whorl give a serrate appearance, final few septa hooklike as viewed in section; aperture areal, a lunate slit in the apertural face. L. Carboniferous (M. Tournaisian): USSR: southern Urals.