ORTHELLA E. V. Bykova, 1956
Type species: Orthella paalzowi E. V. Bykova, in Kiparisova et al., 1956; OD.
Orthella E. V. Bykova, in Kiparisova et al., 1956 ( *1689), p. 19.
Test elongate, globular proloculus followed by streptospirally enrolled undivided tubular second chamber, no true chambers but tube may be alternately wider and narrower, enrolled portion somewhat elongate as in Agathammina, later uncoiling and rectilinear, tapering toward the aperture; wall calcareous, imperforate; aperture simple, rounded, terminal. U. Triassic (Rhaetian) to U. Jurassic (U. Oxfordian); USSR; Austria.