Dinogymnium assamicum Jain et al., 1975

Holotype: Jain et al., 1975 pl.2, fig.28
Now Alisogymnium. Originally Dinogymnium, subsequently (and now) Alisogymnium.
Tax. jr. synonym of Dinogymnium sphaerocephalum (Vozzhennikova, 1967) Lentin and Williams, 1973, according to Jain, 1977. Lentin and Vozzhennikova, 1990, retained Dinogymnium (as Alisogymnium) assamicum as a separate species.
Holotype: Jain, Sah and Singh, 1975, pl.2, fig.28
Locus typicus: Assam, India
Stratum typicum: Maastrichtian

Original diagnosis: Jain, Sah and Singh, 1975, p.4
Shell oblong, poles broadly rounded, sides convex, epitheca slightly longer than hypotheca. Cingulum broad, deep, circular. Hypotheca bowl shaped without longitudinal ribs. Epitheca conical, longitudinal ribs few, distantly placed, broad, with straight to undulating margin; surface granulate. Archaeopyle apical.

Dimensions:HolotypeRange
Length of shell60 Ám50-60 Ám
Width of shell50 Ám45-50 Ám
Width of cingulum11 Ám8-11 Ám
Cingulum index5050-57