1978  Eogonioloboceratidae Ruzhentsev & Bogoslovskaia: 83.

A:   Conch form subdiscoidal, evolute on early whorls; umbilicus
of adult forms very narrow.
B:   No prominent sculpture.
D,F: Spiral ornamentation and constrictions may be present.
G:   Ventral lobe wide, with strongly divergent sides; median
saddle broad and half as high as entire ventral lobe, also with
strongly divergent sides. First lateral saddle narrowly rounded,
subacute or acute, adventitious lobe pointed.

[Similar to Gonioloboceratidae, but phylogenetic relationship
improbable].