1956  Cravenoceras (Richardsonites) Elias: 128.
     1962  Cravenoceras.- Osnovy: 375.
pars 1962  Eoasianites (Glaphyrites).- Kullmann: 303.
     1965  Cravenoceras.- Gordon: 205.
     1971  Richardsonites.- Ruzhentsev & Bogoslovskaia: 298.
     1999  Richardsonites.-Saunders & Work: 132.
     2000  Richardsonites.- Titus: 32.

Type species: Gastrioceras richardsonianum Girty, 1909, p.54 [OD].

A:   Conch large, subdiscoidal to pachycone, moderately evolute, umbilicus wide to moderately narrow; on early whorls
subdiscoidal and planorbiforme. No extended ophioconic stage.
D:   Usually up to five broad convex constrictions; ventral groove may be present.
G:   Median saddle higher than half the height of entire comparatively wide ventral lobe, its prongs being relatively wide.

[Type species lacking constrictions but possessing ventral groove].

[Titus, 2000, p.32: Short ophioconic and cadiconic phases (D < 15 mm) and adults (D > 30 mm) with U/D ratios 0.4 or
less and a wide ventral lobe (one-third to twice as wide as first lateral lobe or saddle) with swollen, bluntly pointed lobes.