pars 1924  Homoceras.-Bisat: 102.
     1946  Hudsonoceras Moore: 433.
     1957  Girtyoceras.- Treatise: L59.
pars 1959  Hudsonoceras.- Patteisky: 11.
     1960  Hudsonoceras.- Ruzhencev: 204.
     1962  Hudsonoceras.- Osnovy: 369.
     1965  Hudsonoceras.- Patteisky: 5.
     1968  Hudsonoceras.- Quinn & Saunders: 397.
     1978  Hudsonoceras.- Ruzhentsev & Bogoslovskaia: 134.

Type species: Goniatites Proteus Brown, 1841, p.217 [OD].

A:   Conch form discoidal, evolute on early stages, later with narrow umbilicus. Sculpture consisting of delicate spiral
ornamentation and transverse striae; crossing of both produces reticulate pattern.
E:   Ventro-lateral grooves may be present.
G:   Ventral lobe wide, with relatively low median saddle; first lateral saddle rounded. Adventitious lobe deep and acute.

[Phylogenetic relationship uncertain, assignment to Girtyoceratidae tentative Some authors (e.g. Ruzhentsev & Bogoslovskaia, 1978, p.134) assign Hudsonoceras to superfamily Nomismocerataceae, family Nomismoceratidae].