pars 1943  Homoceras.-Bisat & Hudson: 405,
pars   ----    Reticuloceras.-Bisat & Hudson: 411.
pars 1943  Homoceras.-Hudson & Cotton
pars 1966  Reticuloceras.-Quinn: 13.
pars 1978  Reticuloceras.-Ruzhentsev & Bogoslovskaia: 275.
        1993  Reticuloceras (Swintoceras) Saunders & Ramsbottom: 995.

Type species: Homoceras spiraloides Bisat & Hudson, 1943, p.407 [OD].

[For discussion see SAUNDERS & RAMSBOTTOM, 1993, p.995]. Two subgenera: Reticuloceras (Reticuloceras)
BISAT, 1924 and  Reticuloceras (Swintoceras) SAUNDERS & RAMSBOTTOM, 1993.

Reticuloceras Bisat,1924: Type species: Goniatites reticulatus Phillips, 1836, p.235 [OD].
A:   Conch form involute, with narrow, in some forms very narrow umbilicus (relation of width of umbilicus/diameter
       0.25 - 0.15, average 0.18).
B:   Sculpture consisting of transverse growth striae, sometimes crenulate, with ventrolateral salient and ventral sinus,
      crossed by fine spiral lirae thus producing reticulate ornamentation.
C:   Small ribs near the umbilicus and faint umbilical nodes common at early whorls.
D:   Constrictions may be present, but no ventrolateral furrows.
G:   Ventral lobe rather wide, with almost parallel sides; median saddle reaching half the height of entire ventral lobe.
       Adventitious lobe as wide and deep as ventral lobe.

Reticuloceras (Reticuloceras):
B:   Sculpture consisng of reticulate ornamentation, at least on early stages.
C:   Small riblets near the umbilicus; faint umbilical nodes common at earlier whorls.

Reticuloceras (Swintoceras):
B:   Reticulate ornamentation weakly developed. Noncrenulate to crenulate transverse striae linked by faint spiral lirae.
C-D: Umbilical nodes and constrictions may be present.
G:   Ventral lobe with narrow prongs which tend to be swollen.

Phillipsoceras Ruzhentsev & Bogoslovskaia,1978. (Type species: Goniatites (Beyrichoceras) circumplicatile Foord, 1903)
A:   Conch form with wide, in some forms moderately wide umbilicus (relation of width of umbilicus to diameter about 0.5 - 0.3).
       Some species with tendency to form oxycone venter.
C:   Small rather strong ribs near the umbilicus; umbilical nodes at early whorls.
G:   Adventitious lobe wider than ventral lobe.

Saunders & Ramsbottom, 1993, p.995:
    Diagnosis.-Reticuloceratid with a compressed shell (W/D ca. 0.65), small to moderate umbilicus (U/D ca. 0.30),
venter may be acute in gerontic individuals; ornament of noncrenulate to crenulate radial striae which may be linked
by concentric striae, constrictions frequently developed, strongest in ventro-lateral region; urnbilical nodes may be
present in early whorls;sutural outline includes wide ventral lobe and narrow ventral prongs which tend to be swollen
and may be slightly splayed.

Fig. see TAX5679, 1: R.S.spiraoides, 2,3: R.S. tiro, 4, 5: R.S. wainwrighti.