1884 Homoceras Hyatt: 330.
1898 Glyphioceras.- Haug: 95.
1914 Homoceras.- Wedekind: 12.
1918 Homoceras.- Wedekind: 158.
1925 Homoceras.- Schmidt: 575.
1946 Homoceras.- Moore: 395.
1947 Pseudohomoceras Librovich: 61 [nom. nudum].
1957 Homoceras.- Treatise: L56.
1960 Homoceras.- Ruzhencev: 213.
1962 Homoceras.- Osnovy. 377.
1971 Homoceras.- Ruzhencev & Bogoslovskaya: 22.
1972 Homoceras.- Ramsbottom: 161 [ICZN proposal: Goniatites smithii Brown, 1841 as type species].
1972 Homoceras.- Ramsbottom: 218.
1977 Homoceras.- Ramsbottom: 288.
1978 Homoceras.- Ruzhencev & Bogoslovskaya: 196.
2001 Homoceras.-Titus & Manger: 21.
2008 Homoceras.-Nikolaeva: 56.

Original type species: Goniatites calyx Phillips, 1836, p. 236.

Type species: Goniatites smithii Brown, 1841, p.218 [SD ICZN 1976, Opinion 1061].

A: Conch subdiscoidal, widely to moderately umbilicate; early whorls evolute, wide and with low aperture, with sharp umbilical shoulder and wide umbilicus ("calyx" stage). Adult stages of some forms oxycone.
B: Transverse ornamentation coarse, lamellate, on immature stages almost linear, later with weakly pronounced ventrolateral salient and shallow ventral sinus.
G: Ventral lobe relatively wide, with sigmoidal sides; median lobe fairly low to half the height of entire ventral lobe. First lateral saddle well rounded, adventitious lobe wide and pointed.

(For discussion, see Moore, 1946, p.395; Ruzhencev & Bogoslovskaya, 1971, p.19-22).

[The original type, Goniatites calyx PHILLIPS, 1836, p.236, by monotypy, had been based on a very young and uncharacteristic shell; for discussion see Ramsbottom, 1971, p.161. - Pseudohomoceras was erected without any description; its type species was chosen as new type of Homoceras].

[Ruzhentsev & Bogoslovskaia, 1971, p 22 : Young shells subcadiconic, with sharp umbilical margin, adult shell oxyconic; calyx stage distinct. Whorls from completely involute and even overhanging to moderately involute in the terminal stage. Umbilicus strongly modified in the course of morphogenesis and narrow or moderately narrow and clearly stepped at the end of growth. Sculpure represented by more or less acute lamellae, simple or irregularly dichotomizing, forming a ventral sinus in adult specimens. An intraventral ridge is frequently noted in the early steges. Ventral lobe fairly broad (wl/hl >1, with cuneiform or lanceolate branches; median saddle fairly high (hs/hl = 0.60-0.80). Lateral lobe little different in length from ventral lobe.

Adult Homoceras shells are probably indistinguishable from adult Isohomoceras shells. In the early stages of morphogenesis the former are distinguished from the latter by the presence af a calyx stage, by the sharp umbilical shoulder, and broader umbilicus. In addition the ventral lobe is slightly broader in Homoceras and the lateral lobe is never particularly short; on the contrary, its depth in most species is the same as that of the ventral lobe.]

[Homoceratidae,
Ruzhentsev & Bogoslovskaia, 1978, p.188] Conch of early specimens sphaeroconic or cadiconic to pachyconic, adults mainly oxyconic, rarely pachyconic or subdiscoidal. Whorls moderately to completely involute, in some cases even hanging over previous whorl. Umbilicus moderately wide to very narrow. Transversal sculpture consisting of coarse lamellae or ribs, not rarely dichotomized, at adult conchs with ventral sinus. Very rare are lirae, and if preasent, only around the umbilicus. On early and middle whorls sometimes weak umnbonal tubercles, but also intraventral ridges (one to three) can be obsereved. Ventral lobe fairly wide (wl/hl > 1), median saddle fairly high (= 0.6 - 0.8).