1831  Gyroceratites von Meyer: 73.
     1835  Gyroceratites.- Bronn: 102.
     1882  Aphyllites.- von Mojsisovics: 18.
     1884  Mimoceras.- Hyatt: 309.
     1931  Mimoceras.- Eichenberg.- 181.
     1933  Gyroceratites.- Schindewolf: 75.
     1948  Gyroceratites.- Teichert: 65.
     1953  Gyroceratites.- Erben: 182.
     1957  Gyroceratites.- Treatise: L29.
     1960  Gyroceratites.- Ruzhentsev: 169.
     1960  Gyroceratites.- Erben: 75.
     1962  Gyroceratites.- Osnovy: 336.
     1962  Gyroceratites.- Walliser: 566.
     1964  Gyroceratites.- Erben: 151, 202.
     1966  Gyroceratites.- Babin: 354.
     1969  Gyroceratites.- Bogoslovskii: 134.
     1983  Gyroceratites.- Chlupac & Turek: 75.
     2001  Gyroceratites.- Klug: 500.
     2002  Gyroceratites.-Korn & Klug: 63.

Type species: Goniatites gracilis Bronn, 1835, p. 102.

[Chlupac & Turek, 1983, p.75: Shell advolute, narrowly discoidal, without imprint zone; strongly compressed in later growth stages. Ventral side flattened and delimited by ventrolateral angles or lamellae. Rather widely spaced growth lines show broad lateral lobe, sharply angulate ventrolateral salient, and lanceolate ventral sinus. Suture with rounded dorsal lobe, broad almost symmetrical lateral lobe and narrow ventral lobe. Embyonal shell incompletely coiled, without growth lines. Protoconch small, only slightly curved, broadly ovoid in sharp; umbilical perforation large.]

Klug, 2001, p.500: Conch of small size, advolute; without imprint zone. Whorl cross section subcircular in early growth stages, later elliptical. External side flat, bordered against the rounded flanks by ventrolateral angles or lamellae. Umbilicus moderately wide to wide, moderately large umbilical window. Small, slightly curved protoconch (0.8 to 1.1 mm long). Moderately high to high whorl expansion rate (2.0 to 2.5). Ornament with widely spaced prorsiradiate and concavo-convex growth lines with broad and shallow lateral sinus, sharply angular ventrolateral salient, and a U-shaped external sinus. Suture line without or with a shallow external lobe, broad and shallow lateral lobe, and rounded internal lobe or saddle; septa dorsoventrally and laterally bent, without lateral inflexions.

Comparisons (Klug, 2001, p.500): Gyroceratites VON MEYER 1831 is the only genus within the Mimoceratidae STEINMANN 1890 which has very high ventrolateral projections and very deep ventral sinuses in the growth lines. Such a growth line course is also unknown from both the Mimosphinctidae ERBEN 1953 and the Teicherticeratidae BOGOSLOVSKY 1969.

A:   Conch advolute.
B:   High ventrolateral salient.