Beyrichoceras is a genus belonging to the goniatitid family Muensteroceratidae,[1] a group of ammonoids, extinct shelled cephalopods related to belemnites and recent coleoids and more distantly to the nautiloids Beyrichoceratoides has a smooth involute discoidal shell with a very narrow umbilicus, non-crenulate biconvex growth lines, and well-developed ventro-lateral salients and deep hyponomic sinus.

[2] The ventral lobe of the suture is moderately narrow and straight sided; bifurcated with short prongs separated by a low median saddle.

[3] Beyrichoceratoides was derived from Muensteroceras near the beginning of the Carboniferous (early Mississippian)[4] and is included in the Muesteroceratidae, a family assigned to the Goniatitid superfamily Pericyclaceae.

[2] Schindewolf, 1951, considered Beyrichoceratoides equivalent to Münsteroceras Hyatt 1884 as also presented in the Treatise Part L, 1957.

[1] However, its somewhat globular discoidal form suggest a small stalking or hovering nektonic or nekto-benthic ambush predator capable of sudden swift movements to either grab prey or escape predation.