1978 Longmenshanoceras Zhao, Liang & Zheng: 150, 182.
     2002  Tapashanoceras.-Leonova: S101.

Type species: Longmenshanoceras plicatum Zhao, Liang & Zheng, 1978, p.150; OD.

[Zhao et al., 1978]:Shell widely umbilicate, thinly discoidal, with rectangular whorl section. Venter narrowly arched or
fastigate with medial keel. Sides strongly flattened smooth or ornamented with fine plications on the inner whorls, marked
by forward inclining and slightly curving plications on the outer whorls, ending on the ventrolateral shoulders without
terminal nodes. Umbilicus wide and shallow. Suture line ceratitic, with the outer saddle much lower than other saddles.