Damesites Matsumoto, 1942a

Nishimura, Tomohiro & Maeda, Haruyoshi, 2025, Taxonomy and paleobiogeography of some Late Cretaceous desmoceratine ammonoids from the northwest Pacific province, Acta Palaeontologica Polonica 70 (2), pp. 259-283 : 262

Genus Damesites Matsumoto, 1942a

Type species: Desmoceras damesi Jimbo, 1894 , by original designation of Matsumoto (1942a). Tappu area, Hokkaido, Japan, probably Santonian, a float.

Species included: Damesites damesi ( Jimbo, 1894) and Damesites hetonaiensis Matsumoto, 1954 .

Emended diagnosis. —Desmoceratine having sigmoidal growth lines, crater­like narrow umbilicus, very sharp or moderate to obtuse ventral keel in the adult stage. Single concave or weakly sigmoidal constrictions develop particularly in the early to middle growth stages.

Remarks.— Damesites Matsumoto, 1942a: 24 ( 1938: 193, nom. nud.), ICZN Opinion 555, 1959, Generic Name No. 1349.