Paradamesites, Nishimura & Maeda, 2025

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 : 271-272

Genus Paradamesites nov.

ZooBank LSID: urn:lsid:zoobank.org:act:891736E2­4827­40AB­B0D9­631F181F53D0 .

Etymology: Form Greek para, parallel; parallel lineage of genus Damesites .

Type species: Ammonites sugata Forbes, 1846 , from South India, Coniacian or Santonian .

Species included: Paradamesites sugata ( Forbes, 1846) , P. compactus Hoepen, 1921 ), P. rabei ( Collignon, 1961) , P. tsianalokyensis ( Collignon, 1961) , and P. rectus sp. nov.

Diagnosis. —Superficially similar to Damesites but having single concave growth lines, much compressed whorls, an obtuse to acute keel, and a smaller whorl expansion rate. Shell surface is smooth throughout growth except for fine growth lines and periodic constrictions. Suture line is complex, bifid external lobe and trifid lateral, umbilical, and internal lobes.

Remarks. —Another lineage of Damesites ­like forms with concave growth lines is discriminated from the true Damesites . Newly established Paradamesites gen. nov., comprised P. sugata (originally Indian populations) and P. rectus gen. et sp. nov. In addition, this new genus includes numerous individuals which have previously been mistakenly assigned for their generic position to “ Damesites ”.

Stratigraphic and geographic range. —Middle Turonian– Campanian, Upper Cretaceous, African­Indian province, European province, north and south Pacific Realms.