Daptinus is an extinct genus of ichthyodectid fishes within the subfamily Saurodontinae, from the Late Cretaceous (Coniacian-Campanian) Niobrara Formation of Alabama, that was originally named as a species of Saurocephalus (S. phlebotomus) in 1870 by Edward Drinker Cope,Cope, E. D. (1870). On the Saurodontidæ. Proceedings of the American Philosophical Society 11:529-538IRMNG (2021). Daptinus Cope, 1873 †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=1391000 on 2021-01-14 and then became a species of Saurodon in 1871, but was moved to a separate genus in 1873.Cope, E. D. (1873). On two new species of Saurodontidae. Proceedings of the Academy of Natural Sciences of Philadelphia 25:2-339E. D. Cope. (1874). Review of the Vertebrata of the Cretaceous Period found west of the Mississippi River. Bulletin of the United States Geological and Geographical Survey of the Territories, First Series 2:3-48 Subsequent authors listed Daptinus as a tentative, possible synonym of Saurocephalus or Saurodon leanus.O. P. Hay. (1902). Bibliography and Catalogue of the Fossil Vertebrata of North America. Bulletin of the United States Geological Survey 179:1-868 The holotype, which is probably the only known specimen discovered to date, is AMNH 1906,Bardack, D. and Sprinkle, G. (1969). Morphology and relationships of saurocephalid fishes. Fieldiana Geology 16(12):297-340. which is listed as containing vertebrae (?) and portions of the cranium, the latter including the dentary, maxilla and palate.
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