Genus: Cimoliornis OWEN, 1846
Etymology: Greek, kimola, “white earth (Cretaceous)”, and Greek, ornis (Masculine), "bird."

Species: diomedius (OWEN, 1844) OWEN, 1846 (nomen dubium)
Etymology: Greek, Diomedes, a Greek Hero.
= Osteornis diomedius OWEN, 1844 (nomen dubium)
= Ornithocheirus? diomedius (OWEN, 1844) LYDEKKER, 1888 (nomen dubium)
= Ornithochirus diomedius (OWEN, 1844) LYDEKKER, 1888 (sic)
= Pterodactylus diomedius (OWEN, 1844) OWEN, 1851 (nomen dubium)

Holotype: NMHUK PV (old BMNH) 39418

Locality: Chesteron, Cambridgeshire County (Turon, Kent County?), England, Southern United Kingdom.

Horizon: Chalk Formation (Middle Chalk).

Biostratigraphy:

Age: Cenomanian-Turonian Stage, Upper Gallic Subepoch, Lower Gulf Epoch, Middle-Late Cretaceous.

Material:

Material: Wing finger metacarpal.

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