[D] Ingenia yanshini (1) [Eg] [Su] [sG] [T]
Barsbold, 1981 (partim)
Cretaceous Late Campanian Maastrichtian
Saurischia Theropoda Tetanurae Coelurosauria Maniraptora Oviraptorosauria Ingeniidae
Barun Goyot Formation, Red Beds of Khermeen Tsav, [Hermiin Tsav] Omnogov, [Bugin-Tsav] Beds of Bugeen Tsav, Nemegt Formation, Nemegtskaya Svita, Bayankhongor, Mongolia
Genus - Typespecies - Skull - Eggs
Nests and embryos are known from this animal, which appear to have broaded their eggs like birds.
6 specimens, including skulls and complete postcrania. The skull lacks a crest and the skeleton is rather robust. In the hand the digits are short and subequal in length, and the first finger is robust with a large, massive and strongly curved claw. The second and third digits were succesively thinner and their claw-bearing unguals are only slightly curved. The ilium is shallow. The manual unguals are significantly longer than the corresponding penultimate phalanges, and lack posterodorsal lips above the articulations.
Oviraptorids with highly reduced, slightly curved and compressed unguals of the second and third fingers. Comparison: Ingenia is differentiated from Oviraptor by the high reduction, compression and straightness of the unguals of the second and third fingers.
Species named in honor of academician A. L. Yanshin.
GIN AN MNR, #100/30, lower jaw and in many respects full postcranial skeleton; upper Senonian, Barngoyotsk suite, (upper part), Hermintsav, Southwestern Mongolia.
Besides the holotype, remains of a skull and postcranial skeleton, four specimens (#100/30-100/33).
First metacarpal is almost twice as short as second and third, which consequently are highly reduced. In the tridactyl hand the second and third fingers are progressively shorter than the first and are much thinner, however the number of phalanges which compose it are fully preserved. In the distal direction these phalanges are shortened, but the unguals are insignificantly longer than the pre-claw ones. The ungual of the first finger is large, slightly 15 laterally compressed and curved, while in the second and third finger they are greatly reduced, narrow and more straight.
The considerable similarity with Oviraptor makes it unnecessary to repeat those features that they share in common in the structure of the skull and the postcranial skeleton of Ingenia, which were already described for the first species. In Ingenia the bones are differentiated by greater massivity, disproportional to their smaller size. The degree of preservation of the skull material does not allow one to judge concerning an osseous crest of Ingenia. Geologic age: Upper Senonian, Barungoyotsk suite (upper part). Location: Hermin-tsav, Southwestern Mongolia.
Source: Polyglot Paleontologist