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Irisosaurus yimenensis

Reptilia

Taxonomy
Irisosaurus yimenensis was named by Peyre de Fabrègues et al. (2020). It is not extant. Its type specimen is CVEB 21901, a partial skeleton. Its type locality is Jiaojiadian area B, near Zhanmatian village, which is in a Pliensbachian terrestrial siltstone in the Fengjiahe Formation of China.

Synonymy list
YearName and author
2020Irisosaurus yimenensis Peyre de Fabrègues et al.
2021Irisosaurus yimenensis Peyre de Fabrègues et al. p. 324
2022Irisosaurus yimenensis Yao et al. p. 4

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Saurischia()
—Eusaurischia
—Sauropodomorpha(Huene 1932)
—Massopoda
—Sauropodiformes
genusIrisosaurus
speciesyimenensis

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Irisosaurus yimenensis Peyre de Fabrègues et al. 2020
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Diagnosis
ReferenceDiagnosis
C. Peyre de Fabrègues et al. 2020A small sauropodiforme distinguished from other non-sauropodan sauropodomorphs based on the following unique combination of character states (autapomorphies marked with a *): scarce and small nutrient foramina on the lateral surface of the maxilla, large and deep neurovascular foramen in the perinarial fossa*, deep perinarial fossa defined by a sharp rim*, premaxillary ramus of the maxilla higher than long prior to the nasal process*, lack of antorbital fossa (associated with the presence of a medial lamina), teeth lacking denticles (convergence with Yunnanosaurus huangi3, 14), strongly asymmetrical proximal half of metacarpal V*.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Created: 2017-04-17 15:16:03
Modified: 2017-04-17 15:16:03
Source: subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Hendy et al. 2009

Age range: Pliensbachian or 192.90000 to 184.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Pliensbachian192.9 - 184.2China (Yunnan) Irisosaurus yimenensis (type locality: 211303)