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Baiyinosaurus baojiensis

Reptilia

Taxonomy
Baiyinosaurus baojiensis was named by Li et al. (2024). It is not extant. Its type specimen is IVPG-D021, a partial skeleton. Its type locality is Pinchuan, Baiyin City, which is in a Bathonian lacustrine deltaic sandstone in the Wangjiashan Formation of China. It is the type species of Baiyinosaurus.

Synonymy list
YearName and author
2024Baiyinosaurus baojiensis Li et al.

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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
RankNameAuthor
subclassEureptilia()
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
Genasauria
Thyreophora()
Stegosauria()
genusBaiyinosaurus
speciesbaojiensis

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.

Baiyinosaurus baojiensis Li et al. 2024
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Diagnosis
ReferenceDiagnosis
N. Li et al. 2024Baiyinosaurus differs from all other stegosaurs by possession of the following autapomorphy: the frontal is wider than long (score 1 for character 32), and not only contributes to the medial margin of the supratemporal fenestra but also makes up a very great contribution to the anterior margin of the supratemporal fenestra. Baiyinosaurus also possesses the following character combination on dorsal vertebrae: (1) the neural arches are not greatly elongated dorsally: the ratio of neural arch height to neural canal height is 1.59 (character 6, a continuous character); (2) the parapophyses are well developed and project somewhat laterally on stalks in anterior view (score 0 for character 64); (3) the neural spines are anteroposteriorly broad and axially expanded in lateral view: the ratio of neural spine length (measured at the base) to centrum length is 0.75 (character 9, a continuous character).
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2004-12-14 12:50:52
Modified: 2004-12-14 14:50:52
Source: o = order
Reference: Marsh 1875

Age range: Late/Upper Bathonian or 167.70000 to 164.70000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Bathonian167.7 - 164.7China (Gansu) Baiyinosaurus baojiensis (type locality: 235625)