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Baminornis zhenghensis

Reptilia

Taxonomy
Baminornis zhenghensis was named by Chen et al. (2025). Its type specimen is IVPP V33259, a partial skeleton, and it is a 3D body fossil. Its type locality is near Yangyuan Village, Zhenghe, which is in a Kimmeridgian/Tithonian mire/swamp mudstone/tuff in the Nanyuan Formation of China. It is the type species of Baminornis.

Synonymy list
YearName and author
2025Baminornis zhenghensis Chen et al. p. 441 figs. Fig. 1-3

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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()
—Romeriida
RankNameAuthor
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
—Maniraptora
—Avialae
genusBaminornis
specieszhenghensis

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.

†Baminornis zhenghensis Chen et al. 2025
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Diagnosis
ReferenceDiagnosis
R. Chen et al. 2025Baminornis is distinguishable from all other avialans in the following combination of character states (*denotes probable autapomorphy): fused pygostyle that curves dorsally and is longer than metacarpal II (the three manual digits of maniraptorans are here described as I, II and III, following a previous study28)*; strut-like coracoid that is separated from the scapula; boomerang-shaped furcula with an interclavicular angle of 65°; semilunate carpal that has no contact with metacarpal III; metacarpal I that has an asymmetric ginglymoid distal articulation with enlarged medial condyle*; metacarpal III that extends further distally than metacarpal II; manual phalangeal formula 2-3-4; elongate manual phalanx I-1 1.4× longer than manual phalanx II-1; ungual of manual digit I twice as large as that of digit III*; manual digit III that has four phalanges and is shorter than metacarpal III; and ischium that lacks both the obturator and posterior processes*.