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Yatenavis ieujensis

Reptilia

Discussion

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Taxonomy
Yatenavis ieujensis was named by Álvarez Herrera et al. (2023). Its type specimen is MPM-PV-23086, a limb element (distal end/half of a right humerus), and it is a 3D body fossil. Its type locality is La Anita, Yatenavis locality, which is in a Maastrichtian floodplain mudstone in the Chorrillo Formation of Argentina. It is the type species of Yatenavis.

Synonymy list
YearName and author
2023Yatenavis ieujensis Álvarez Herrera 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
subclassEureptilia()
—Romeriida
—Diapsida()
RankNameAuthor
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Theropoda()
—Neotheropoda
—AverostraPaul 2002
—Tetanurae
—Coelurosauria()
—Maniraptora
—Avialae
—Ornithothoraces
subclassEnantiornithes
genusYatenavis
speciesieujensis

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.

†Yatenavis ieujensis Álvarez Herrera et al. 2023
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Diagnosis
ReferenceDiagnosis
G. Álvarez Herrera et al. 2023A sparrow-sized enantiornithine that is distinguishable from other enantiornithines on basis of the unique combination of following characters: 1) humeral shaft narrow (less than half of the maximum width of the distal end of the humerus) and slightly bowed cranio-caudally; 2) dorsal supracondylar process prominent and slightly concave; 3) m. brachialis fossa wide, deep and proximally extended; medially positioned and laterally delimited by a ridge; 4) presence of a well-defined fossa proximal to the distal condyles, and dorsally separated from the m. brachialis fossa through a wide and prominent ridge; 5) presence of a craniocaudal ridge along the distal margin of the ventral condyle; 6) a D-shaped distal fossa delimited laterally by the ridge of the ventral condyle and separated from the olecranal fossa and 7) distal end of humerus almost perpendicular to the longitudinal axis of the bone.
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: solitaryo
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: carnivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:39:15
Modified: 2009-01-03 22:39:15
Source: subo = suborder, o = order
References: Marsh 1875, Benton 1983

Age range: Early/Lower Maastrichtian or 72.20000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian72.2 - 66.0Argentina (Santa Cruz) Yatenavis ieujensis (type locality: 230107)