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Alnashetri cerropoliciensis

Reptilia - Alvarezsauridae

Taxonomy
Alnashetri cerropoliciensis was named by Makovicky et al. (2012). Its type specimen is MPCA-477, a set of postcrania, and it is a 3D body fossil. Its type locality is La Buitrera (Hoyada de los esfenodontes), which is in a Cenomanian crevasse splay sandstone in the Candeleros Formation of Argentina.

Synonymy list
YearName and author
2012Alnashetri cerropoliciensis Makovicky et al. pp. 90-91 figs. 2-8
2013Alnashetri cerropoliciensis Novas et al. p. 188
2016Alnashetri cerropoliciensis Canale et al. p. 27
2016Alnashetri cerropoliciensis Makovicky et al. p. 62
2017Alnashetri cerropoliciensis Gianechini et al. p. 1

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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()
infraorderAlvarezsauria
—Alvarezsauroidea()
familyAlvarezsauridae
genusAlnashetri
speciescerropoliciensis

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.

†Alnashetri cerropoliciensis Makovicky et al. 2012
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Diagnosis
ReferenceDiagnosis
P. J. Makovicky et al. 2012A small non-avian coelurosaur exhibiting the following two autapomorphies: presence of a low ridge on the distal end of the tibia, which separates the rostral surface for articulation with the astragalus from the outer face of the lateral malleolus, and which extends up the shaft of the tibia dorsal to the tip of the ascending process of the astragalus. Small notches extending ventrally from the collateral ligament pits at the base of the distal articular hemicondyles on phalanges III-2 and III-3 appear to be unique to Alnashetri among described non-avian theropods.
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 Cenomanian or 99.60000 to 93.50000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Cenomanian99.6 - 93.5Argentina (Río Negro) Alnashetri cerropoliciensis (206599 type locality: 225915)