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Alierasaurus

Caseidae

Taxonomy

Species
A. ronchii (type species)

Synonymy list
YearName and author
2014Alierasaurus Romano and Nicosia p. 902 figs. FIgs. 2-11

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
RankNameAuthor
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Caseasauria()
familyCaseidae
genusAlierasaurus

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.

G. †Alierasaurus Romano and Nicosia 2014
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Alierasaurus ronchii Romano and Nicosia 2014
Diagnosis
ReferenceDiagnosis
M. Romano and U. Nicosia 2014Large caseid with an overall size comparable to that of Cotylorhynchus hancocki, and characterized by the following autapomorphies: metatarsal IV with distinct axial region, length about twice that of the corresponding proximal phalanx, not short and massive as in other large caseids; metatarsal IV proximal head not orthogonal to the bone axis, forming an an- gle of 120◦ with the shaft: with this conformation, the proximal and distal heads are much closer along the medial side of the metatarsal; claw-shaped ungual phalanges proportionally shorter than in Cotylorhynchus, with a double ventral flexor tubercle very close to the proximal rim of the phalanx; ungual phalangeal axis bent downward and medially; distal transverse section subtriangular, not spatulate as in Cotylorhynchus.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: c = class, subp = subphylum, uc = unranked clade
References: Carroll 1988, Hendy et al. 2009

Age range: base of the Kungurian to the top of the Roadian or 279.30000 to 268.80000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Kungurian - Roadian279.3 - 268.8Italy (Sassero) Cotylorhynchus sp. (161206)