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Alierasaurus
Taxonomy
Alierasaurus was named by Romano and Nicosia (2014). Its type is Alierasaurus ronchii.
It was assigned to Caseidae by Romano and Nicosia (2014).
It was assigned to Caseidae by Romano and Nicosia (2014).
Species
A. ronchii (type species)
Synonymy list
Year | Name and author |
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2014 | Alierasaurus Romano and Nicosia p. 902 figs. FIgs. 2-11 |
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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
Reference | Diagnosis | |
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M. Romano and U. Nicosia 2014 | Large 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.
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Measurements
No measurements are available
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Source: c = class, subp = subphylum, uc = unranked clade | |||||
References: Carroll 1988, Hendy et al. 2009 |
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Kungurian - Roadian | Italy (Sassero) | Cotylorhynchus sp. (161206) |