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Alierasaurus ronchii
Taxonomy
Alierasaurus ronchii was named by Romano and Nicosia (2014). Its type specimen is MPUR NS 151, a partial skeleton, and it is a 3D body fossil. Its type locality is Promontory of Torre del Porticciolo, which is in a Kungurian/Roadian wet floodplain mudstone in the Cala del Vino Formation of Italy. It is the type species of Alierasaurus.
Synonymy list
| Year | Name and author |
|---|---|
| 2014 | Alierasaurus ronchii 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.
†Alierasaurus ronchii Romano and Nicosia 2014
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| 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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