New material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities

@article{Romano2017NewMO,
  title={New material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities},
  author={Marco Romano and Ausonio Ronchi and Simone Maganuco and Umberto Nicosia},
  journal={Palaeontologia Electronica},
  year={2017}
}
New characters of the giant caseid Alierasaurus ronchii are described here based on material recovered from the type locality in the Permian deposits of Cala del Vino Formation (Sardinia NW) and additional preparation of the previously collected material. All new described osteological elements are characterized by the same state of preservation and, given the absence of double elements and the total compatibility in absolute size, the new material can be attributed without doubt to the… Expand
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References

SHOWING 1-10 OF 48 REFERENCES
Alierasaurus ronchii, gen. et sp. nov., A Caseid from the Permian of Sardinia, Italy
ABSTRACT A giant caseid, Alierasaurus ronchii, gen. et sp. nov., is herein described, based on a partial postcranial skeleton collected from the Permian Cala del Vino Formation (Alghero, Nurra,Expand
Cranial Anatomy of Ennatosaurus tecton (Synapsida: Caseidae) from the Middle Permian of Russia and the Evolutionary Relationships of Caseidae
TLDR
Phylogenetic analysis of Caseidae yields a single most parsimonious tree and its topology reveals that the pattern of dental complexity in terms of the number of apical cuspules is homoplasious, cautioning against its use as a unidirectional phylogenetic character. Expand
Callibrachion and Datheosaurus, Two Historical and Previously Mistaken Basal Caseasaurian Synapsids from Europe
TLDR
New observations on Datheosaurus and Callibrachion provide new insights into the early diversification of caseasaurs, reflecting an evolutionary stage that lacks spatulate teeth and broadened phalanges that are typical for other caseid species. Expand
A phylogeny of Plesiosauria (Sauropterygia) and its bearing on the systematic status of Leptocleidus Andrews, 1922
TLDR
A cladistic analysis including Leptocleidus and a new, apparently morphologically similar specimen from Alberta, was undertaken to assess their phylogenetic position within Plesiosauria, and results indicate a basal dichotomous split into the traditionally recognized pliosauroidea and plesiosauroid clades. Expand
A new large caseid (Synapsida, Caseasauria) from the Permian of Rodez (France), including a reappraisal of “Casea” rutena Sigogneau-Russell & Russell, 1974
ABSTRACT The description of a new large caseid, Ruthenosaurus russelbrum n. gen., n. sp. from the Early Permian (upper Cisuralian to lower Lopingian) of the Rodez Basin, France, is based on a partialExpand
Cladistic analysis of Caseidae (Caseasauria, Synapsida): using the gap‐weighting method to include taxa based on incomplete specimens
TLDR
A phylogenetic analysis of the Caseidae group is presented, using gap weighting to include poorly known taxa and characters, and the utility of the postcranial skeleton in understanding relationships among basal synapsids is highlighted. Expand
New Postcranial Material of the Early Caseid Casea broilii Williston, 1910 (Synapsida: Caseidae) with a Review of the Evolution of the Sacrum in Paleozoic Non-Mammalian Synapsids
TLDR
It is argued that this repeated acquisition of a three-vertebra sacrum in early synapsids was related to more efficient terrestrial locomotion than to increased weight bearing, suggesting that it was not an adaptation to heavy weight bearing. Expand
Dimetropus osageorum n. isp. from the Early Permian of Oklahoma (USA): A Trace and its Trackmaker
A new ichnospecies is named as Dimetropus osageorum n. isp. within the ichnogenus Dimetropus Romer and Price, 1940. The new ichnotaxon comes from the Lower Permian Midco Member of the WellingtonExpand
Eothyris and Oedaleops: Do These Early Permian Synapsids from Texas and New Mexico form a Clade?
TLDR
Although they appear relatively late in synapsid evolution, both eothyridids are significantly older than all other caseasaurs, forcing the establishment of a long unrecorded lineage for caseids. Expand
A Huge Caseid Pelycosaur from North-Western Sardinia and Its Bearing on European Permian Stratigraphy and Palaeobiogeography
Skeletal remains, some loose on the surface and others still embedded, have been recovered from the uppermost part of an outcrop of the Permian Cala del Vino Formation located near Torre delExpand
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