A Complete Specimen of Mystriosuchus (Reptilia, Phytosauria) From the Norian (Late Triassic) of Lombardy (Northern Italy)

Gozzi, Emanuele; Renesto, Silvio

doi:10.13130/2039-4942/5518

Rivista Italiana Di Paleontologia E Stratigrafia 2003

DOI: 10.13130/2039-4942/5518

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A Complete Specimen of Mystriosuchus (Reptilia, Phytosauria) From the Norian (Late Triassic) of Lombardy (Northern Italy)

Emanuele Gozzi¹,

Silvio Renesto²

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Heteropelta boboi n. gen., n. sp. an armored archosauriform (Reptilia: Archosauromorpha) from the Middle Triassic of Italy

Vecchia¹

2021

PeerJ

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Heteropelta boboi is a new archosauriform reptile from the upper Anisian of northeastern Italy represented by a fragment of dorsal armor with a row of neural arches of the dorsal vertebrae. The dorsal armor of the new taxon is composed of two columns of paramedian osteoderms and at least six columns of lateral osteoderms. Unlike other armored archosaurs, the osteoderms are imbricated with the posterior osteoderm overlapping the anterior one. The low neural arches bear small neural spines and long postzygapophyses. The osteoderms of the lateral columns increase in size and change in shape from the most medial to the most lateral columns. Among the Archosauriformes, only the non-archosaur proterochampsians Vancleavea campi, Litorosuchus somnii, and the doswelliids have dorsal armor comprised of more than two columns of osteoderms per side, but the morphology and arrangement of their osteoderms is unlike those of the new Italian taxon. A cladistic analysis of Archosauromorpha positions Heteropelta boboi as either a basal phytosaur or a basal suchian. However, a second cladistic analysis focused on armored archosaurs alternatively positions the new taxon as a basal archosauriform, basal suchian, basal loricatan or crocodylomorph. Better resolution of the phylogenetic relationships of Heteropelta boboi will likely be obtained only with the discovery of cranial and postcranial remains associated with its diagnostic armor elements.

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Heteropelta boboi n. gen., n. sp. an armored archosauriform (Reptilia: Archosauromorpha) from the Middle Triassic of Italy

Vecchia¹

2021

PeerJ

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A Complete Specimen of Mystriosuchus (Reptilia, Phytosauria) From the Norian (Late Triassic) of Lombardy (Northern Italy)

Cited by 1 publication

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Heteropelta boboi n. gen., n. sp. an armored archosauriform (Reptilia: Archosauromorpha) from the Middle Triassic of Italy

Heteropelta boboi n. gen., n. sp. an armored archosauriform (Reptilia: Archosauromorpha) from the Middle Triassic of Italy

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