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Convolosaurus marri

Reptilia

Taxonomy
Convolosaurus marri was named by Andrzejewski et al. (2019). Its type specimen is SMU 72834, a partial skeleton (skull and partial articlulated skeleton with 9 cervica vertebrae; 15 dorsal vertebrae; 6 sacral vertebrae; 23 caudal vertebrae; R & partial L scapula; R & parti), and it is a 3D body fossil. Its type locality is North Quarry/Camp Quarry, Proctor Lake Dinosaur Locality (SMU 001), which is in an Aptian floodplain claystone/siltstone in the Twin Mountains Formation of Texas. It is the type species of Convolosaurus.

Synonymy list
YearName and author
2019Convolosaurus marri Andrzejewski et al. p. 5
2020Convolosaurus marri Dieudonné et al.
2020Convolosaurus marri Dieudonné et al. p. 411

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
genusConvolosaurus
speciesmarri

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.

†Convolosaurus marri Andrzejewski et al. 2019
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Diagnosis
ReferenceDiagnosis
K. A. Andrzejewski et al. 2019The presence of four premaxillary teeth with proximodistally oriented sulcus on the buccal surface distinguishes Convolosaurus marri gen. et sp. nov. from all other ornitho- pods. Further, it can be distinguished from other basal ornithopods by a unique combination of primitive and derived character states. Primitive character states include the presence of premaxillary teeth and two supraorbitals that extend across the entire orbit. Derived character states include: curved maxillary tooth roots; opisthocoelous cervical vertebrae; sacral neural spines twice the height of the sacral centra; proximal caudal neural spines 1.5 times the height of the centrum; expanded ischial ‘foot’; shallow intercondylar groove on the anterior surface of the femur; and a laterally compressed prepubic process.