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Convolosaurus marri

Osteichthyes - Tenontosauridae

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
2025Convolosaurus marri Czepiński and Madzia p. 13

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
—Romeriida
RankNameAuthor
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Genasauria
—Cerapoda
—Ornithopoda()
—Clypeodonta
—Iguanodontia()
—Rhabdodontomorpha
familyTenontosauridae
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.
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:40:05
Modified: 2009-01-03 22:40:05
Source: subo = suborder, o = order
References: Marsh 1875, Benton 1983, Kiessling 2004

Age range: Late/Upper Aptian or 119.57000 to 113.20000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Aptian119.57 - 113.2USA (Texas) Hypsilophodon sp. (type locality: 22713)