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Sphenosiagon simplex

Osteichthyes - Teiidae

Taxonomy
Sphenosiagon simplex was named by Gao and Fox (1991). Its type specimen is UALVP 29742, a mandible (a fragmentary left mandible having splenial firmly articulated with the dentary, and having eight posterior teeth and the base of the last dentary tooth), and it is a 3D body fossil. Its type locality is Irvine microvertebrate site, which is in a Judithian terrestrial horizon in the Dinosaur Park Formation of Canada. It is the type species of Sphenosiagon.

Synonymy list
YearName and author
1991Sphenosiagon simplex Gao and Fox pp. 150-152 fig. 3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Squamata()
—Episquamata
superfamilyLacertoideaCamp 1923
—Teiioidea
familyTeiidaeGray 1827
genusSphenosiagon
speciessimplex

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.

†Sphenosiagon simplex Gao and Fox 1991
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Diagnosis
ReferenceDiagnosis
K. -Q. Gao and R. C. Fox 1991Differing from other known teiids, including Lancian Chamops segnis, in having the unique combination of the following characters: dentary slender, lightly built, and wedge-shaped; subdental shelf narrow; sulcus dentalis poorly defined; teeth unicuspid; tooth attachment subpelurodont, with lateral parapet about half of crown height.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialuc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: insectivoref
Diet 2: carnivoref
Created: 2005-09-05 19:44:41
Modified: 2005-09-05 21:44:41
Source: f = family, c = class, subp = subphylum, uc = unranked clade
References: Hendy et al. 2009, Kiessling 2004, Behler and King 1979, Carroll 1988

Age range: base of the Late/Upper Santonian to the top of the Late/Upper Campanian or 85.70000 to 72.20000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Santonian85.7 - 83.6Canada (Alberta) Sphenosiagon simplex (14425)
Judithian83.6 - 72.2Canada (Alberta) Sphenosiagon simplex (type locality: 14463)
Middle Campanian - Late/Upper Campanian83.6 - 72.2Canada (Alberta) Sphenosiagon simplex (116538)