- Tsagantegia
Taxobox
name = "Tsagantegia"
fossil_range =Late Cretaceous
regnum =Animal ia
phylum = Chordata
classis = Sauropsida
superordo =Dinosaur ia
ordo =Ornithischia
subordo =Thyreophora
infraordo =Ankylosauria
familia =Ankylosauridae
genus = "Tsagantegia"
genus_authority=Tumanova, 1993
subdivision_ranks=Species
subdivision=
*"T. longicranialis" Tumanova, 1993 (type)"Tsagantegia" (Tumanova, 1993;
etymology = "of Tsagan-Teg") is agenus of medium-sized ankylosauriddinosaur from the UpperCretaceous Mongolia , during theCenomanian stage.The
holotype specimen (GI SPS N 700/17), a complete skull, was recovered from the Baynshiree Svita Formation (Cenomanian -Santonian ), at the Tsagan-Teg ("White Mountain") locality, Dzun-Bayan, in the southeasternGobi Desert , Mongolia. At this time, the genus is monotypic, including only the type species, "T. longicranialis".Description
The skull measures 30 centimeters (12 in) in length, with a maximum width of 25 centimeters (10 in). Vickaryous "et al". (2004) note that "Unlike other ankylosaurs, in "Tsagantegia" the
cranial ornamentation is not subdivided into amosaic ofpolygon s but is amorphous." The quadratojugal and squamosal bosses are poorly developed, in contrast with other ankylosaurs. The skull was long and flat, smooth and bearing small horns.Phylogenetics
In their
cladistic analysis of theAnkylosauria , Vickaryous et al. (2004) placed "Tsagantegia" at the base of theAnkylosauridae , as thesister group to all other ankylosaurids.References
*Tumanova, T. A. 1993. A new armored dinosaur from southeastern Gobi. Paleontological Journal 27(2):119-125.
*Vickaryous, Maryanska, and Weishampel 2004. Chapter Seventeen: Ankylosauria. in The Dinosauria (2nd edition), Weishampel, D. B., Dodson, P., and Osmólska, H., editors. University of California Press.
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