Tsaagan

Source: Wikipedia, the free encyclopedia.

Tsaagan
Temporal range:
Ma
↓
Holotype skull
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Family: †Dromaeosauridae
Clade: †Eudromaeosauria
Subfamily: †Velociraptorinae
Genus: †Tsaagan
Norell et al., 2006
Species:
†T. mangas
Binomial name
†Tsaagan mangas
Norell et al., 2006

Tsaagan (meaning "white") is a

Djadokhta Formation of the Late Cretaceous of Mongolia
.

Discovery and naming

Skeletal showing the known remains from the holotype

The holotype of Tsaagan was discovered in 1996 and first identified as a specimen of

CAT-scan in May 1998 it was concluded that it represented a new genus. In December 2006 its type species was named and described by Mark Norell, James Clark, Alan Turner, Peter Makovicky, Rinchen Barsbold and Timothy Rowe. The species name, Tsaagan mangas, should be read as a whole with the generic name qualifying the specific epithet, and is derived from the Mongolian words for "white monster" (цагаан мангас),[1] although with an accidental misspelling of the word Tsagaan
.

The holotype specimen, IGM 100/1015, was found near Xanadu in Ömnögovi Province in layers of the Djadokhta Formation dating to the Campanian, about 75 million years ago. It consists of a well-preserved skull and series of ten neck vertebrae as well as a damaged left shoulder girdle. It is the only specimen found of Tsaagan and belonged to an adult individual.[1]

Description

Life restoration

Tsaagan was a medium-sized dromaeosaurid. In 2010

squamosal.[1]

Classification

Tsaagan is a member of the group

cladistic analysis by Norell et al. originally indicated it was more precisely a member of the Velociraptorinae.[1] In 2010 an analysis showed it was closely related to Linheraptor;[3] subsequently Senter (2011) and Turner, Makovicky and Norell (2012) argued that Linheraptor exquisitus is in fact a junior synonym of Tsaagan mangas.[4][5] Xu, Pittman et al. (2015) reject this synonymy by responding to the counterarguments proposed using new and existing details of Linheraptor's anatomy.[6]

Below are the results for the Eudromaeosauria

phylogeny based on the phylogenetic analysis performed by Currie and Evans in 2019:[7]

Eudromaeosauria

Dakotaraptor

IGM 100/22 and IGM 100/23

Boreonykus

Dromaeosaurus

Deinonychus

Acheroraptor

Velociraptor mongoliensis

Velociraptor osmolskae

Linheraptor

Tsaagan

Paleoenvironment

Tsaagan represents the only dromaeosaurid remains (other than isolated teeth) known from the

troodontid and dromaeosaurid.[1]

See also

References

  1. ^
    hdl:2246/5823
    .
  2. ^ Paul, G.S., 2010, The Princeton Field Guide to Dinosaurs, Princeton University Press p. 137
  3. ^ Xu X, Choinere J, Pittman M, Tan Q, Xiao D, Li Z, Tan L, Clark J, Norell M, Hone DW, Sullivan C (19 March 2010). "A new dromaeosaurid (Dinosauria: Theropoda) from the Upper Cretaceous Wulansuhai Formation of Inner Mongolia, China" (PDF). Zootaxa (2403): 1–9. Retrieved 2010-03-19.
  4. PMID 21726330
    .
  5. S2CID 83572446
    .
  6. ^ Xu Xing; Michael Pittman; Corwin Sullivan; Jonah N. Choiniere; Qing Wei Tan; James M. Clark; Mark A. Norell; Wang Shuo (2015). "The taxonomic status of the Late Cretaceous dromaeosaurid Linheraptor exquisitus and its implications for dromaeosaurid systematics". Vertebrata PalAsiatica. 53 (1): 29–62.
  7. S2CID 202002676
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Tsaagan&oldid=1196854663"