Denazinemys

Denazinemys; Temporal range: Late Cretaceous,
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Pantestudines
Clade:	Testudinata
Clade:	†Paracryptodira
Family:	†Baenidae
Clade:	†Baenodda
Genus:	†Denazinemys; Lucas and Sullivan, 2006
Species
	D. nodosa (Gilmore, 1916)
Synonyms[1]
	"Baena" nodosa Gilmore, 1916

Denazinemys was a genus of baenid turtle that lived in the Late Cretaceous of New Mexico. The holotype specimen, which D. nodosa was based on, USNM 8345, consists of a partial carapace and plastron. It came from the De-na-zin Member of the Kirtland Formation, and therefore, Denazinemys lived in the Kirtlandian land-vertebrate age. Many specimens other than the holotype have been assigned to Denazinemys.[1]

Distinguishing characteristics

Previously, Scabremys ornata was assigned to Denazinemys as D. ornata. Below are the features found in Denazinemys distinguishing the two genera:[1]

a carapace that is sub-triangular with widest dimension posteriorly;
prepleurals present and touching the first vertebrae medially;
the first vertebrae an irregular hexagonal shape with the greatest width posteriorly, contacting anterior second vertebrae;
extracervicals lateral to the primary cervicals, the cervicals being sub-divided;
and carapace nodes irregular and not forming distinct ridges.

Classification

Denazinemys is a baenid along with Plesiobaena, Boremys, Scabremys, Baena and Chisternon.[1]

Below is a cladogram made by Sullivan et al. in 2013 showing the relations of Denazinemys: (note: Boremys pulchra is partly a junior synonym of Boremys grandis)[1]

Baenidae

hypothetical ancestor

Neurankylus eximius

Trintichelys hiatti

Baenodda

Plesiobaena antiqua

Scabremys ornata

Boremys pulchra

Chisternon undatum

	Baena arenosa

	Denazinemys nodosa

References

Sullivan, R.M.; Jasinski, S.E.; Lucas, S.G. (2013). "Re-Assessment of Late Campanian (Kirtlandian) Turtles from the Upper Cretaceous Fruitland and Kirtland Formations, San Juan Basin, New Mexico, USA" (PDF). In Brinkman, D.B.; et al. (eds.). Morphology and Evolution of Turtles. Vertebrate Paleobiology and Paleoanthropology. pp. 337–339. doi:10.1007/978-94-007-4309-0_20.

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[sullivan2013-1] Sullivan, R.M.; Jasinski, S.E.; Lucas, S.G. (2013). "Re-Assessment of Late Campanian (Kirtlandian) Turtles from the Upper Cretaceous Fruitland and Kirtland Formations, San Juan Basin, New Mexico, USA" (PDF). In Brinkman, D.B.; et al. (eds.). Morphology and Evolution of Turtles. Vertebrate Paleobiology and Paleoanthropology. pp. 337–339. doi:10.1007/978-94-007-4309-0_20.