From Wikipedia, the free encyclopedia
Jump to: navigation, search
Temporal range: Late Carboniferous, 302Ma
Ianthasaurus BW.jpg
Life restoration of Ianthasaurus hardestii
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Family: Edaphosauridae
Genus: Ianthasaurus
Reisz and Berman, 1986
Type species
Ianthasaurus hardestii
Reisz & Berman, 1986

Ianthasaurus was a small edaphosaurid from the Late Carboniferous.


Life restoration of I. hardestii

It is one of the smallest pelycosaurs known, with an 8 cm skull and a total body length of 75 cm.[1] Ianthasaurus lacks many of the spectacular specializations seen in Edaphosaurus. For example, the marginal dentition of Ianthasaurus is similar to that of insectivorous reptiles, with slender conical teeth which are slightly recurved at the tips, and there is a slight development of a caniniform region. The palatal and mandibular dentition is unspecialized, and there are no batteries of teeth for crushing of plant materials. Also unlike Edaphosaurus, Ianthasaurus was lightly built and was probably quite agile. The skull was similar to that to Haptodus, a sphenacodontid, though they were distantly related.


It was named by Robert R. Reisz and David Berman in 1986.[2][3] It was discovered by them in the Upper Pennsylvanian Rock Lake Shale near Garnett, Kansas.[2]

See also[edit]


  1. ^ T.S. Kemp (2005) The origin and evolution of mammals p.24.
  2. ^ a b Robert R. Reisz and David S. Berman (1986). "Ianthasaurus hardestii n. sp., a primitive edaphosaur (Reptilia, Pelycosauria) from the Upper Pennsylvanian Rock Lake Shale near Garnett, Kansas". Canadian Journal of Earth Sciences 23 (1): 77–91. doi:10.1139/e86-008. 
  3. ^ "Paleobiology Database:Ianthasaurus". Retrieved December 11, 2007.