Fine Art

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria

Familia: †Edaphosauridae
Genera: Edaphosaurus – Ianthasaurus
Vernacular names
English: Edaphosauridae
galego: Edaphosauridae
magyar: Edaphosauridae
italiano: Edaphosauridae
日本語: エダフォサウルス科
한국어: 에다포사우루스과
português: Edaphosauridae
русский: Эдафозавры
中文: 基龍科

Edaphosauridae is a family of mostly large (up to 3 meters or more) Late Carboniferous to Early Permian synapsids. Edaphosaur fossils are so far known only from North America and Europe.


They were the earliest known herbivorous amniotes and, along with the Diadectidae, the earliest known herbivorous tetrapods. The head is small in relation to the bulky body, and there is a tall sail along the back, which may have functioned as a thermoregulatory device.

The interrelationships of Edaphosauridae was investigated in details by David M. Mazierski and Robert R. Reisz (2010). The cladogram below is modified after their phylogenetic analysis.[2]


Ianthasaurus hardestiorum

Glaucosaurus megalops

Lupeosaurus kayi

Edaphosaurus novomexicanus

Edaphosaurus colohistion

Edaphosaurus boanerges

Edaphosaurus cruciger

Edaphosaurus pogonias

Below is a cladogram modified from the analysis of Benson (in press):[3]

Tseajaia campi

Limnoscelis paludis


Captorhinus spp.

Protorothyris archeri





Ianthodon schultzei


Ianthasaurus hardestiorum

Glaucosaurus megalops

Lupeosaurus kayi

Edaphosaurus boanerges

Edaphosaurus novomexicanus


Haptodus garnettensis

Pantelosaurus saxonicus




Frederik Spindler, Sebastian Voigt & Jan Fischer (2019) Edaphosauridae (Synapsida, Eupelycosauria) from Europe and their relationship to North American representatives. PalZ (advance online publication) DOI:
David M. Mazierski and Robert R. Reisz (2010). "Description of a new specimen of Ianthasaurus hardestiorum (Eupelycosauria: Edaphosauridae) and a re-evaluation of edaphosaurid phylogeny". Journal of Vertebrate Paleontology. 47 (6): 901–912. Bibcode:2010CaJES..47..901M. doi:10.1139/E10-017.

Benson, R.J. (2012). "Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies". Journal of Systematic Palaeontology. 10 (4): 601–624. doi:10.1080/14772019.2011.631042. S2CID 84706899.

Carroll, R. L. (1988), Vertebrate Paleontology and Evolution, WH Freeman & Co.
Reisz, R. R., 1986, Handbuch der Paläoherpetologie – Encyclopedia of Paleoherpetology, Part 17A Pelycosauria Verlag Dr. Friedrich Pfeil, ISBN 3-89937-032-5

Biology Encyclopedia

Retrieved from ""
All text is available under the terms of the GNU Free Documentation License

Home - Hellenica World