Spondylerpeton

Spondylerpeton is an extinct genus of embolomere closely related to "Cricotus"^[1] (Archeria) in the family Archeriidae.^[2] This genus is known from fragmentary remains, namely a short series of tail vertebrae preserved in an ironstone nodule. These remains were found in the Mazon Creek beds of Illinois, an area famed for its preservation of Carboniferous plants and animals.^[3][4] Spondylerpeton individuals were probably about three to four feet in length, by far the largest animals known to have inhabited the Mazon Creek area during this era.^[1]

Spondylerpeton Temporal range: Late Carboniferous, 309–307 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Embolomeri
Family:	†Archeriidae
Genus:	†Spondylerpeton Moodie, 1912
Type species
†Spondylerpeton spinatum Moodie, 1912

They are actively found in terrestrial environment, in freshwater and are actively mobile