page_title: Stephanospondylus
section_title: Description
hierarchical_section_title: Stephanospondylus / Description
caption_attribution_description: English: Reconstruction of the skeleton of Stephanospondylus pugnax from "Uber Stephanospondylus n. g. und Phanerosaurus H. v. Meyer" by R. Stappenbeck (Zeitschrift der Deutschen Geologischen Gesellschaft 57: 380–437). This reconstruction was based on material from Stephanospondylus and the amphibian Onchiodon found together on the same slab. The bones of both animals were thought to represent a single individual.
context_page_description: Stephanospondylus is an extinct genus of diadectid reptiliomorph from the Early Permian of Germany. Fossils have been found in deposits of the Lower Rotliegend near Dresden. The type species S. pugnax was originally referred to the genus Phanerosaurus in 1882 but was placed in its own genus in 1905.
context_section_description: Stephanospondylus is known only from several vertebrae and fragments of the upper and lower jaws. It was named in 1882 on the basis of two slabs, the fossils in which were thought to represent two individuals. With the erection of a new genus in 1905, the fossils were considered to be part of a single individual. In 1925, Alfred Romer determined that only parts of the jaws and some vertebrae belonged to Stephanospondylus; the other material belonged to the temnospondyl amphibian Onchiodon.
  Stephanospondylus has spade-shaped teeth adapted to cutting plant material. The vertebrae are distinct from those of other diadectids in that they lack hyposphene-hypantrum articular surfaces. The holotype specimen may represent a juvenile form of another diadectid. Because so little is known of the genus, the relationship of Stephanospondylus to other diadectids is poorly known.
caption: A 1905 skeletal reconstruction of Stephanospondylus based partly on material from Onchiodon.
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