Onchiodon labyrinthicus Geinitz, 1862

Schoch Correspondence, Rainer R., 2021, The life cycle in late Paleozoic eryopid temnospondyls: developmental variation, plasticity and phylogeny, Fossil Record 24 (2), pp. 295-319 : 298

publication ID	https://doi.org/ 10.5194/fr-24-295-2021
persistent identifier	https://treatment.plazi.org/id/186D87E6-E17F-B54C-B153-C6FEFB1B0ACD
treatment provided by	Felipe
scientific name	Onchiodon labyrinthicus Geinitz, 1862
status

Treatment

Figs. 1–5 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5

Holotype

Large tooth figured by Geinitz (1862, pl. 9, fig. 2).

Type locality and age

Niederhäslich at Freital near Dresden, Saxony, Germany.

Niederhäslich–Schweinsdorf Formation, Lower Rotliegend, Autunian,? Asselian (lowermost Permian).

Referred material

Altogether, 82 specimens from the type locality and horizon were referred to O. labyrinthicus by Boy (1990). Here, I focus on the material with the best-preserved skulls, which permit focused morphological studies as well as morphometric measurements (see Appendix B). A complete list of studied specimens is provided in the “Materials and methods” section.

Diagnosis

An eryopid growing to 280 mm skull length. Autapomorphies are as follows: (1) skull outline forming wide parabola; (2) preorbital region not longer than twice the skull table; (3) ectopterygoid tusks small; (4) interclavicle long rhomboidal in juveniles, proportionately foreshortened in adults (updated from Schoch and Milner, 2014).