Coelurosauravus bone identification error

A recent paper
by (Bulanov and Sennikov 2015) reinterpreted and misidentified one posterior skull bone of Coelurosauravus, the helmeted Permian glider (Figs. 1, 2).

Coelurosauravus.

Figure 1. Coelurosauravus. It had ribs, but no transverse processes. The extradermal rods were more numerous than the ribs. Click to learn more.

Here’s the problem:
Bluanov and Sennikov identified a triradiate bone as the jugal. Unfortunately, no kuehneosaur sister taxa in the large reptile tree have a triradiate jugal. They all lack a quadratojugal process on the jugal. The triradiate bone is the postorbital. The bone matches prior interpretations, including small triangular ossifications.

Figure 2. Coelurosauravus skull as interpreted earlier and presently. At right as reinterpreted by Bulanov and Sennikov. The mistook the triradiate and ornamented postorbital for a jugal. No sister taxa have a triradiate jugal. Click to enlarge. There were several scale bar problems as well.

Figure 2. Coelurosauravus skull as interpreted earlier and presently. At right as reinterpreted by Bulanov and Sennikov. The mistook the triradiate and ornamented postorbital for a jugal. No sister taxa have a triradiate jugal. Click to enlarge. There were several scale bar problems as well.

References
Bulanov VV and Sennikov AG 2015. New data on the morphology of the Late Permian gliding reptile Coelurosauravus elivensis Piveteau. Paleontological Journal 49:413-423.
Carroll RL 1978. Permo-Triassic “Lizards” from the Karoo System Part II. A gliding reptile from the Upper Permian of Madagascar. Palaeontografica Africana. 21:143-159.
Evans SE 1982. Gliding reptiles of the Late Permian. Zoological Journal of the Linnean Society, 76:97–123.
Evans SE and Haubold H 1987. A review of the Upper Permian genera CoelurosauravusWeigeltisaurus and Gracilisaurus (Reptilia: Diapsida). Zoological Journal of the Linnean Society 90:275–303.
Fraser NC, Olsen PE, Dooley AC Jr and Ryan TR 2007. A new gliding tetrapod (Diapsida: ?Archosauromorpha) from the Upper Triassic (Carnian) of Virginia. Journal of Vertebrate Paleontology 27 (2): 261–265.
Frey E, Sues H-D and Munk W 1997. Gliding Mechanism in the Late Permian Reptile Coelurosauravus. Science Vol. 275. no. 5305, pp. 1450 – 1452
DOI: 10.1126/science.275.5305.1450
Piveteau J 1926. Paleontologie de Madagascar, XIII. Amphibiens et reptiles permiens: Annales de Paleontologie, v. 15, p. 53-128.

wiki/Coelurosauravus
wiki/Mecistotrachelos

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