Phreatophasma aenigmaticum Efremov, 1954

Brocklehurst, Neil & Fröbisch, Jörg, 2017, A re-examination of the enigmatic Russian tetrapod Phreatophasma aenigmaticum and its evolutionary implications, Fossil Record 20 (1), pp. 87-93 : 88

Phreatophasma aenigmaticum Efremov, 1954

Diagnosis: distinguished from other members of Caseidae by the lack of a prominent, rugose mound on the dorsal surface and by the almost identical distal extent of the condyles of the femur.

Holotype: PIN 294/25, right femur ( Fig. 1 ). This specimen is a cast; the original has been lost.

Locality and horizon: Santagulov Mine, Bashkortostan Province, Russia. Golyusherma Subassemblage, early Kazanian age ( Golubev, 2000), thought to be equivalent to the Roadian ( Benton, 2012).

Figures

Figure 1. PIN 294/25, cast of the holotype of Phreatophasma aenigmaticum. (a) Ventral view; (b) dorsal view. Abbreviations: IF – intertrochanteric fossa, AC – anterior condyle, PC – posterior condyle.