Fedexia, Ecolsonia and Tambachia

Ecolsonia cutlerensis (Vaugh 1969l, Berman Reisz and Ebert 1985 Early Permian; UCLA 1734, CM 388017) was considered alarge dissorophid temnospondyl. It has an elongate naris floored largely by the lacrimal. The otic notch was fully enclosed by a dorsal process of the quadratojugal. It is a sister to Tambachia.

Fedexia striegeli (Figs. 1-3; CM 76867; late Carboniferous; 300 mya; est. .6m long). is known from a 3D skull with a large naris and short rostrum. Fedexia nests at the base of the clade including Tambachia and Ecolsonia.

Tambachia tragalles (Sumida, Berman and Martens 1998; MNG 772; Wolfcampian, earliest Permian; 1m long) isa trematopid amphibian known from a large part of the skeleton and skull lacking the presacral column. It is a sister to Ecolsonia. The snout was short and the naris covered a large portion of the rostrum.

Berman DS, Reisz RR and Ebert DA 1985. Ecolsonia cutlerensis, an Early Permian dissorophid amphibian from the Cutler Formation of north-central New Mexico. New Mexico Bureau of Mines & Mineral Resources 31pp.

Moodie RL 1909. A contribution to a monograph of the extinct Amphibia of North America. New forms from the Carboniferous. Journal of Geology 17:38–82.

Moodie RL 1916. The microsaurian family stegpidae. The coal measures amphibia of North America. Carnegie Institution of Washintion 238: 222pp.

Reisz RR, Schoch RR and Anderson JS 2009. The armoured dissorophid Cacops from the Early Permian of Oklahoma and the exploitation of the terrestrial realm by amphibians. Naturwissenschaften (2009) 96:789–796. DOI 10.1007/s00114-009-0533-x

Sumida SS, Berman DS and T Martens 1998. A new trematopid amphibian from the Lower Permian of central Germany. Palaentology 41(4):605-629.

Williston SW 1910. Cacops, Desmospondylus: new genera of Permian vertebrates. Bull. Geol. Soc. Amer. XXI 249-284, pls. vi-xvii.

Williston SW 1911. Broiliellus, a new genus of amphibians from the Permian of Texas. The Journal of Geology 22(1):49-56.

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