Chenoprosopus is an extinct genus of temnospondyl amphibian

Amphibian

Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods...

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Chenoprosopus resembles the European genus, Archegosaurus

Archegosaurus

Archegosaurus is a genus of temnospondyl amphibian which lived during the Asselian to Wuchiapingian stages of the Permian, around 299-253 million years ago. The remains of this animal, consisting of at least 90 partial skeletons , have been found in Germany. The name Archegosaurus was coined by...

. Of the Permian amphibia found in the United States, Chenoprosopus most resembles Cacops

Cacops

Cacops is a genus of dissorophid temnospondyl that is known from the Early Permian of the central United States.It was about long and well adapted to a terrestrial lifestyle, with a heavily built skull, strong legs, a short tail, and a row of armor plates along its back...

though it differs in the smaller nostrils and in their posterior position.

Chenoprosopus milleri

In 1911, Mr Paul Miller discovered in New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

 part of the skull of a new species of Chenoprosopus

Chenoprosopus

Chenoprosopus is an extinct genus of temnospondyl amphibian.Chenoprosopus resembles the European genus, Archegosaurus. Of the Permian amphibia found in the United States, Chenoprosopus most resembles Cacops though it differs in the smaller nostrils and in their posterior position.-Chenoprosopus...

 and gave it the name Chenoprosopus milleri. The skull was long and narrow, 28 cm (11 in) long and 5.4 cm (2.1 in) wide. The teeth were stout and conical, slightly recurved and about 19 mm (0.748031496062992 in) long. A single vertebra was also found at the site and this resembled the vertebrae of Diadectes

Diadectes

Diadectes was a genus of large, very reptile-like amphibians that lived during the early Permian period...

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