[2] It is significantly smaller than Chenoprosopus milleri and was differentiated from that taxon by Hook (1993) based on sutural patterns of the skull roof.

[3] However, Chenoprosopus is distinguished by its more narrowly pointed snout and separation between the nasal from the maxilla by the broad lacrimal-septomaxilla contact.

[5] The cochleosaurid amphibian Chenoprosopus was discovered in El Cobre Canyon Formation near the Miller bone bed in the vicinity of Arroyo del Agua, north-central New Mexico[6] by Mr. Paul C. Miller and established as a new genus based on an incomplete skull by Mehl in 1913.

[2][7] Analysis of the remains is inhibited because, although the anterior third and the left side to the median line are complete, the loss of the upper posterior border of the skull (prevents us from understanding something about the critter).

The upper side of the quadrate is thin, with plate-like bone extending up and forward as if to connect with the skull just above the otic notch.

The septomaxillae are small, triangular elements, fully twice as long as wide, and form nearly the entire posterior border of the naris.

[2] The premaxillary teeth of Chenoprosopus number approximately twenty (Hook, 1993)[9] and have a short contact with the maxilla at the skull margin.

These teeth have relatively narrow, round bases, recurved distal halves, and sharply pointed ends.

Anterior palatal fossae occur on the vomers as modest concavities separated by a thin longitudinal septum.

The posterior pterygoid process extends upward in a thin plate, including a large infra-temporal vacuity.

Mehl suggested that Chenoprosopus fed on soft organisms such as worms and the larvae of large insects of its time.

Mehl states that the laterally directed orbits of Chenoprosopus is strongly suggestive of its terrestrial life.

[7] Also, the absence of lateral line sulci on the roof of the skull and the well ossified qualities of the postcranial skeleton also support the notion that they had a terrestrial life.