theromorphaAn order of fossil reptiles, of the Permian period, so called from certain resemblances they present to mammals. The quadrate bone is fixed; the ribs are two-headed; the precoracoid is present, and the coracoid is reduced in size, with free extremity; the vertebræ are amphicœlous, and the pubic bones are entirely anterior to the ischia; and there is no obturator foramen. Some of the Theromorpha were made known by Owen under the name Theriodontia. These remains were from Cape Colony, but the Theromorpha have mostly been studied by Cope from remains found in the Permian of Texas. The order is divided by Cope into Anomodontia and Pelycosauria. See these words. Also, rarely, Theromora.
Webster's Revised Unabridged Dictionary
NL.: Gr. qh`r beast + morfh` form
In the more basal Theromorpha the teeth are not so limited in position.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard