Melanedaphodon hovaneci (Mann et al 2023, Late Carboniferous was originally conidered an edaphosaurid, but here nests with Araeoscelis close to Petrolacosaurus.

Araeoscelis gracilis (Williston 1910; Reisz, Berman and Scott 1984) ~275 mya, Early Permian, 60 cm long, was an early diapsid described with closure of the lateral temporal fenestra--but that may not be true on closer examination. Derived from a sister to Petrolacosaurus Araeoscelis left no known descendants. The trend toward closure of the temporal fenestrae in early diapsids is also seen in Mesosaurus and Stereosternum.

Distinct from Petrolacosaurus, the skull of Araeoscelis had a slightly longer rostrum and more robust teeth. The quadrate articulation was far below the jaw line. The cervicals were slightly more elongated. The torso was deeper and the tail was more gracile. The robust pectoral girdle was much larger than the pelvis. Metatarsals II-IV aligned with p1.1.

Mann A, Henrici AC, Sues H-D and Pierce SE 2023. A new Carboniferous edaphosaurid
and the origin of herbivory in mammal forerunners. Nature.com/scientificreports. https://doi.org/10.1038/s41598-023-30626-8

Reisz RR, Berman DS and Scott D 1984. The anatomy and relationships of the lower Permian reptile Araeoscelis. Journal of Vertebrate Paleontology 4: 57-67.

Vaughn PP 1955. The Permian reptile Araeoscelis re-studied. Harvard Museum of Comparative Zoology, Bulletin 113:305-467.

Williston SW 1910. New Permian reptiles; rhachitomous vertebrae. Journal of Geology 18:585-600.

Williston SW 1913. The skulls of Araeoscelis and Casea, Permian reptiles. Journal of Geology 21:743-747.

wiki/Araeoscelis
wiki/Melanedaphodon