Anconastes  Anconastes is an extinct genus of dissorophoid temnospondyl within the family Trematopidae. It is known from two specimens from the Late Carboniferous Cutler Formation of north-central New Mexico in the southwestern United States. The genus name derives from two Greek roots, "ankos" ("mountain glen or valley") and "nastes" ("inhabitant"), which refers to the type locality of El Cobre Canyon where the specimens were found. The species name derives from the Latin word "vesperus" ("western"). The more complete specimen, the holotype, is a partial skull with articulated mandibles and a substantial amount of the postcranial skeleton. The less complete specimen, the paratype, consists only of the right margin of the skull with an articulated mandible. When originally described, only three other trematopid taxa were recognized: "Acheloma, Actiobates", and ""Trematops"" (now a synonym of "Acheloma"); "Ecolsonia", which is now considered a trematopid by most workers, had recently been re-described as a dissorophid on the basis of new material. Berman et al. suggested two autapomorphies: (1) an internal naris that is half as wide as it is long; and (2) a dense covering of non-overlapping scales or osteoderms in the dorsal trunk region. They further differentiated "Anconastes" from "Acheloma" and ""Trematops"" by several features: (1) large orbit with a width equal to 1/3 the midline length of the skull; (2) a short suborbital bar with a maxilla entering the orbital margin; (3) pointed snout without prominent dorsomedial expansion of the postparietals; (4) nasals, frontals, and parietals of subequal length; (5) parietals approximately three times the length of the postparietals; (6) frontals not extending beyond the anterior margin of the orbit; (7) large interpterygoid vacuities; (8) an open basicranial joint; and (9) absence of an internarial opening or bone. They differentiated "Anconastes" from "Actiobates" by the presence of a quadratojugal contributing substantially to the ventral margin of the otic notch.