Cryptocephalus lunulatus Schöller, 2002
“General: Body 1.8 times as long as wide; dorsal surface shiny, with short, fine, whitish pubescence; most of ventral surface with fine, fairly dense, whitish pubescence. Head: Black; front with fairly dense punctures except on vertex, the latter usually somewhat produced; clypeus finely punctate, not sharply delimited, broadest apically. Antennae a little longer than body in male or about three-fourths length of body in female, dark brown to nearly black. Pronotum: Black throughout; in lateral view rather gibbous; punctation dual, smaller punctures minute and moderate in density, larger punctures moderate in size, rather coarse. Elytra: Black, at base narrowly reddish-orange; light marking of each elytron in lateral view nearly crescent-shaped, extending from suture (or near suture) to side of elytron and posteriorly at side to middle of elytron; sometimes (two of four specimens) apex of each elytron with small reddish-orange spot. Each elytron with nine rows of fine punctures, striae not or very feebly impressed; all rows fairly even or with rows six or seven somewhat irregular; rows of punctures very feeble to nearly disappearing at apex; punctures small and sparse; inner and outer rows of punctures at apex not clearly meeting. Ventral surface: Ventral surface and legs black, tarsi dark brown. Prosternum in male with anterior margin produced backward into a distinct, pointed process, or prosternum in female with median area between coxae somewhat produced into a longitudinal carina. Fifth abdominal segment of female with a deep, oval depression at center, or in male somewhat depressed. Length: 4.7 to 5.4 mm” (White, 1968: 65-6).
"This species is most similar to mucoreus L. The two can best be distinguished by the extent of the basal reddish spot of the elytra. In mucoreus, the spot broadly attains the suture at the center and at the side extends past the middle of the elytra; in lunatus, this spot does not or just feebly attains the suture and at the side extends to but not past the middle of the elytra. The specific name lunatus refers to the crescent-like red elytral spot" (White, 1968).
USA: Chisos Mountains, TX (White, 1968).