Cephaloleia triangularis Staines 1996

Cephaloleia triangularis is a species of rolled-leaf beetle in the family Chrysomelidae, first found in Costa Rica.

Elongate; subparallel; subdepressed; head (except yellow frons) antennae, and scutellum black; pronotum reddish or yellowish with black macula on anterior margin behind head which varies from semicircular to triangular in shape; elytra black with yellow longitudinal vitta, width of vitta varies from interspace 1 to interspace 7, not narrowing; venter with pro-, meso-, and metasterna yellow medially, black laterally, abdominal sterna 1 yellow medially, black laterally, 2–5 black medially, yellow laterally; legs with femur yellowish, tibia and tarsi black. Head: vertex punctate, medial carina present; frons not projecting; not depressed between eyes. Antenna: reaches to humerus; slender; antennomere 1 incrassate, clavate, elongate; 2–3 transverse, projection on inner apical angle; 2 ¼ length of 1, shortest; 3–4 subequal; 5–10 transverse, subequal in length; 11 rounded at apex, 2× length of 10; 1–3 punctate with scattered setae; 4–11 setose. Pronotum: quadrate; lateral margin straight then rounding to anterior angle, margined; anterior angle rounded, not produced; posterior angle acute; anterior margin straight; disc flattened; surface impunctate; basal impression absent; pronotal length 1.0–1.3 mm; pronotal width 1.3–1.7 mm. Scutellum: triangular; impunctate. Elytron: lateral margin straight, smooth, margined; apex rounded; sutural angle without tooth; humerus rounded, not produced; slightly constricted behind humerus; shallowly punctate-striate, rows obsolete at apex; elytral length 4.1–5.1 mm; elytral width 1.7–2.1 mm. Venter: pro-, meso-, and metasterna impunctate medially, punctate laterally; abdominal sterna punctate, each puncture with pale seta; suture between sterna 1 and 2 complete. Leg: robust, short; femur punctate; tibia with spoon-like depression at apex, tuft setae on inner margin. Total length: 5.7–7.1 mm.

Costa Rica.