Alurnus sexguttatus Rosenberg 1898

Staines, C. L., 2013, A review of the genus Alurnus Fabricius, 1775 (Coleoptera: Chrysomelidae: Cassidinae), Insecta Mundi 2013 (291), pp. 1-34 : 23

Alurnus sexguttatus Rosenberg 1898

( Figure 21)

Alurnus sexguttatus Rosenberg 1898: 95 [holotype: [ Ecuador] Cachabé to Paramba, II. 97, Rosenberg/ F. C. Bowditch Coll./ M.C.Z. type 25815 (red label)/ A. sexpunctatus Rosenberg type (MCZC)]. Donckier 1899: 613 (catalog); Jacobson 1899(1900): xi (noted); Weise 1910: 103 (key), 1911a: 14 (catalog), 1911b: 19 (catalog); Campos 1921: 96 (faunal list); Fischer 1935: 271 (revision); Blackwelder 1946: 721 (faunal list); Papp 1953: 34 (catalog); Uhmann 1957a: 40 (catalog).

Description. Head, antennae, scutellum, pronotum, and venter shiny greenish-black; elytra pale yellow (some specimens with reddish tinge at humerus and laterally), with lateral (from just behind humeri) and apical margins black, with three small black spots - immediately behind humerus, near suture about a third from base, and at center of elytron behind humerus and extending to apex. Head: vertex coarsely punctate, medial sulcus present, with lunate depression; ocular sulcus present on inner margin of each eye; front and clypeus punctate. Antenna: antennomere 1 transverse, short; 2 transverse, longer than 1; 3 nearly 2x length of 1 and 2 combined; 4-10 cylindrical, decreasing in length, 4 0.33x length of 3; 11 longer than 10, pointed at apex; 1-7 punctate, each puncture with pale seta; 8-11 more densely punctate, each puncture with pale seta. Pronotum: subcylindrical; lateral margin sinuate, slightly angulate beyond middle then strongly converging to anterior angle; anterior angle rounded, with blunt tooth; posterior angle without tooth; disc convex apically, sparsely punctate; transversely depressed basally; depression and lateral margin rugosely punctate; glabrous; pronotal length 2.6 mm; pronotal width 4.1 mm. Scutellum: cordate; punctate. Elytron: lateral and apical margins smooth, strongly margined; apex evenly rounded; sutural angle without tooth; humerus moderately produced; punctation dense, finer near apex; without costae; elytral length 12.8 mm; elytral width 7 mm. Leg: punctate, each puncture with pale seta; tibia with fringe of golden setae on inner apical margin. Venter: sparsely punctate, each puncture with pale seta; abdominal sterna 4-5 with fringe of setae on apical margin. Total length: 16 mm.

Larval host plant. Unknown.

Distribution. Ecuador.

Specimens examined. Ecuador. Esmeraldas: Cachabé to Paramba (MCZC, 1). Total: 1.