Chaeridiona feae Gestro, 1958

Staines, C. L., 2007, A review of the genus Chaeridiona Baly, 1869 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 1521 (1), pp. 19-29 : 23

Chaeridiona feae Gestro

Figure 3

Choeridiona feae Gestro 1890: 239 [Syntypes: Palon, L. Fea/ Co-type (white disk with green border)/ Chaeridiona feae Gestro cotyp. (BMNH, Genoa)]. Weise 1911a: 49, 1911b: 73 (catalog); Maulik 1919: 88 ( India species); Uhmann 1943: 245 (morphology); Gaedike & Döbler 1971: 372 (type specimens).

Chaeridiona feae Gestro. Uhmann 1958: 251 (catalog); Würmli 1976: 403 (revision).

Body oblong; shining black with metallic purplish sheen; antennae, legs, and venter brownish-black. Head: coarsely punctate; produced anteriorly; with longitudinal carina in middle. Antenna: antennomere I thickest, rounded; II smaller; III longer than II; remainder subequal in length; apical 4 darker, slightly thicker than preceding; I–VII slightly rugose. Pronotum: subcylindrical; subquadrate; parallel-sided; convex; lateral margin slightly bisinuate, margined; anterior angle notched with minute tooth; surface coarsely rugose-punctate, deeply excavated on disc; pronotal width 0.9 mm; pronotal length 0.9–1.0 mm. Scutellum: depressed; smooth; impunctate; parallel-sided; rounded at apex. Elytron: combined much wider than base of pronotum; dilated posteriorly; lateral margin parallel, margined, serrate; with four weak costae- 1 st and 4 th entire, extending nearly to apex; 2 nd interrupted behind middle, less raised at base than apex; 3 rd interrupted in middle (where there is a depression) and near apex; depression present on interspace 6 near middle; interspace 7 slightly raised in middle; suture raised; elytral width 1.6–1.9 mm; elytral length 2.9–3.0 mm. Venter: smooth; shining; impunctate. Total length: 4.1–4.6 mm.

Comparative notes. This species is one of the two totally dark Chaeridiona . It can be distinguished from C. picea by the rounded exterior apical angle of the elytra and by having elytral costae 1 and 4 entire.

Food plants. Unknown.

Distribution. Myanmar: Pegu; Palon; Tharrawaddy.

Specimens examined. No locality ( USNM, 2). Myanmar: no further data ( BMNH, 3); Palon ( BMNH, 1); Palon , Pegu ( BMNH, 3), IX.1887, L. Fea ( USNM, 3), VIII–IX.1887, L. Fea ( NHMB, 1); Tharrawaddy ( BMNH, 3). Total: 16 .

Figures

FIGURE 1–3. 1. Chaeridiona angulata Staines, new species- dorsal view. 2. Chaeridiona cupreovirida Gressitt- dorsal view. 3. Chaeridiona feae Gestro- dorsal view. (line on photos equals 1 mm).