Dercetina unifasciata (Allard, 1889) Allard, 1889

Lee, Chi-Feng & Bezdek, Jan, 2013, Revision of the genus Dercetina from Taiwan and their similar species, with description of a new species from Myanmar (Insecta, Chrysomelidae, Galerucinae), ZooKeys 323, pp. 1-33 : 19-21

Dercetina unifasciata (Allard, 1889) stat. r. and comb. n.

Antipha unifasciata Allard, 1889: 107; Kimoto 1989b: 229. (as synonymy of Dercetina flavocincta )

Type material.

Antipha unifasciata : Holotype ♀ (head lost; ISNB): "Cambodge / Coll. Chapuis / E. Allard det.: Antipha unifasciata All. / Antipha unifasciata All. (yellow label) / TYPE (pink label) / cf. Ann. Soc Ent. Belg., XXXIII, 1889, p. 107-108 / sec. Weise, Col. Cat. Junk (78), 1924: p. 145 Dercetis unifasciata All.".

Material examined.

CAMBODIA: 1♀, Kampot prov., Bokor, 8.V.1961, leg. J. L. Nickel (USNM); INDIA: 1♀ (BMNH), Darjeeling, Bengal, Debrepani, 6000', 18.IX.1929, leg. J.C.M. Gardner; LAOS: 1♀, Attapeu Prov., Houei Kong, 31.V.1965, leg. Native Collector (BPBM); 1♀, Borikhane Prov., Pakkading, 31.VII.1965, leg. Native Collector (BPBM); 1♀, Sayabouly Prov., Sayaboury, 16.IV.1965, leg. J. L. Gressitt (BPBM); 1♀, Sedone Prov., Paksong, 18.V.1965, leg. P. D. Ashlock (BPBM); 1♂, 1♀, Vientiane Prov., Ban Van Eue, 20km E of Phou-kow-kuei, 1-15.V.1965, leg. J. A. Rondon (BPBM); 1♂, same locality, 11.IV.1965, leg. J. L. Gressitt (KMNH); 1♂, 1♀, same locality, 12.IV.1965, leg. J. L. Gressitt (BPBM); 1♂, 15.VIII.1965, leg. J. L. Gressitt (BPBM); 1♀, same locality, 15.III.1966, leg. Native Collector (BPBM); 1♀, 15.XII.1966, leg. Native Collector (BPBM); 1♀, same locality, 2.II.1968, leg. Native Collector (BPBM); 1♀, same locality, 15.II.1968, leg. Native Collector (BPBM); 1♀, same locality, 15.VIII.1968, leg. Native Collector (BPBM); 1♀, Phou-kow-kuei, 15.IV.1965, leg. J. L. Gressitt (BPBM); 1♀, Vientiane Prov., Vientiane, 30.IV.1967, leg. Native Collector (BPBM); 1♀, Xieng Kyouang Prov., Ban Sam Thang, 5.XI.1965, leg. Native Collector (BPBM).

Diagnosis.

Dercetina unifasciata is similar to Dercetina taiwana and Dercetina barclayi sp. n. with the evenly convex pronotum and similar color pattern but differing by antennomere IV much longer than III (1.8 times in Dercetina unifasciata in contrast with 1.2 or 1.3 times in Dercetina taiwana and Dercetina barclayi sp. n.).

Redescription.

Color (Figs 63-64) bluish black, head, prothorax, coxae, and tibiae yellowish brown; elytra with one transverse white stripe at basal 1/3. Head smooth and impunctate. Pronotum transverse, 2.0 times wider than long, evenly convex on disc and lacking fovea or punctured depression, disc with scattered fine punctures; lateral margin almost straight, anterior margin slightly concave, posterior margin slightly rounded. Elytra more or less widened posteriorly, apex convergently rounded, 1.4 times longer than wide, disc with punctures in part arranged in longitudinal rows, epipleurae smooth and impunctate.

Male. Length 4.7 mm, width 2.5 mm. Ratio of length of antennomeres III to XI about 1.0: 1.8: 1.9: 1.9: 1.9: 1.8: 1.8: 1.7: 2.0; ratio of length to width of antennomeres III to XI about 3.8: 6.0: 6.2: 6.1: 6.3: 5.9: 6.2: 6.3: 7.1 (Fig. 69). Penis (Fig. 71) extremely slender, about 11.0 times longer than wide, parallel-sided, basally and apically widened, apex narrowly rounded; tectum membranous, with scattered long setae; weakly curved in lateral view, apex recurved and pointed (Fig. 72); endophallic sclerites elongate, about 0.6 times as long as penis; apex pointed, ventrally covered with a small apically pointed sclerite; with a cluster of long setae at middle; sinuate in lateral view.

Female. Length 4.7-5.8 mm, width 2.7-3.2 mm. Antenna filiform (Fig. 70), similar to male, ratio of length of antennomeres III to XI about 1.0: 1.7: 1.7: 1.7: 1.8: 1.7: 1.6: 1.5: 1.9; ratio of length to width of antennomeres III to XI about 3.9: 6.6: 6.2: 6.3: 6.3: 5.7: 5.7: 5.4: 6.7. Sternite VIII (Fig. 73) weakly sclerotized subapically, apex rounded, with dense short setae along apical margin, spiculum extremely long. Spermathecal receptaculum (Fig. 75) slightly swollen; pump narrow and strongly curved, apex widened and truncate; spermathecal duct short, narrowed in middle, shallowly projecting into receptaculum. Gonocoxae (Fig. 74) very close at middle, about 5.9 times longer than wide, slightly curved inwards near apex, apex rounded, with one or two short setae at apical 1/3, two subapically, eight setae at apex.

Distribution.

Cambodia, India, Laos.