Difference between revisions of "Dercetina barclayi"

Latest revision as of 11:57, 13 August 2013

Taxonavigation

Ordo: Coleoptera
Familia: Chrysomelidae
Genus: Dercetina

Name

Dercetina barclayi Lee & Bezděk, 2013 sp. n. – Wikispecies link – ZooBank link – Pensoft Profile

Type series

Holotype ♂ (BMNH): “Doherty / Birmah RubyMes / Fry Coll. 1905. 100.”. Paratypes: 1♂, same as holotype (BMNH); 1♂, 2♀♀: “Ruby Mines. Burma. 5.500 to 7.500 ft. 1904-150.” (BMNH); 4♂♂, 1♀: “Ruby Mines U. M. / Gift of F. G. Bowditch” (USNM).

Diagnosis

This new species is similar to Dercetina taiwana but differs by yellowish brown antennae, no color variation, wider penis, and with longer endophallic sclerites.

Description

Color (Figs 3–4) bluish black, prothorax, coxae, and tibiae yellowish brown; elytron with one trasverse white stripe at basal 1/3; head brown, vertex and labium black. Head smooth and impunctate. Pronotum transverse, 2.2 times wider than long, evenly convex on disc and lacking fovea or punctured depression, disc with scattered fine punctures; lateral margin rounded, anterior margin slightly concave, posterior margin straight. Elytra more or less widened posteriorly, apex convergently rounded, 1.4-1.5 times longer than wide, disc with punctures in part arranged in longitudinal rows, epipleurae smooth and impunctate.
Male. Length 3.9–4.3 mm, width 2.1–2.4 mm. Antennomeres III-X weakly serrate (Fig. 16), ratio of length of antennomeres III to XI about 1.0: 1.2: 1.2: 1.2: 1.2: 1.2: 1.1: 1.1: 1.3; ratio of length to width of antennomeres III to XI about 2.6: 3.0: 3.3: 3.4: 3.4: 3.9: 3.8: 3.7: 4.8. Penis (Fig. 18) extremely slender, about 7.3 times longer than wide, parallel-sided, basally and apically widened, apex narrowly rounded; tectum membranous, with scatted stout setae; weakly curved in lateral view (Fig. 19); endophallic sclerites elongate, about 0.5 times as long as penis, dorsal sclerite with base bifurcate, apex truncate; ventral sclerite much longer than dorsal sclerite, apex bifurcate, base rounded, with a cluster of short setae at middle; in lateral view moderately curved. Female. Length 4.7–5.3 mm, width 2.8–3.1 mm. Antenna 11-segmented, antennomeres III-X weakly serrate (Fig. 17), comparatively narrower than male, ratio of length of antennomeres III to XI about 1.0: 1.2: 1.2: 1.2: 1.2: 1.2: 1.0: 1.0: 1.2; ratio of length to width of antennomeres III to XI about 3.2: 3.6: 3.4: 3.6: 3.5: 3.3: 3.0: 3.2: 3.8. Sternite VIII (Fig. 20) weakly sclerotized subapically, apex rounded, with dense short setae along lateral and apical margin, spiculum long. Spermathecal receptaculum (Fig. 22) strongly swollen; pump narrow and strongly curved, apex widely rounded; spermathecal duct short, deeply projecting into receptaculum. Gonocoxae (Fig. 21) narrowly connected in middle, about 5.5 times longer than wide, slightly curved inwards near apex, apex rounded, with one short setae at apical 1/3, ten to eleven setae at apex.

Etymology

This new species is named for Maxwell V. L. Barclay who is one of Britain’s leading entomologists and curator of Coleoptera at the Natural History Museum in London.

Distribution

Only known from the type locality.

Original Description

• Lee, C; Bezděk, J; 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: 1-33. doi

Images

Figures 1–4. Habitus of Dercetina species. 1 Dercetina azumai, dorsal view 2 Dercetina azumai, ventral view 3 Dercetina barclayi sp. n., dorsal view 4 Dercetina barclayi sp. n., ventral view.  Figures 16–22. Dercetina barclayi sp. n. 16 Antenna, male 17 Antenna, female 18 Aedeagus, dorsal view 19 Aedeagus, lateral view 20 Sternite VIII 21 Gonocoxae 22 Spermatheca.