Monolepta marginicolloides sp. nov.

urn:lsid:zoobank.org:act: 55D980FA-A34D-40B8-9F12-4DFE28E3147D

Figs 52–54

Type material. Holotype: ♀ “Johor, Gunung Ledang, 19-23.VI.93, Yusof, Saiful, Meor” (UKM; Fig. 52). Type locality: 2º22′ N / 102º36′ E . – Paratypes: Brunei. 1 ex., Labi, Bukit Teraja, 60 m Mxt. Dipt. Forest, 4º18′ N / 114º26′ E, 26.VIII.1979, S. L Shutton (BMNH) . – Indonesia. 3 ex., N Sumatra, Bivouac one Mt Bandahara, 3º43′ N / 97º41′ E, 25.VI.–5.VIII.1972, J. Krikken (RMNH ); 1 ex., Kalimantan, Timur Apokayan, Long Sungei Barang, 900 m, 1º15′ S / 116º49′ E, 15.–23. II.1997, CuP Zorn (CJB) ; 1 ex., Borneo, Kalimantan Tengah Busang / Rekut conf., 0º3′ S / 113º59′ E, VIII.2001, Brendell / Mendel (BMNH) . – Malaysia. 1 ex., Penang, 5º15′ N / 100º29′ E (BMNH); 1 ex., Sarawak, 4th Division, Gn. Mulu NP., 3º55′ N / 114º46′ E, P. M. Hammond et al. (BMNH) ; 1 ex., Perak, Cameron Highlands, Ringlet, 4°25N / 101°23E, V.2001, M. Riha (CJB) .

Etymology. The name refers to the similarity in colouration pattern to M. marginicollis; suffix -oides (grec.): similar as.

Description

Total length. 3.70–5.10 mm (mean 4.38 mm; n = 6).

Head. Very finely punctuated, blackish and shiny, as labrum and mandible. Antenna long and slender, extending to the middle of the elytra, blackish, only three basal antennomeres yellowish (Figs 52b, 53A). Third antennomere longer than second; ratio length of second to third antennomere 0.67–0.75 (mean 0.69); ratio length of third to fourth antennomere 0.38–0.43 (mean 0.41; Fig. 53B).

Thorax. Pronotum very finely punctuated, broad, entirely yellowish. Pronotal width 1.20–1.55 mm (mean 1.37 mm), ratio length to width 0.58–0.63 (mean 0.60). Scutellum, meso- and metathorax black. Elytron yellowish with completely black margins (Fig. 52b), or only most parts of the suture, base, and part of margins beyond humerus black (Fig. 53A). Elytral length 2.90–3.95 mm (mean 3.48 mm), maximal width of both elytra together 2.00– 2.70 mm (mean 2.38 mm), ratio of maximal width of both elytra together to length of elytron 0.68–0.70 (mean 0.69). Legs entirely yellowish.

Abdomen. Yellowish, darker in the middle of abdomen.

Male genitalia. Median lobe long and strongly narrowed in the apical quarter (Fig. 53C), tectum short, broad at base. Median spiculae fine short bristles, lateral spiculae flattened, v-shaped, ventral spiculae weakly sclerotised as group of small spines (Figs 53 Ca, Cb).

Female genitalia. Spermatheca with small spherical nodulus, long and curved median part and cornu (Fig. 53D). Dorsal pair of bursa sclerites with strong spines, ventral part more elongated, with serrate margins (Fig. 53E).

Diagnosis. Colouration pattern very similar to M. marginicollis, but M. marginicolloides sp. nov. is on average larger (total length 3.70–5.10 mm; M. marginicollis 3.25–4.00 mm), and elytra are a bit slenderer (ratio of maximal width of both elytra together to length of elytron 0.68–0.70; M. marginicollis 0.71–0.74). Other characters to differentiate these species are the yellow-brownish head and vertex with short central black stripe in M. marginicollis, while head in M. marginicolloides sp. nov. is completely black. The genitalic characters are very different and allow a clear differentiation of both species in any doubtful cases (Figs 34C, D, 53C–E).

Distribution. Known from Peninsular Malaysia and Borneo (Sarawak, Kalimantan, Brunei) (Fig. 54).