Platerodrilus ngi, Masek, Michal & Bocak, Ladislav, 2014

Masek, Michal & Bocak, Ladislav, 2014, The taxonomy and diversity of Platerodrilus (Coleoptera, Lycidae) inferred from molecular data and morphology of adults and larvae, ZooKeys 426, pp. 29-63 : 41-42

Taxon classification Animalia Coleoptera Lycidae

Platerodrilus ngi sp. n. Fig. 43

Material examined.

Holotype. Male (LMBC), Singapore, Bukit Timah and Central Water Catchment, 19.-22. May 2013, 50-100 m, E. Jendek and O. Šauša leg. Paratypes. Female larvae, 6 spec., Malaysia, Pahang, Tioman, Kg. Tekek–Juara trail, 50-300 m, 2°49'10"N, 104°10'21"E, 29. Mar.-2. Apr. 2013, same locality data, 4.-16. Mar. 1998, L. Dembicky and P. Pacholatko (LMBC); 1 spec., Singapore, Sime Road swamp, 30. Oct. 2008 (ZRCS);1 spec., Singapore, Bukit Timah Nature Reserve, A. T. C. Wong 1993 (ZRCS); 1 spec., Singapore, Sime Road, C. Lee (ZRCS, #6.20969, 1993.7277, 1993.7278).

Diagnosis.

Platerodrilus ngi is the only representative of the Platerodrilus major group known from Singapore and Tioman. It differs in dark red colouration of the pronotum and humeral two thirds of elytra from Platerodrilus atronotatus from the Malay Peninsula. Platerodrilus atronotatus has the black pronotum. Additionally, the phallus of Platerodrilus atronotatus is slender and antennomeres 3 and 4 short and much wider.

Description.

Male. Body small, dark brown to black, head, prothorax, mesoscutellum and basal two thirds of elytra dark red; whole body with dense, short, pubescence. Head small, including eyes slightly wider than frontal margin of pronotum. Eyes hemispherically prominent, frontal interocular distance 1.8 times eye diameter. Antennae robust at base, compressed, reaching two thirds of elytral length, antennomere 3 0.6 times antennomere 2, antennomere 3 as long as wide at apex. Pronotum flat, 1.7 times wider than long at midline. Anterior margin almost straight, anterior angles sharply marked, posterior margin bisinuate. Elytra slightly wider posteriorly, elytra 2.8 times longer than width at humeri; only slightly widened posteriorly, elytral costae conspicuous. Legs compressed, densely pubescent. Male genitalia with straight phallus and setose parameres, short phallobase slightly shorter than parameres.

Female larva. Body slender, parallel-sided (Fig. 43), pronotum triangular, with two basal, dark coloured, glabrous tubercles; mesothorax slightly transverse, without projected posterior angles, metathorax similar in shape. Abdomen with robust, short lateral processes and fixed urogomphi.

Measurements.

Male. BL 6.9 mm, PL 0.9 mm, PW 1.6 mm, HW 2.1 mm, Edist 0.86 mm, Ediam 0.48 mm. Larva. BL 30.2 mm, PL 5.7 mm, PW 5.6 mm.

Distribution.

Singapore, Malaysia: Pahang. Biology and female specimens collected in Singapore were reported by Lok (2008).

Etymology.

The species name is a patronym in honour of Peter Ng.