Cladophorus bicolor Kleine 1926
Creators: name: Bocak, Ladislav
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lycidae
Cladophorus
Cladophorus bicolor

description: Cladophorus bicolor Kleine, 1926
(Figs. 1–2, 6, 20, 33–36, 50–54)
Cladophorus bicolor Kleine, 1926: 129.
Type material. Paratypes, 2 males, New Guinea, Idenburg River [= Taritatu River] (MIZW). Further material examined. Indonesia, Papua Prov.: 10 males, 1 female, Tikapura, 2200 m, 03°47´S 138°43´E (Voucher Numbers JB 0352–62); 3 males, Indonesia, Papua Prov., 3 km N Bokondini, 1800 m, 03°40´S 138°40´E (JB0113, JB0226– 7); 2 males, Indonesia, Papua Prov., 3 km SW Bokondini, 2100 m, 03°43´S 138°39´E (JB0188–9, all LMBC).
Diagnosis. Cladophorus bicolor is colour polymorphic and we identified four colour forms, which differ in the extent and hue of the light coloured patch in elytra (Figs. 1–2, 33–36). The most common form has small basal and apical parts of the elytra dark coloured and the brightly yellow area covers about 9/10 of the elytral surface (Fig. 33); further forms are described below (Figs. 34–36). Cladophorus bicolor has the characteristic shape of the phallus which is only gradually acuminate apically; the apical quarter of phallic length is widest and the apical process is slender but quite short (Figs. 53–54). The molecular analysis showed that C. pallescens is the closest relative and it differs in the metallically blue pronotum, uniformly yellow elytra, long antennal lamellae, and the short, robust phallus with a triangular apical part (Figs. 15, 29, 46, 71–72).
Description. Male. Body large, 14.2–16.1 mm long, dark brown to black, only middle 9/10 of elytra yellow (Figs. 20, 33), transition between dark and light coloured parts of elytra gradual (Fig. 51). Head small, with hemispherically prominent eyes, frontal interocular distance 1.52 times maximum eye diameter; antennae long, reaching beyond middle of elytral length if inclined, flabellate, antennomere 3 with lamella 2.2 times longer than stem of antennomere (Fig. 6). Pronotum slightly transverse, 1.3 times wider than long at midline, lateral margins slightly elevated, frontal margin rounded, frontal angles well marked, posterior angles sharply prominent, posterolateral carinae weak (Fig. 20). Elytra flat, slightly widened posteriorly, transverse costae weak, partly covered by pubescence, elytral areoles slightly transverse (Figs. 50–52). Phallus robust, widest in apical fourth, gradually acuminate apically and with slender apical process (Figs. 53–54). Female. Body slightly wider, antennae acutely serrate.
Colour variability. The extent and hue of the light coloured part of elytra are highly variable. Most specimens were coloured as in Figs. 1 and 33, two specimens had the apical quarter of elytra and only a very small humeral part dark coloured (Fig. 35), four specimens had a yellow patch occupying about one quarter of the elytral length (Figs. 2, 36) and four specimens had a dark brown patch in the basal part of elytra. The extent of the dark brown patch varies between a half and a quarter of elytral length (Fig. 34). Cladophorus bicolor was recorded in two localities: the vicinity of Bokondini (3 forms) and Tikapura (all four forms). The forms with the extensive yellow patch (Figs. 33, 35) are similar in principle, but individual specimens can be quite easily categorized to discrete forms and the variability of the extent of the apical black part is limited at least in the available material.
Measurements. BL 14.2–16.1 mm, PL 1.95–2.05 mm, PW 2.65–2.75 mm, WH 1.60–1.75 mm, LE 12.0– 13.5 mm, Edist 0.96 mm, Ediam 0.63 mm, antennomere 3: stem 1.0 mm, lamella 2.2 mm.
Distribution. New Guinea, Central Mts, Tolikara a Central Mamberamo regencies (Fig. 3).
description: Published as part of Bocak, Ladislav, 2017, Species delimitation of colour polymorphic Cladophorus (Coleoptera: Lycidae) from New Guinea, pp. 505-522 in Zootaxa 4320 (3) on pages 509-510, DOI: 10.11646/zootaxa.4320.3.6, http://zenodo.org/record/1051951