Gonocnemis sericeus sericeus (Fabricius, 1801)

Bremer, Hans J. & Grimm, Roland, 2017, The species of Gonocnemis and Paragonocnemis from Borneo with notes on synonymy in the Oriental species (Coleoptera: Tenebrionidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 331-343 : 333-334

Gonocnemis sericeus sericeus (Fabricius, 1801)

( Figs 5a, 5b )

Opatrum sericeum Fabricius, 1801: 120 (original description).

Gonocnemis dapsoides Fairmaire, 1882: 246 (original description). GEBIEN (1906): 225 (synonymy).

Gonocnemis sericeus sericeus: ARDOIN (1964d) : 128–129 (redescription).

Material examined. INDONESIA: EAST KALIMANTAN: Ca. 15 km N Balikpapan, Sungai Wain Protection Forest , 01°08.1′S, 116°49.9′E, 35 m, 8.–11.xii.2011, 5 spec. (primary rainforest; individual collecting in stream, puddles and dead wood; light trap at border of forest), J. Hájek, J. Schneider & P. Votruba leg. (1 RGCN, 3 NMPC, 1 SMNS) ; ca. 55 km W of Balikpapan, PT Fajar Surya Swadaya [area], base camp surrounded with Acacia plantation, 01°13.4′S, 116°22.6′E, 66 m, 26.+ 30.xi.2011, 1 spec. (individual collecting on vegetation, dead wood and in puddles & light trap), P. Votruba, J. Schneider & J. Hájek leg. ( NMPC) ; ca. 50 km W of Balikpapan, PT Fajar Surya Swadaya [area], base camp surrounded with Acacia plantation, 01°16.4′S, 116°21.1′E, 82 m, 23.xi.–1.xii.2011, 2 spec. (individual collecting on vegetation, dead wood and in puddles & light trap), P. Votruba, J. Schneider & J. Hájek leg. (1 NMPC, 1 SMNS) ; near Balikpapan , 9.iv.1998, 1 spec., 24.viii.1998, 49 spec., 8.xii.1998, 1 spec., 2.ii.1999, 1 spec., 9.v.1999, 1 spec., H. Makihara leg. (49 KACO, 4 RGCN) . SOUTH KALIMANTAN: Papagaran , 25.–30.x.2007, 1 spec., Y. Yokoi leg. ( KACO) .

Diagnostic description. Body length 6.05–6.53 mm, body width 2.39–2.63 mm. Ratios: pronotum width / length 1.18–1.25, elytra length / width 1.7–1.78, length elytra / length pronotum 2.65–2.80. Pronotum relatively short compared to elytra. Upper side of pronotum with woolly hairs which are not lined up and do not cover surface, on elytra relatively long hairs are lined up and inclined posteriorly (they may be partially abraded in old specimens). Large punctures of pronotum usually fused, in front of acute hind corners lateral margins are basally shallowly emarginate; anterior margin emarginate. Upper side in mature specimens nearly black, with golden shimmer, in immature specimens castaneous and in several specimens with dark patch on disc; hairs yellow. Antennomeres VIII–X drop-shaped, and antennomere X slightly longer than wide (approx. 7: 6). For aedeagus see Fig. 5b .

Differential diagnosis. This species is larger than other species from Borneo, which have length below 5 mm.

Distribution. Borneo, Java, Sumatra ( ARDOIN 1964d, MASUMOTO & MAKIHARA 1997).

Figures

Figs 5a–7b. Gonocnemis and Paragonocnemis spp. 5a–7a – habitus, dorsal views; 5b–7b – aedeagi, dorsal views. 5a, 5b – G. sericeus sericeus (Fabricius, 1801). 6a, 6b – P.(Borneogonocnemis) ardoini Bremer, 1991. 7a, 7b – P. (B.) ruficolor (Pic, 1936).