Delacampius siberutensis, Stehlík & Jindra, 2008

Stehlík, Jaroslav L. & Jindra, Zdeněk, 2008, New taxa of the Largidae and Pyrrhocoridae (Hemiptera: Heteroptera) from the Oriental Region, Acta Entomologica Musei Nationalis Pragae 48 (2), pp. 611-648 : 615-616

publication ID	https://doi.org/ 10.5281/zenodo.5341841
persistent identifier	https://treatment.plazi.org/id/03EB782C-FFA0-0F58-FE3E-E956D70F00E3
treatment provided by	Felipe
scientific name	Delacampius siberutensis
status	sp. nov.

Treatment

Delacampius siberutensis View in CoL sp. nov.

( Figs. 4 View Figs , 11 View Figs )

Type material. HOLOTYPE: J (macropterous), INDONESIA: MENTAWAI ISLANDS: SIBERUT: Salappa env., 50-100 m a.s.l., iv.-v.2006, S. Jakl lgt. ( PPUA) . PARATYPES: The same data, 4 JJ 8 ♀♀ ( ZJPC) ; SIBERUT: Mt. Malancan , 200 m a.s.l., 17.-20.i.2004, 1 J, S. Jakl lgt. ( ZJPC) ; Boiacan env., v.2004, 2 JJ, S. Jakl lgt. ( MMBC: coll. P. Baňař) ; the same locality, xi.2004, 1 J 2 ♀♀, S. Jakl lgt. ( ZJPC) .

Additional material examined. INDONESIA: SUMATRA: SUMATERA UTARA PROVINCE: Panyabungan, 0°48′38″N 99°34′07″E, 18.ii.2002, 1 J, T. Kothe leg. ( ZSMC).

Description. Colouration ( Fig. 4 View Figs ). Body black. Lateral pronotal margin, pronotal epipleuron, stripe on outer part of corium, hypocostal lamina and laterotergirtes red. Antennomere 4 whitish, only on base and apex narrowly black. Red lateral stripe on corium occupying its costal margin, basally somewhat extended on corium, regularly widening towards apex of corium, ending just before corial apex.

Structure. Known only in macropterous form. Head wider, less elongate in front of eyes. Lateral pronotal margins very narrow, medially concave; callar lobe wider; strigil not developed. Labium slightly surpassing anterior margin of ventrite III. Profemora along their entire length with minute denticles ventrally and with two (rarely only one) larger teeth in apical part. Pygophore similar to D. parvulus sp. nov., only ventral half of ventral wall slighly gibbous in lateral view. Paramere ( Fig. 11 View Figs ).

Punctation on pronotal lobe and scutellum distinct and dense, on clavus and corium dwindling in black colouration, only with sparse black punctures near inner margin of redcoloured margin of corium.

Pilosity. Body covered with semierect greyish hairs.

Measurements (all in mm). Males (n = 5). Body length 7.22 (6.80-7.67); head: length 0.98 (0.92-1.03), width (including eyes) 1.39 (1.35-1.43), interocular width 0.75 (0.70-0.81); lengths of antennomeres: 1 – 1.09 (1.03-1.13), 2 – 1.12 (1.03-1.19), 3 – 0.67 (0.65-0.70), 4 – 1.71 (1.67-1.73); pronotum: length 1.37 (1.24-1.48), width 2.41 (2.21-2.54); scutellum: length 1.12 (1.05-1.19), width 1.25 (1.19-1.40); corium: length 3.60 (3.35-4.00), width 1.34 (1.24-1.40).

Females (n = 5). Body length 8.01 (7.72-8.64); head: length 1.04 (0.97-1.13), width (including eyes) 1.50 (1.46-1.62), interocular width 0.75 (0.70-0.81); lengths of antennomeres: 1 – 1.23 (1.19-1.35), 2 – 1.19 (1.08-1.24), 3 – 0.79 (0.76-0.92), 4 – 1.80 (1.73-1.94); pronotum: length 1.37 (1.32-1.51), width 2.56 (2.43-2.75); scutellum: length 1.27 (1.19-1.35), width 1.39 (1.30-1.46); corium: length 4.02 (3.78-4.43), width 1.45 (1.40-1.57).

Variation. The single male from Sumatra differs from the Siberut population by its distinctly smaller size. Its measurements are (all in mm): body length 5.83; head: length 0.76, width (including eyes) 1.19, interocular width 0.76; lengths of antennomeres: 1 – 0.92, 2 – 0.97, 3 – 0.59, 4 – 1.30; pronotum: length 0.97, width 1.94; scutellum: length 0.94, width 1.08; corium: length 2.92, width 1.19. However, more specimens from both Sumatra and Siberut are needed to evaluate these differences.

Differential diagnosis. Similar to D. villosus (Breddin, 1901) , known from Laos, Sumatra, and Sulawesi ( STEHLÍK 2005a), which has a slightly narrower head and callar lobe but wider lateral margins of the pronotum. Both species also differ in the shape of the red stripe on the outer corial margin: it is distinctly narrowing towards the corial apex in D. villosus but widening towards the corial apex in D. siberutensis sp. nov.

Etymology. Patronymic, named after the Siberut Island.

Distribution. Indonesia, Mentawai Islands (Siberut), and Sumatra.