Species Aposthonia borneensis (Hagen 1885)

Fig. 1

Oligotoma borneënsis Hagen 1885: 146 (as “ O. saundersii Westwood ”) (Lectotype male: Telang Borneo, Museum of Comparative Zoology, designated by Davis 1940: 371); Krauss 1911: 39 (= “ O. saundersii Westwood ”); Davis 1940: 371; Ross 1943: 102; Ross 1948: 100.

Aposthonia vosseleri Krauss 1911: 48; Friederichs 1934: 409.

Oligotoma vosseleri (Krauss): Enderlein 1912: 101; Silvestri 1912: 334.

Aposthonia vosseleri vosseleri Friederichs 1934: 410.

Aposthonia vosseleri intermedia Friederichs 1934: 410; Davis 1940: 374. Aposthonia vosseleri obscura Friederichs 1934: 412; Davis 1940: 375.

Oligotoma jacobsoni Silvestri 1912: 334; Davis 1940: 373.

Oligotoma maerens Roepke 1919: 5; Davis 1940: 374.

Oligotoma nana Roepke 1919: 5; Davis 1940: 374.

Aposthonia vosseleri nana (Roepke): Friederichs 1934: 412.

Oligotoma masi Navás 1923: 39 (Type: Vigan, Luzon, Philippines, Paris Museum); Navás 1932: 923; Davis 1940: 374. Aposthonia vosseleri jacobsoni (Silvestri): Friederichs 1934: 411.

Aposthonia borneensis: Ross 1978: 5; Yang 1999: 66; Ross 2000: 30; Ross 2007: 592; Poolprasert et al. 2011: 40.

Material examined. 3 males, 3 females, Philippines: Luzon, Los Baños, Laguna; on Casuarina equisetifolia L., 10-ii-2014 (C.C.Lucañas, UPLBMNH EMB-00005 ♂); on Mangifera indica L., 18-ii-2014 (C.C.Lucañas, UPLBMNH EMB-00010 ♂); on Sandoricum koetjape (Burm. f.) Merr., 27-ix-2014 (C.C.Lucañas, UPLBMNH EMB-00024 ♂ -00025 ♀); on Cassia fistula L., 20-x-2014 (C.C. Lucañas, UPLBMNH EMB-00026 ♀) on Samanea saman F. Muell., 20-x-2014 (C.C.Lucañas, UPLBMNH EMB-00027 ♀).

Distribution. China, South East Asia and Papua New Guinea (Poolprasert et al. 2011)

Diagnosis. Aposthonia borneensis is distinguished from other Aposthonia spp. by the distally rounded 10LP and a narrow LPPT with a small apical hook.

Description. Size (mm): ♂ BL: 8.3 ± 0.79; HL × HW: 1.4 ± 0.15 × 1.2 ±0.06; OR: 0.50 ± 0.01; Fw: 6.3 ± 0.1; Hw: 5.2 ± 0.17. ♀ BL: 9.7 ± 0.84; HL × HW: 1.4 ± 0.1 x 1.2 ± 0.06

Male alate (Fig. 1A). Body generally black except for orange pronotum. Head brown anteriorly fading to light brown/orange posteriorly. Antenna filiform. Antennal segments covered with long setae. Submentum retuse, deeply convex antero-medially (Fig. 1C). Pronotum light brown-orange. Hind basitarsomere with conspicuous single papilla (Figure 1D). Abdomen generally dark grey, terminalia darker. Terminalia (Figs. 1E, F): LC1 distally dilated and lobed; LCB encircling LC as narrow sclerotized plate. 10LP elongate, slender, distally rounded (Fig. 1G). 10RP with minute subapical tooth. H proximally broad, narrow distally to rounded simple HP. LPPT deeply sclerotized, ending with inward pointing hook (Fig. 1H).

Female (Fig. 1B) similar to nymphs but body distinctly black with red-orange prothorax. Eighth sternite with two oblique, unpigmented lines (Fig. 1I). Ninth sternite unpigmented medially (Fig. 1I).

Remarks. A. borneensis is a widely distributed species (primarily due to anthropogenic causes) and was first reported in the country by Navas (1923). He described it as Oligotoma masi which was later synonymized with A. borneensis (Ross 1943). Poolprasert et al. (2011) suggested that it was anthropogenically introduced to the many south and Southeast Asian countries.