Oligotoma humbertiana
Creators: name: Lucañas, Cristian C.
name: Lit, Ireneo L.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Embioptera
Oligotomidae
Oligotoma
Oligotoma humbertiana

description: Species Oligotoma humbertiana (Saussure 1896)
Fig. 3
Embia humbertiana Saussure 1896: 353 (Holotype: Ceylon (now Sri-Lanka), Museum d"Histoire Naturelle, Geneva). Oligotoma humbertiana: Davis 1939: 186; Ross 1940: 674; Ross 1944: 496; Ross 1955: 6; Ananthasubramanian 1956: 226; Kapur and Kripalani 1957: 120; Bradoo 1971: 264; Ross 1978: 6; Ross 2006: 341; Poolprasert 2012: 410; Chandra and Dawn 2014: 1565.
Material examined. 3 males, 3 females, Philippines: Luzon: Los Baños, Laguna; on Sweetenia macrophylla King, 15-iii-2014 (C.C.Lucañas, UPLBMNH EMB-00006♂); on Roystonea regia (Kunth) O.F.Cook, 15-i-2014 (C.C.Lucañas, UPLBMNH EMB-00009♂); on Cynometra ramiflora L., 9-viii-2014 (C.C.Lucañas, UPLBMNH EMB-00017♂ - 00018♀); on Cassia fistula L., 25-vi-2014 (C.C.Lucañas, UPLBMNH EMB-00019♀); on Pterocarpus indicus Willd., 27-vi-2014 (C.C.Lucañas, UPLBMNH EMB-00020♀)
Distribution: Indian in origin, now widespread.
Diagnosis: Oligotoma humbertiana is distinguished from other Oligotoma species by the small apical process on the narrow, curved 10RP and the bifid 10LP.
Description: Size (mm): ♂ BL: 7.9 ± 0.74; HL × HW: 1.2 ± 0.06 x 1.0 ± 0.15; OR: 0.36 ± 0.01 Fw: 4.1 ±0.1; Hw: 4.6 ± 0.36. ♀ BL: 7.9 ± 0.74; HL × HW: 1.2 ± 0.06 x 1.1 ± 0.06.
Alate male (Fig. 3A) varying from light to dark brown. Antennae filiform, covered with setae. Mandibles conspicuous. Incisor darkly pigmented, three on left, two on right. Submentum semiquadrate, with anterior side deeply convex (Fig. 3C). Pronotum concolorous with abdomen. Hind basitarsus with single papilla (Fig. 3D). Abdomen black-brown. Terminalia (Figs. 3E, F): LCB laterally elongate, encircling inner sides of LC. 10LP broad basally narrowing and curving leftward, with minute bifurcated teeth. 10RP with distinct subapical process. H broad basally. HP narrowing to blunt edge. LPPT narrow horizontal hook.
Female (Fig. 3B) generally dark brown to black. Head sometimes reddish. Hind basitarsus with single papilla. Sternite 8 mostly unpigmented with U–shaped pigment medially and posterolateral markings (Fig. 3G). Sternite 9 unpigmented anteriorly with anteromedial and lateral macula (Fig. 3G).
Remarks. Oligotoma humbertiana is considered a “weed” species and has been introduced to the Philippines and other countries such as Mexico via the Manila Galleon trade (Ross 1984), China, Indonesia (Ross 2000), Hongkong, Mariana Islands, Taiwan and Thailand (Poolprasert 2012).
The observed specimens agree with the previous descriptions of the species except for specimens described by Chandra & Dawn (2014) from India, which greatly differ in the curvature of 10RP; other than that character other structures are similar. It is possible that the Chandra & Dawn specimens represent a different subspecies of O. humbertiana or a completely different species.
description: Published as part of Lucañas, Cristian C. & Lit, Ireneo L., 2018, Oligotomidae (Insecta: Embioptera) of Mt. Makiling, Los Baños, Philippines, with description of a new species, pp. 173-182 in Zootaxa 4415 (1) on page 178, DOI: 10.11646/zootaxa.4415.1.9, http://zenodo.org/record/1241833