(Figs 19, 28–31, 47, 119–124)
Hallodapus brunneus Poppius, 1915 (misidentification): YASUNAGA et al.
(2013a): 442 (checklist).
Type material. HOLOTYPE: ♁, THAILAND: NAKHON NAYOK: Sarika (at garden lawn), 14°18′07″N 101°18′09″E, at FL light, 20 Dec 2010, T. Yasunaga (AMNH _ PBI 00380633) (DOAT). Additional specimen examined. THAILAND: NAKHON RATCHASIMA: Wang Nam Khiew, Sakaerat Environmental Research Station, 14°30′27″N, 101°55′39″E, 410 m alt., UV light trap, 20 Aug 2008, T. Yasunaga, 1 ♁ (TYCN).
Differential diagnosis. Superficially most similar to H. brunneus (Poppius) (Fig. 20), from which the present new species (Fig. 19) can be distinguished by the larger anterior pair of white maculae contiguous to each other (Fig. 28), totally fuscous femora, narrowly distributed MFP with each plectrum somewhat ovoid (Figs 47, 123), presence of pygophoral spine (Figs 30, 124), and C-shaped endosoma (Fig. 30) with an apically bulbous process near the apex (Fig. 31). In H. brunneus, the maculae of the anterior pair are smaller and separated each other, bases of meso- and metafemora are creamy white, FWS is rather sparsely distributed (Fig. 110), MFP is more widely distributed and each plectrum squared (Figs 40, 111), pygophore lacks any spine, and endosomal subapical process is short and thickened (Fig. 178).
Description. Male (holotype). Macropterous; body generally dark brown, almost medium-sized, elongate, parallel-sided (Figs 19, 28); dorsal surface weakly shining, with uniformly distributed, woolly, reclining setae and sparsely distributed, dark, simple, semierect setae. Head tinged with red, pointed in front; eyes small, less than half as wide as vertex in dorsal view. Antenna pale brown; segment I dark brown, with yellow fascia inward; segment II slightly darkened, inwardly with a weak stripe that is nearly invisible in dry-preserved specimen, subequal in length to III; segment IV about twice as long as I. Labium reddish brown, reaching but not exceeding apex of metacoxa; segment III and base of IV pale brown. Pronotum weakly shining, weakly constricted laterally at calli; pleura shiny dark reddish brown; scent efferent system with knob-like ostiolar peritreme (Fig. 121). Hemelytron with two pairs of white maculae as in Fig. 28 (anterior pair of maculae larger, contiguous to each other and posterior macula squared); FWS as in Figs 29, 122; membrane pale smoky brown. Coxae and femora dark brown, except for meso- and metacoxae yellowish brown; MFP rather narrowly distributed, with each plectrum rectangular (Figs 47, 123). Abdomen wholly reddish dark brown, relatively long. Male genitalia (Figs 30–31, 124): Pygophore with a distinct pygophoral spine (Fig. 30); endosoma C-shaped (Figs 30, 124), with an apically bulbous process near the apex (Fig. 31).
Measurements. Male (holotype, mm): Total length of body 2.94; head width including eyes 0.55; vertex width 0.32; lengths of antennal segments I–IV 0.35, 1.05, 1.01, 0.69; total labial length 1.25; basal width of pronotum 0.81; maximum width across hemelytron 0.92; and lengths of metafemur, tibia and tarsus 1.05, 1.52, 0.39.
Female. Unknown.
Etymology. From Latin, spinosus [= spiny, thorny], referring to a characteristic ventral spine on the pygophore of this new species; an adjective.
Biology. Unknown; habitat environment as in Fig. 2.
Comment. YASUNAGA et al. (2013b) reported H. brunneus from Thailand, but the present examination revealed the Thai specimen represents an undescribed species herein documented as H. spinosus sp. nov. which is unique by having a noticeable pygophoral spine (see Table 1).