Bundoksia sibuyania, Lucañas, 2021

Lucañas, Cristian C., 2021, Bundoksia gen. nov. (Dictyoptera: Blattodea: Blattidae), a new sexually dimorphic cockroach from the Philippines, Journal of Natural History 55 (15 - 16), pp. 1009-1020 : 1016-1018

Species Bundoksia sibuyania n. sp. [ Figure 3 ]

Material examined. Holotype: ♂, pinned, genitalia slide-mounted. Original label: ‘ Philippines: Sibuyan Island: Mt. Guiting-guiting 03.vi.2016 C.C.Lucañas’ ‘UPLBMNH BLA-00674 ’, ‘ HOLOTYPE / Bundoksia sibuyania Lucañas’ [laser printed on red label].

Paratypes: 2 female, same locality as holotype but ‘... 03.iii.2015 J.C.B.Naredo’ ‘UPLB- MNH BLA-00675’; ‘... 19.vi.2017 C.C.Lucañas’ ‘ UPLB-MNH BLA-00708’; ‘... 26.i.2017 A.U. Supetran’ ‘ UPLB-MNH BLA-00709’. ‘ PARATYPE / Bundoksia sibuyania Lucañas’ [laser printed on blue label].

Diagnosis. Easily differentiated from its congener, B. rufocercata , by the entirely black colouration, the triangular tegmina of the female and the structure of the male genitalia. Description. Size (mm): ♂ TL: 18.85; BL: 15.05; Hd: 3.41 ± 0.13 × 3.17 ± 0.21; IOD: 0.69 ± 0.1; IAD: 1.36 ± 0.2; MP: 0.55 ± 0.02, 0.59 ± 0.01; 0.61 ± 0.04; Pn: 2.90 × 5.65; Tg: 16.40. ♀ TL: 15.72 ± 0.57; Pn: 3.84 ± 0.11 × 6.57 ± 0.09; Tg: 3.67 ± 0.28.

Male ( Figure 3 (a)): Vertex slightly exposed. Head black ( Figure 3 (c)). Ocelli present, beside the antennal socket. Pronotum black, trapezoidal, posterior margin rounded. Tegmina well developed, apically rounded, extending beyond the abdomen. Wings well-developed. Fore femur type A 2 with several elongate setae ( Figure 3 (e)). Mid femur and hind femur sparsely spined. Hind metatarsus distinctly longer than the remaining tarsomeres combined, armed with two rows of spine with minute apical pulvilli ( Figure 3 (f)). Tarsal claws simple, symmetrical.Arolium present. Hind margin of metathorax with mesal trapezoidal evagination, lateral base of which are shallowly excavated. First abdominal tergite with setose gland ( Figure 3 (d)). Succeeding abdominal tergites unspecialised. Supra-anal plate almost truncate, with slight mesal indentation ( Figure 3 (g)). Cerci elongate, terminally pointed. Subgenital plate symmetrical ( Figure 3 (h)). Style similarly sized. Male genitalia as illustrated ( Figure 3 (h)): L2 terminally acute; L4C with two patches of barb-like structure; L3 scythe-like, with distinct sub-apical tooth at the base of the notch; R1H membranous except for several tooth-like apical structures; R2 bulbous, with deep mesal invagination, anteriorly rounded, inner margin striated. R3 anterior portion acute. L4G (Ventral phallomere) reduced, anterior margin weakly sclerotised.

Female ( Figure 2 (b)): similar to males except for the following: Pronotum parabolic, posterior margin almost straight. Tegmina triangular, reaching up to the hind margin of metathorax. Hindwing reduced to triangular pads with little venation. Supra-anal plate truncate, symmetrical. Subgenital plate valvular.

Known distribution. Philippines: Sibuyan Island.

Etymology. Named after its type locality, Sibuyan Island.

Ecology. Little is known about the behaviour of this species. Unlike B. rufocercata , B. sibuyania were found singly on crevices of tree stumps. A single female specimen was caught in a pitfall trap.

Figures

Figure 2. Bundoksia rufocercata (Shelford 1911) comb. nov.: (a) Male habitus; (b) Female habitus; (c) Head; (d) Posterior margin of metanotum and 1st abdominal tergite; (e) Prothoracic leg; (f) Mesothoracic leg; (g) Metathoracic leg.; (h) Male supraanal plate; (i) Male genitalia and subgenital plate.

Figure 3. Bundoksia sibuyania Lucañas sp. nov.: (a) Male habitus; (b) Female habitus; (c) Head; (d) Posterior margin of metanotum and 1st abdominal segment; (e) Prothoracic leg; (f) Hind tarsomere; (g) Male supraanal plate; (h) Male genitalia and subgenital plate.