Neohirasea hilli nahangensis, Ho, 2018

Ho, Wai-Chun George, 2018, The genus Neohirasea Rehn (Phasmatodea: Diapheromeridae: Necrosciinae) from Vietnam, Zoological Systematics 43 (1), pp. 37-51 : 44-46

Neohirasea hilli nahangensis subsp. nov. ( Figs 28–29 , 61, 63 )

Diagnosis. This new subspecies is similar to the nominate N. hilli hilli sp. nov. & subsp. nov. and N. hilli vietnamensis subsp. nov., but can be diagnosed by anteriorly curved spines on anterior margin of pronotum, three pairs of spines on mesonotum, posteriorly emarginated poculum and posteroventral and anteroventral carinae of profemora with three small serrations near apices.

Description. Male. Head as in nominate race. Compound eyes oval and small. Antennae incomplete; scapus flattened at base, 2 times as long as pedicellus, roughly as long as third segment. Thorax rough, with sparse granules and short wrinkles. Pronotum rectangular, longer than wide, anterior margin weakly incurved, posterior margin truncate; transverse and longitudinal sulci crossing at middle area, with a pair of curved spines on anterior margin, apices pointing forwards. Mesonotum rough, more than 3 times as long as pronotum, gently expanded posteriorly in second half; median longitudinal carina indistinct, with paired spines anteriorly, post-medially and posteriorly. Mesopleurae with very few granules. Metanotum with paired spines near middle area, longer than median segment. Metapleurae with a supra-coxal spines. Median segment square, unarmed. Second tergum with a pair of short tubercles, other tergites unarmed. Eighth tergum almost as long as ninth tergum. Anal segment broader wider than long, longer than ninth tergum, lateral margins elevated medially, posterior margin with a small emargination. Poculum cup-shaped, posterior margin emarginated and surpassing anterior margin of anal segment. Cerci flattened, apices rounded and surpassing end of anal segment. Legs slender and long, sparsely covered with short bristles. All femora thicker than corresponding tibiae, anterodorsal, posterodorsal, anteroventral and posteroventral carinae indistinctly waved. Profemora curved basally, anteroventral and posteroventral carinae with 3 small serrations near apices. Anteroventral and posteroventral carinae of mesofemora and metafemora with 2 small serrations near apices.

Female. Unknown.

Measurements. Length. Body, ♂ 33.0 mm; head, ♂ 3.5 mm; pronotum, ♂ 2.5 mm; mesonotum, 8.0 mm; metanotum, ♂ 2.5 mm; median segment, ♂ 2.0 mm; profemora, ♂ 8.5 mm; mesofemora, ♂ 7.0 mm; metafemora, ♂ 9.0 mm; protibiae, ♂ 9.0 mm; mesotibiae, ♂ 7.5 mm; metatibiae, ♂ 10.5mm.

Material examined. Holotype ♂, North Vietnam, NaHang Nature Reserve (22°16'– 22°31'N, 105°22'– 105°29'E), 1996, M.J. Hill, F3309.75 ( MMUE).

Distribution. Vietnam.

Remarks. The antennae of holotype is incomplete and its measurements are insufficiently provided.

Etymology. The specific epithet of this new subspecies is derived from the type locality, NaHang Nature Reserve in North Vietnam.

Figures

Figures 1–37. Neohirasea spp. 1–5. N. biserrata sp. nov. 6–10. N. bispina bispina sp. nov. & subsp. nov. 11–12. N. bispina babeensis subsp. nov. 13–17. N. catbaensis sp. nov. 18–23. N. coomani sp. nov. 24–27. N. hilli hilli sp. nov. & subsp. nov. 28–29. N. hilli nahangensis subsp. nov. 30–32. N. hilli vietnamensis subsp. nov. 33–37. N. maerens pseudomaerens subsp. nov. 1, 6, 11, 13, 22, 24, 28, 30, 33. Male end of abdomen, lateral view. 2, 7, 12, 15, 23, 25, 29, 32, 34. Male end of abdomen, dorsal view. 3, 8, 14, 31, 35. Male vomer, ventral view. 4, 9, 16, 18, 26, 36. Female end of abdomen, lateral view. 5, 10, 17, 19, 27, 37. Female end of abdomen, dorsal view. 20. Female end of abdomen, ventral view. 21. Female mesonotum, dorsal view. Scale bars: 1–2, 4–7, 9–13, 15–30, 32– 34=5mm; 3, 8, 14, 31, 35=1mm.

Figures 57–68. Neohirasea spp. 57–60. N. hilli hilli sp. nov. & subsp. nov. 61, 63. N. hilli nahangensis subsp. nov. 62, 64. N. hilli vietnamensis subsp. nov. 65–68. N. maerens pseudomaerens subsp. nov. 57, 61–62, 65. Male habitus. 58, 66. Female habitus. 59, 63– 64, 67. Male head and thorax, dorsolateral view. 60, 68. Female head and thorax, dorsolateral view. Scale bars=5mm.