Neohirasea bispina bispina, bispina, 2018

Ho, Wai-Chun George, 2018, The genus Neohirasea Rehn (Phasmatodea: Diapheromeridae: Necrosciinae) from Vietnam, Zoological Systematics 43 (1), pp. 37-51 : 40-41

Neohirasea bispina bispina sp. nov. & subsp. nov. ( Figs 6–10 , 46–49 )

Diagnosis. This new species is similar to N. biserrata sp. nov., but can be easily diagnosed by one pair of spines on pronotum and unarmed median segment in male and indistinctly swollen medially mesonotum and lacking noticeable praeopercular organ on seventh abdominal sternum in female.

Description. Male. Body slender, distinctly much slender than female. Head oval, shorter than pronotum. Vertex flat. Posterior margin of occiput with 6 small swellings. Median longitudinal furrow distinct, lateral longitudinal furrows indistinct. Compound eyes rounded and small. Antennae long and filiform, sparsely covered with long bristles, surpassing apices of protarsi; scapus flattened at base, about 2 times as long as pedicellus; third segment longer than combined length of scapus and pedicellus. Thorax with very few small granules. Pronotum rectangular, longer than wide, anterior and posterior margins nearly truncate; transverse and longitudinal sulci crossing before middle area, with a pair of spines on anterior margin, apices pointing forwards. Mesonotum elongate, more than 3 times as long as pronotum, broadly emarginated medially; median longitudinal carina indistinct, with paired spines anteriorly, post-medially and posteriorly, also with a pair of short mediolateral spines, lateral margins with a few short spines. Mesopleurae with a medial spine near posterior area and a supra-coxal spine. Metanotum longer than median segment, with paired spines post-medially. Metapleurae with a medial spine and a supra-coxal spine. Median segment rectangular, longer than wide, unarmed. Eighth tergum almost as long as ninth tergum, with a small hump-like crest posteromedially. Anal segment longer than ninth tergum, with a broad Vshaped emargination on posterior margin. Poculum cup-shaped, posterior margin rounded and reaching posterior margin of ninth tergum. Cerci flattened, curved inwards, apices rounded and not surpassing posterior margin of anal segment. Vomer with posteriorly constricted apical part, apex distinctly pointed and slightly curved. Legs very slender and long, sparsely covered with short bristles. All femora thicker than corresponding tibiae, posteroventral and anteroventral carinae with 2 small serrations near apices. Profemora curved basally. All tibiae maculated, longer than corresponding femora.

Female. Similar to male, but distinctly larger and more robust. Head oval, as long as pronotum. Vertex and occiput flat. Posterior margin of head with 8 small swellings. Median longitudinal furrow distinct, lateral longitudinal furrows indistinct. Compound eyes oval and small. Antennae filiform and long, sparsely covered with short bristles; scapus flattened basally, almost as long as third segment; pedicellus shorter than scapus. Thorax rough, with wrinkles, granules and spines. Pronotum rectangular, longer than wide, anterior margin with a pair of short spines, apices pointing forwards, transverse and longitudinal sulci crossing just before middle area. Mesonotum constricted anteriorly and posteriorly, indistinctly swollen medially; median longitudinal carina indistinct, armed with paired spines anteriorly, medially and posteriorly, also with a pair of short mediolateral spines; lateral margins with a few short spines. Mesopleurae with a few short spines and a short supra-coxal spine. Metanotum longer than median segment, median longitudinal carina indistinct, with paired spines postmedially, lateral margins with a short spine post-medially. Metapleurae with a medial spine and 2 supra-coxal spines. Abdomen wrinkled, distinctly tapering posteriorly. Median segment wider than long, with paired spines post-medially. Seventh sternum lacking noticeable praeopercular organ. Ninth tergum shorter than eighth tergum, with a small dorsoventrally flattened crest posteromedially. Anal segment longer than ninth tergum, almost as long as eighth tergum, with 2 small emarginations on posterior margin. Subgenital plate mediolongitudinally carinate, scoop-shaped, apex pointed and not reaching posterior margin of anal segment. Cerci small, flattened, apices pointed and not surpassing posterior margin of anal segment. Legs slender and long, maculated, covered with short bristles. All femora thick-built, thicker than corresponding tibiae. Profemora curved basally. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of all femora with 2 small serrations near apices. All tibiae unarmed, longer than corresponding femora.

Measurements. Length. Body, ♂ 48.0–51.0 mm, ♀ 60.0–62.0 mm; antennae, ♂ 45.0–48.0 mm, ♀ 39.0–41.0 mm; head, ♂ 3.0– 3.5 mm, ♀ 5.0 mm; pronotum, ♂ 3.5–4.0 mm, ♀ 5.0 mm; mesonotum, ♂ 12.0–13.0 mm, ♀ 14.0 mm; metanotum, ♂ 4.0 mm, ♀ 4.5–5.0 mm; median segment, ♂ 2.0– 2.5 mm, ♀ 3.0 mm; profemora, ♂ 17.0 mm, ♀ 17.0 mm; mesofemora, ♂ 14.0 mm, ♀ 14.0mm; metafemora, ♂ 20.0–21.0mm, ♀ 19.0–20.0 mm; protibiae, ♂ 20.0 mm, ♀ 18.0–20.0 mm; mesotibiae, ♂ 15.0 mm, ♀ 15.0–16.0 mm; metatibiae, ♂ 23.0–24.0mm, ♀ 23.0–25.0 mm.

Material examined. Holotype ♂, North Vietnam, NaHang Nature Reserve, In cleared area in 2° forest (22°16'– 22°31'N, 105°22'– 105°29'E), 15 July 1996, M.J. Hill, F3309.14, VN9603 P.10 ( MMUE) . Paratypes. 1♀, North Vietnam, NaHang Nature Reserve, In 2° forest not on plant (22°16'– 22°31'N, 105°22'– 105°29'E), 17 July 1996, M.J. Hill, F3309.12, VN9603 P.21 ( MMUE) ; 1♀, North Vietnam, NaHang Nature Reserve, In 2° forest nr camp on Rubiaceae (22°16'– 22°31'N, 105°22'– 105°29'E), 20 July 1996, M.J. Hill, F3309.13, VN9603 P.24 ( MMUE) ; 1♂, 1♀, North Vietnam, NaHang Nature Reserve, Forest transect 1 on Rhamnaceae (22°16'– 22°31'N, 105°22'– 105°29'E), 30 July 1996, M.J. Hill, F3309.10–11, VN9603 P.40–41 ( HKES) .

Distribution. Vietnam.

Etymology. The specific epithet of this new species is derived from the two spines on the anterior margin of pronotum in both sexes.

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 38–50. Neohirasea spp. 38–45.N. biserrata sp. nov. 46–49.N. bispina bispina sp. nov. & subsp. nov. 50. N. bispina babeensis subsp. nov. 38, 46, 50. Male habitus. 39, 47. Female habitus. 40. Egg, lateral view. 41. Egg, dorsal view. 42, 48. Male head and thorax, dorsolateral view. 43, 49. Female head and thorax, dorsolateral view. 44. Female end of abdomen, ventral view. 45. Female head and thorax, dorsal view. Scale bars: 38–39, 42–50=5mm; 40–41=1mm.