Neohirasea coomani, Ho, 2018

Ho, Wai-Chun George, 2018, The genus Neohirasea Rehn (Phasmatodea: Diapheromeridae: Necrosciinae) from Vietnam, Zoological Systematics 43 (1), pp. 37-51 : 42-43

Neohirasea coomani sp. nov. ( Figs 18–23 , 55–56 )

Diagnosis. This new species is similar to N. biserrata sp. nov., but can be separated by indistinctly waved femora in both sexes, a pair of medial spines on mesonotum in male and broadly flattened praeopercular organ on seventh abdominal sternum in female.

Description. Female. Similar to male, but distinctly larger and more robust. Head oval, almost as long as pronotum. Occiput and vertex flat. Posterior margin of head with 8 small swellings. Median longitudinal furrow distinct. Compound eyes oval and small. Genae with a short carina behind compound eyes. Antennae broken, sparsely covered with short bristles; scapus with indistinct median elevation, flattened basally, longer than third segment; pedicellus slightly as long as third segment. Thorax rough, with wrinkles, granules and tubercles. Pronotum rectangular, longer than wide, anterior margin with a pair of short tubercles, apices pointing forwards, transverse and longitudinal sulci crossing just before middle area. Mesonotum with wrinkles and small granules, weakly constricted anteriorly, distinctly swollen medially and weakly narrowing in posterior half; median longitudinal carina distinct, middle area armed with a pair of short tubercles; lateral margins with a few small and short tubercles. Mesopleurae with a few short tubercles and a short supra-coxal tubercle. Metanotum slightly longer than median segment, median longitudinal carina distinct. Metapleurae with a short supra-coxal tubercle. Abdomen wrinkled, distinctly tapering posteriorly. Seventh sternum with broadly flattened praeopercular organ, posterior margin truncate, posterolateral angles rounded. Ninth tergum as long as eighth tergum, with a small crest posteromedially. Anal segment as long as ninth tergum, with 2 small emarginations on posterior margin. Subgenital plate mediolongitudinally carinate, scoop-shaped, apex pointed and reaching posterior margin of anal segment. Cerci small and short, flattened, apices pointed and not surpassing posterior margin of anal segment. Legs covered with short bristles. All femora thick-built, thicker than corresponding tibiae. Profemora curved basally. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of mesofemora and metafemora waved with indistinct elevations.

Male. Body robust, smaller and much slender than female. Head oval, as long as pronotum. Vertex flat. Posterior margin of occiput with indistinct swellings. Median and lateral longitudinal furrows distinct. Compound eyes oval and small. Antennae incomplete, filiform, sparsely covered with short bristles; scapus flattened at base, 1.5 times as long as pedicellus; third segment longer than combined length of scapus and pedicellus. Thorax rough, with sparse granules. Pronotum rectangular, longer than wide, slightly longer than head; anterior margin truncate, with a pair of small spines, posterior margin rounded; transverse and longitudinal sulci crossing at middle area. Mesonotum rough, about 3 times as long as pronotum, gently expanded posteriorly in second half; median longitudinal carina distinctly elevated, with a pair of short spines medially. Mesopleurae with a short tubercle near posterior area and a supra-coal tubercle. Metanotum trapezoidal, gently narrowing posteriorly, with distinctly elevated median longitudinal carina, longer than median segment. Metapleurae with a short supra-coxal tubercle. Median segment square. Eighth tergum gently expanded posteriorly, as long as ninth tergum. Anal segment roughly as long as ninth tergum, with a small indistinct emargination on posterior margin. Poculum cup-shaped, posterior margin rounded and reaching posterior margin of ninth tergum. Cerci flattened, apices rounded and not surpassing posterior margin of anal segment. Legs slender and long, sparsely covered with short bristles. All femora thicker than corresponding tibiae, anterodorsal and posterodorsal carinae waved with indistinct elevations. Profemora curved basally, longer than mesonotum.

Measurements. Length. Body, ♂ 39.0 mm, ♀ 45.0 mm; head, ♂ 2.5 mm, ♀ 4.0 mm; pronotum, ♂ 2.5 mm, ♀ 3.5 mm; mesonotum, ♂ 8.0 mm, ♀ 9.5 mm; metanotum, ♂ 2.5 mm, ♀ 2.5 mm; median segment, ♂ 2.0 mm, ♀ 2.0 mm; profemora, ♂ 11.0 mm, ♀ 10.5 mm; mesofemora, ♂ 9.0 mm, ♀ 8.5 mm; metafemora, ♂ 13.5 mm, ♀ 12.5 mm; protibiae, ♂ 12.5 mm, ♀ 11.0 mm; mesotibiae, ♂ 10.0 mm, ♀ 9.0 mm; metatibiae, ♂ 15.5 mm, ♀ 14.5 mm.

Material examined. Holotype ♀, Tonkin (North Vietnam), Hoa Binh, no date data, A.De Cooman ( IZCAS). Paratypes 2♂, same data as holotype ( IZCAS) .

Distribution. Vietnam.

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

Etymology. It is named in honour of A. De Cooman for his discovery of this new species.

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 51–56. Neohirasea spp. 51–54. N. catbaensis sp. nov. 55–56. N. coomani sp. nov. 51, 56. Male habitus. 52, 55. Female habitus. 53. Male head and thorax, dorsolateral view. 54. Female head and thorax, dorsolateral view. Scale bars=5mm.