Medauroidea fasciata, Ho, 2020

Ho, Wai-Chun George, 2020, New taxa of Clitumninae from Vietnam (Phasmatodea: Phasmatidae), Zoological Systematics 45 (2), pp. 104-117 : 110-111

Medauroidea fasciata sp. nov. ( Figs 13–16 , 51–60 )

Diagnosis. This new species is similar to Medauroidea cornuta sp. nov., but can be separated by its larger size in the both sexes, the indistinct horns on the vertex of head and the rough thorax and abdomen in the female and more robust thorax and shorter anal abdominal segment in the male.

Description. Female. Body elongate, slender and long, distinctly larger and more robust than male. General colouration of body brown, with dark brown longitudinal stripes dorsally, legs brown. Head sparsely granulated. Oval, longer than wide, gently tapering posteriorly behind compound eyes. Vertex weakly convex, with a transverse carina between compound eyes, also elevated with a pair of obscure, hump-like horns on the carina. Occiput flat, median and lateral longitudinal furrows distinct, posterior margin weakly raised, with six small swellings. Compound eyes small and rounded, its length about five times of genae. Antennae short, with 23 segments, reaching middle point of profemora; scapus flattened, constricted anteriorly and posteriorly, longer than combined length of pedicellus and third segment; and pedicellus shorter than third segment. Thorax rough, sparsely and obscurely covered with small granules, also interspersed with a few enlarged granules. Pronotum trapezoidal, gently expanded posteriorly, shorter than head, anterior margin incurved, posterior margin nearly truncate, transverse and longitudinal sulci crossing at middle point. Mesonotum parallel-sided, longer than combined length of metanotum and median segment. Metanotum longer than median segment. Abdomen cylindrical, rough, sparsely and obscurely covered with small granules, also interspersed with a few enlarged granules. Median segment rectangular, wider than long. Seventh tergum with laterally expanded lobe. Seventh sternum lacking noticeable praeopercular organ. Eighth tergum longer than ninth tergum. Ninth tergum with a small crest posteromedially. Anal segment as long as ninth tergum, posterior margin with a broad V-shaped emargination, posterolateral angles obtuse, median longitudinal carina weakly elevated. Supra-anal plate distinct, small, posterior margin rounded and exceeding posterolateral angles of anal segment. Subgenital plate scoop-shaped, mediolongitudinally carinate, posterior apex pointed and reaching middle area of anal segment. Cerci short, flattened, apices obtuse and not surpassing posterior margin of anal segment. Legs slender and long. Femora thicker than corresponding tibiae. Profemora curved basally, anterodorsal and posteroventral carinae with dense and small serrations, other carinae unarmed. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of mesofemora and metafemora with sparse and small serrations. Posterodorsal carina of mesofemora also with a rounded and small lamella subbasally. Anterodorsal, posterodorsal, anteroventral and posteroventral carinae of tibiae with small, toothlike spines. Posterodorsal carina of mesotibiae also with a rounded and small lamella subbasally.

Male. Body slender and slim, distinctly smaller and slenderer than female. General colouration of body brown or dark brown, legs brown or reddish brown, with blackish markings. Head oval, gently tapering posteriorly behind compound eyes. Vertex with a transverse carina between compound eyes, also elevated with a pair of small horns on the carina or lacking horns. Occiput with distinct median and lateral longitudinal furrows, posterior margin weakly raised, with four small swellings. Compound eyes small and rounded, its length about four times of genae. Antennae short, with 24 segments, apices reaching subapical area of profemora; scapus flattened, constricted anteriorly and posteriorly, almost as long as third segment, longer than pedicellus. Thorax covered with very few granules. Pronotum nearly trapezoidal, gently expanded posteriorly, anterior margin incurved, posterior margin almost truncate, transverse and longitudinal sulci crossing at middle point. Mesonotum longer than combined length of metanotum and median segment, broadly emarginated medially. Metanotum longer than median segment. Abdomen slender and cylindrical. Median segment rectangular, longer than wide. Third to eighth tergites with a small anterolateral hump. Eighth tergum expanded posteriorly, longer than ninth tergum. Anal segment elongated, as long as eighth tergum, dilated into two semi-tergites; semi-tergites straight, medially tapering posteriorly, inner margin with minute dentations, apices obtuse. Poculum small, cup-shaped, posterior margin rounded and reaching posterior area of ninth tergum. Cerci flattened, short, apices obtuse and not exceeding posterior apices of anal segment. Legs slender and long. Femora thicker than corresponding tibiae. Profemora curved basally, anterodorsal and posteroventral carinae with sparse and small serrations, other carinae unarmed. Anterodorsal and posterodorsal carinae of mesofemora and metafemora with three small serrations, anteroventral and posteroventral carinae unarmed, medioventral carina with one to two small serrations subapically. Posteroventral carina of protibiae with a few spines, other carinae unarmed. Anteroventral and posteroventral carinae of mesotibiae and metatibiae with a few spines, other carinae unarmed.

Measurements. Length. Body, ♀ 100.0–103.0mm, ♂ 82.0–90.0 mm; antennae, ♀ 14.0–15.0 mm, ♂ 24.0–26.0mm; head, ♀ 6.5–7.0 mm, ♂ 4.0– 4.5 mm; pronotum, ♀ 4.0– 4.5 mm, ♂ 3.0– 3.5 mm; mesonotum, ♀ 24.0 mm, ♂ 19.0–21.0 mm; metanotum, ♀ 13.0–14.0 mm, ♂ 13.0–14.0 mm; median segment, ♀ 3.0 mm, ♂ 2.0–3.0 mm; profemora, ♀ 34.0–40.0 mm, ♂ 36.0–44.0mm; mesofemora, ♀ 22.0–24.0mm, ♂ 22.0–27.0 mm; metafemora, ♀ 30.0–31.0 mm, ♂ 30.0–35.0 mm; protibiae, ♀ 40.0–46.0 mm, ♂ 44.0–50.0 mm; mesotibiae, ♀ 22.0–25.0 mm, ♂ 27.0–32.0 mm; metatibiae, ♀ 32.0–37.0 mm, ♂ 37.0– 42.0 mm.

Egg. Capsule brown, rough, weakly wrinkled and inconspicuously granulated; oval, posteriorly pole rounded, with a ‘中’-shaped marking dorsally. Micropylar plate nearly rounded. Micropylar cup placed at posterior margin of micropylar plate. Median line long. Operculum marginally elevated, centrally elevated with a close-stalked capitulum, apically rounded. Measurements. Capsule length 3.0 mm, width 1.5 mm, height 1.8 mm. Material examined. Holotype ♀, Vietnam, Thua Thien Hue, Bachma Mountain, 19 September 2016, He Li ( HKES) . Paratypes. 1♀, 1♂, 16 eggs, same data as holotype ( HKES) ; 1♀, 2♂, Vietnam, Thua Thien Hue , Phu Loc , Bach Ma (elev. 150 m), 27 September 2011, Liu Xingyue ( CAU & HKES) . Distribution. Vietnam. Etymology. The specific epithet of this new species is derived from the longitudinal stripes on the body in the female.

Figures

Figures 1–26. Clitumninae spp. 1–4. Interphasma lineatum sp. nov. 5–8. Medauroidea cattienensis sp. nov. 9–12. Medauroidea cornuta sp. nov. 13–16. Medauroidea fasciata sp. nov. 17–20. Neomedaura yokdonensis gen. & sp. nov. 21–22. Parapachymorpha pseudospinosa sp. nov. 23–26. Prosentoria vietnamensis sp. nov. 1, 7, 11, 15, 19, 25. Male end of abdomen, lateral view. 2, 8, 12, 16, 20, 26. Male end of abdomen, dorsal view. 3, 5, 9, 13, 17, 21, 23. Female end of abdomen, lateral view. 4, 6, 10, 14, 18, 22, 24. Female end of abdomen, dorsal view. Scale bars=5mm.

Figures 51–60. Medauroidea fasciata sp. nov. 51. Female habitus. 52. Female abdomen, lateral view. 53. Female abdomen, dorsal view. 54. Egg, lateral view. 55. Egg, dorsal view. 56. Male habitus. 57. Male abdomen, lateral view. 58. Male abdomen, dorsal view. 59. Female head and thorax, dorsolateral view. 60. Male head and thorax, dorsolateral view. Scale bars: 51–53, 56–60=5 mm; 54– 55=1mm.