Medauroidea cattienensis, Ho, 2020

Ho, Wai-Chun George, 2020, New taxa of Clitumninae from Vietnam (Phasmatodea: Phasmatidae), Zoological Systematics 45 (2), pp. 104-117 : 107-109

Medauroidea cattienensis sp. nov. ( Figs 5–8 , 35–42 )

Diagnosis. This new species is related to Medauroidea fasciata sp. nov., but can be separated by the weakly emarginated posterior margin of the anal abdominal segment and the absence of laterally expanded lobe on the seventh tergum in the female and the unarmed mesofemora and metafemora in the male.

Description. Female. Body elongate and slender, distinctly larger and more robust than male. General colouration of body and legs brown. Head sparsely granulated. Oblong, longer than wide. Vertex obscurely convex, unarmed. Occiput flat, median and lateral longitudinal furrows indistinct, posterior margin weakly raised, with six small swellings. Compound eyes small and rounded, its length about four times of genae. Antennae short, with 22 segments, reaching middle area of profemora; scapus flattened, constricted anteriorly and posteriorly, longer than combined length of pedicellus and third segment; and pedicellus shorter than third segment. Thorax sparsely granulated. Pronotum trapezoidal, gently expanded posteriorly, shorter than head, anterior margin strongly incurved, posterior margin truncate, transverse and longitudinal sulci crossing at middle point. Mesonotum parallel-sided, longer than combined length of metanotum and median segment, lateral margins with a few acute granules. Metanotum longer than median segment. Abdomen cylindrical, lacking granulation. Median segment rectangular, longer than wide. Seventh sternum lacking noticeable praeopercular organ. Eighth tergum longer than ninth tergum. Ninth tergum with a small crest posteromedially. Anal segment longer than ninth tergum, posterior margin with a small, broad V-shaped emargination, posterolateral angles obtuse, median longitudinal carina weakly elevated. Supraanal plate distinct, small, median longitudinal carina distinct, posterior margin pointed and not exceeding posterolateral angles of anal segment. Subgenital plate scoop-shaped, posterior apex pointed and reaching middle area of anal segment. Cerci short, flattened, apices rounded and not surpassing posterior margin of anal segment. Legs slender and long. Femora thicker than corresponding tibiae. Profemora curved basally, posterodorsal carina with a few serrations, other carinae unarmed. Anterodorsal and posterodorsal carinae of mesofemora and metafemora with a few minute serrations, other carinae unarmed. Tibiae unarmed.

Male. Body slender and slim, distinctly smaller and slenderer than female. General colouration of body and legs brown to dark brown. Head sparsely granulated. Oblong, longer than head. Vertex flat, unarmed. Occiput flat, with indistinct median and lateral longitudinal furrows, posterior margin weakly raised, with four small swellings. Compound eyes small and rounded, its length about three times of genae. Antennae short, with 26 segments, apices reaching subapical area of profemora; scapus flattened, as long as combined length of pedicellus and third segment; third segment longer than pedicellus. Thorax covered with very few granules. Pronotum rectangular, longer than wide, anterior margin strongly incurved, posterior margin truncate, transverse and longitudinal sulci crossing at middle point. Mesonotum longer than combined length of metanotum and median segment, parallel-sided. Metanotum longer than median segment. Abdomen slender and cylindrical. Median segment rectangular, longer than wide. Ninth tergum shorter than eighth tergum. Anal segment as long as eighth tergum, dilated into two distinct semi-tergites, tapering posteriorly, inner margin with minute dentations, apices obtuse. Poculum small, cup-shaped, posterior margin pointed and reaching posterior area of ninth tergum. Cerci cylindrical, short, apices obtuse and not exceeding posterior apices of anal segment. Legs slender and long. Femora thicker than corresponding tibiae. Profemora curved basally, posterodorsal carina with a few small serrations, other carinae unarmed. Mesofemora and metafemora unarmed. Protibiae unarmed. Anterodorsal and posterodorsal carinae of mesotibiae and metatibiae with a few minute spines subapically, other carinae unarmed.

Measurements. Length. Body, ♀ 77.0 mm, ♂ 60.0–64.0 mm; antennae, ♀ 12.0 mm, ♂ 20.0–22.0 mm; head, ♀ 5.0 mm, ♂ 3.0 mm; pronotum, ♀ 3.0 mm, ♂ 2.0 mm; mesonotum, ♀ 17.0 mm, ♂ 13.0–14.0 mm; metanotum, ♀ 8.0 mm, ♂ 7.0 mm; median segment, ♀ 3.0 mm, ♂ 3.0 mm; profemora, ♀ 27.0 mm, ♂ 26.0–29.0 mm; mesofemora, ♀ 18.0mm, ♂ 16.0–17.0 mm; metafemora, ♀ 22.0 mm, ♂ 21.0–24.0 mm; protibiae, ♀ 32.0 mm, ♂ 31.0–34.0 mm; mesotibiae, ♀ 20.0 mm, ♂ 19.0– 20.0 mm; metatibiae, ♀ 27.0mm, ♂ 27.0–28.0 mm.

Material examined. Holotype ♀, Vietnam, Dong Nai, Tan Phu, Cat Tien National Park , Nui Tuong Station , 20 September 2011, Liu Xingyue ( CAU). Paratypes. 2♂, same data as holotype ( CAU & HKES) .

Distribution. Vietnam.

Etymology. The specific epithet of this new species is derived from the type locality, Cat Tien National Park, Dong Nai, Vietnam.

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 35–42. Medauroidea cattienensis sp. nov. 35. Female habitus. 36. Female abdomen, lateral view. 37. Female abdomen, dorsal view. 38. Male habitus. 39. Male abdomen, lateral view. 40. Male abdomen, dorsal view. 41. Female head and thorax, dorsolateral view. 42. Male head and thorax, dorsolateral view. Scale bars=5mm.