Pylaemenes konkakinhensis, Ho, 2018

Ho, Wai-Chun George, 2018, Three new species of genus Pylaemenes Stål (Phasmatodea: Heteropterygidae: Dataminae) from Vietnam, Zoological Systematics 43 (3), pp. 276-282 : 279-281

Pylaemenes konkakinhensis sp. nov. ( Figs 11–13 , 20–21 )

Diagnosis. Pylaemenes konkakinhensis sp. nov. is similar to P. konchurangensis sp. nov., but can be separated by more robust body, two tubercles on outer edge of first antennal segment, lacking posterolateral granules on fourth abdominal tergum, apically pointed abdominal subgenital plate and comparatively less distinct armature on legs in female.

Female ( Figs 11–13 , 20–21 ). Small Dataminae . General colouration of body and legs brown with light brown markings. Body cylindrical and slender. Head oval. Vertex with 2 pairs of granules between compound eyes, anterior pair larger than posterior pair. Occiput elevated with a short crest, V-shaped dorsally, surface rough and rugose, with inconspicuous granulations. Posterior margin of head with 6 small swellings. Compound eyes small and rounded. Antennae sparsely covered with short bristles, with 25 segments; scapus triangular in cross section, with distinct median longitudinal carina, elevated with 2 short tubercles on outer edge ( Fig. 13 ), anterior one placed near apex and posterior one placed at middle area; pedicellus oval in cross section, shorter than scapus, as long as third segment. Thorax rough, with very sparse and small granulations, also interspersed with a few enlarged granules. Pronotum square, lacking row of granules along each side of longitudinal sulcus, anterior margin curved inwards. Mesonotum almost parallel-sided, slightly expanded posteriorly after post-medial area, longer than combined length of metanotum and median segment; median longitudinal line indistinct, anterior and posterior margins weakly elevated. Metanotum rectangular, longer than wide, longer than median segment, median longitudinal line indistinct. Abdomen rough, with short wrinkles, with very sparse and small granulations, also interspersed with a few enlarged granules. Fourth tergum lacking posterolateral granule. Fourth to seventh tergites with an X-shaped carina medially, indistinct on fourth tergum. Second to fourth tergites broadened posteriorly, fifth and sixth tergites narrowing posteriorly. Seventh tergum with a swollen hump-like praeopercular organ posteromedially. Ninth tergum with an elongate crest-like structure posteromedially, apex distinctly emarginated. Anal segment as long as eighth tergum, longer than ninth tergum, with small granules, lateral margins with a tubercle medially, posterior margin with 2 obscure median elevations forming 3 small emarginations, posterolateral angles gently elevated. Subgenital plate scoop-shaped, with enlarged granules, median longitudinal carina distinct, posterior margin pointed and distinctly surpassing posterior margin of anal segment. Cerci small, flattened and apices rounded. Legs sparsely covered with short bristles. All femora thicker than corresponding tibiae, with a short mediodorsal tubercle apically. Profemora curved basally, anterodorsal and posterodorsal carinae waved. Anterodorsal and posterodorsal carinae of mesofemora, metafemora, mesotibiae and metatibiae with 2 small blunt teeth. Anteroventral and posteroventral carinae of mesofemora and metafemora with 2 small blunt teeth near apices.

Measurements (♀). Body length 47.0 mm; antennae 14.0 mm; head 3.5 mm; pronotum 3.0 mm; mesonotum 10.0 mm; metanotum 4.0 mm; median segment 2.0 mm; profemora 7.0 mm; mesofemora 6.0 mm; metafemora 7.0 mm; protibiae 6.5 mm; mesotibiae 5.0 mm; metatibiae 6.5 mm.

Material examined. Holotype ♀, Vietnam, Gia Lai, Mang Yang District, 42km NE of Pleiku, W-part of Kon Ka Kinh National Park (14°12'12''N, 108°18'54''E; elev. 900 m), 10–21 May 2016, Abramov, A. V., F3476.99 ( MMUE).

Distribution. Vietnam.

Remarks. Male and egg are unknown. Further material collected from the type-locality is necessary to confirm its relationship with Pylaemenes konchurangensis sp. nov.

Etymology. The specific epithet of this new species is derived from the type locality, Kon Ka Kinh National Park in Gia Lai of central Vietnam.

Figures

Figures 1–13. Pylaemenes spp. 1–4. P. abramovi sp. nov. 5–10. P. konchurangensis sp. nov. 11–13. P. konkakinhensis sp. nov. 1. Male left mesofemur, lateral view. 2, 8. Male end of abdomen, lateral view. 3, 9. Male end of abdomen, dorsal view. 4, 10. Male vomer, ventral view. 5, 11. Female end of abdomen, lateral view. 6, 12. Female end of abdomen, dorsal view. 7, 13. Female left antenna, dorsal view. Scale bars: 1–3, 5–6, 8–9, 11–12=5mm; 4, 7, 10, 13=1mm.

Figures 14–21. Pylaemenes spp. 14–15. P. abramovi sp. nov. 16–19. P. konchurangensis sp. nov. 20–21. P. konkakinhensis sp. nov. 14, 18. Male habitus, lateral view. 15, 19. Male habitus, dorsal view. 16, 20. Female habitus, lateral view. 17, 21. Female habitus, dorsal view. Scale bars=5mm.