Pachyprotasis nigricoxis, Zhong, Yihai & Wei, Meicai, 2010

Zhong, Yihai & Wei, Meicai, 2010, The Pachyprotasis formosana group (Hymenoptera, Tenthredinidae) in China: identification and new species, Zootaxa 2523, pp. 27-49 : 45-47

Pachyprotasis nigricoxis , new species

( Fig. 10 )

Material examined. Holotype: female, Deqin, Yunnan Province (98°93΄E, 28°05΄N, alt. 3200m), 15. 0 7. 2004, Xiao Wei leg.

Distribution. China (Yunnan).

Etymology. The specific epithet, an adjective, refers to the black metacoxa.

Diagnosis. Body length 8 mm. Black, yellow-white are: distinct spots on dorsal parts of thorax, medial triangular spots on tergites 3–7, central parts of tergites 8 and 9, anterolateral parts of tergites 1–7, posterior margins of all sternites; antennae black, white are: flagellomeres 4 and 5, basal half of flagellomere 6; flagellomere 1 slightly shorter than flagellomere 2; legs red-brown, yellow-white are: all trochanters, anterior of pro- and mesolegs from apex of tibiae to claws, apex of hind tarsomere 1, tarsomeres 2–4 totally, basal 2/3 of tarsomere 5; black are: all coxae, posterior stripes from base of pro- and mesotarsomeres 1 to claw, faint black spots on base and apex of pro- and mesofemora, broad band on inner side of metafemur, apex of metatibia, basal 8/11 of hind tarsomere 1 and apex of tarsomere 5. Punctures on frontal area and inner orbits large, deep, distance between punctures larger than diameter of a puncture, distinctly shining; punctures on upper corner of mesepisternum larger and coarser than on head, on lower part smaller and denser than on head, interspaces with microsculpture.

Description. Female: Body length 8 mm. Black, yellow-white are: lateral part and a v-shaped spot on anterior part of labrum, posterolateral part of clypeus, face below antennal socket, inner orbits contiguously with a spot on temple, lower hind orbits, flagellomeres 4 and 5, basal half of flagellomere 6, basal 2/3 of tegulae, anterolateral margin of mesonotal middle lobe, a small central spot on mesonotal lateral lobe, central part of mesoscutellum, apex of appendage, metascutellum, posterodorsal corner of metepisternum, apex and lateral margin of metepimeron, medial triangular spots on tergites 3–7, central parts of tergites 8 and 9, anterolateral parts of tergites 1–7, posterior margins of all sternites; base of labrum and middle part of clypeus each with a large black-brown spot; legs red-brown, yellow-white are: all trochanters, anterior of pro- and mesolegs from apex of tibiae to claws, apex of hind tarsomere 1, tarsomeres 2–4 totally, basal 2/3 of tarsomere 5; black are: all coxae, broad band on inner side of metafemur, apex of metatibia, basal 8/11 of hind tarsomere 1 and apex of tarsomere 5; pro- and mesolegs with black posterior stripes from base of tarsomere 1 to claw, base and apex of pro- and mesofemur with faint black spots. Wings hyaline; costa, subcosta, and R1 dark brown, stigma fuscous, remaining veins black-brown ( Figs 10 a, 10b).

Labrum small, with sub-quadrate anterior margin; clypeus truncately incised to 1/3 of its medial length, lateral lobes rather blunt; malar space wider than diameter of median ocellus; inner margins of eyes slightly convergent downwards; supraantennal tubercles insignificant, frontal area slightly elevated below level of eyes in lateral view, frontal ridges rounded; anterior half of median fovea deep, posterior half shallow, reaches median ocellus; antennal furrow trench-like; interocellar and postocellar furrows rather shallow; postocellar area elevated and with shallow medial furrow, relative width: length = 1.25, lateral postocellar furrows shallow and divergent backwards; head insignificantly narrowed behind eyes. Antenna longer than combined length of thorax and abdomen, flagellomere 1 slightly shorter than flagellomere 2 = 0.96; mesoscutellum bluntly elevated, anterior part of lateral carina distinct, apex rounded, middle carina of appendage blunt. Hind tarsomere 1 slightly shorter than combined length of following 4 tarsomeres, claw with inner tooth equal to outer tooth. Front wing with middle petiole of anal cell shorter than 1/2 of basal anal cell, much longer than vein R+M = 1.57; petiole of anal cell on hind wing present, shorter than half of vein cu-a.

Punctures on labrum and clypeus shallow and scattered; frontal area and inner orbits with large and deep punctures, distance between punctures larger than diameter of a puncture, distinctly shining; mesonotum minutely punctured, distance between punctures 1.5–2 times diameter of punctures, distinctly shining; punctures on upper corner of mesepisternum larger and coarser than on head, on lower part smaller and denser than on head, interspaces with microsculpture; mesepimeron with distinct sculpture, punctures scattered and shallow, shining; punctures on metepisternum extremely minute and dense, on metepimeron indistinct, both with microsculpture and oily luster; central part of mesoscutellum polished without punctures, microsculpture indistinct, punctures on lateral part rather large and deep, appendage polished without punctures, microsculpture indistinct, both mesoscutellum and appendage with distinct oily luster; punctures on central part of tergites indistinct, on lateral side scattered and minute, surface between punctures with microsculpture and oily luster; punctures on outer side of hind coxa large, deep and dense.

Relative length of ovipositor sheath in lateral view distinctly shorter than hind tarsomere 1 = 0.7, valvula 3 slender and rather acute at apex, longer than valvifer 2 = 1.6. Lancet with 23 annuli, middle serrula having 1–2 anterior and 8–9 posterior subbasal teeth, the 9th to 10th serrulae as in Fig. 10 c.

Male. unknown.

Figures

FIGURES 10. Pachyprotasis nigricoxis sp. nov. holotype, (a). Female, dorsal view; (b). Female, lateral view; (c). Serrulae 9 – 10 of ovipositor.