Macrophya rugosifossa Li, Liu & Wei

Mengmeng Liu, Zejian Li, Jian Shang & Meicai Wei, 2016, Three new species of annulitibia - group of the genus Macrophya Dahlbom (Hymenoptera: Tenthredinidae) in Mts. Qinling from China, Zoological Systematics 41 (2), pp. 216-226 : 223-225

Macrophya rugosifossa Li, Liu & Wei , sp. nov.

( Figs 22–32 )

Female. Body length 10.5–11.0 mm. Body and legs black; palpi largely sordid brown; basal half of mandibles and a small triangular macula on anterior margin of labrum pale brown; following parts yellowish white: two small sub-round maculae in base of clypeus, lateral sides and posterior margin of pronotum, anterior part of tegula, center of posterior margin of abdominal tergum 1, posterior margins of terga 8 and 10, apical margins and outer sides of fore and middle coxae, apical margins and basal stripes on outer side of hind coxa; hind femur, tibia and tarsi entirely blackish brown. Body hairs silver; setae on sheath short and erect, blackish brown. Wings hyaline, with smoky macula below stigma, bound not clear; stigma and veins largely blackish brown ( Fig. 22 ).

Dorsum of head feebly shiny, frons rugosely and densely punctured, interspaces between punctures narrower than diameter of puncture, with fine microsculpture ( Fig. 24 ); labrum and clypeus less shiny, labrum with sparse and shallow punctures, clypeus with some large punctures and clear microsculpture ( Fig. 25 ). Thorax feebly shiny, lateral corners of pronotum with fine microsculpture; mesonotum with punctures smaller and denser than punctures on head, interspaces with fine microsculpture; mesoscutellum not shiny, with some large punctures; mesoscutellar appendage and metascutellum less shiny, with some shallow punctures and fine microsculpture. Mesepisternum less shiny, densely and minutely punctured, interspaces with fine microsculpture; anepimeron rugosely punctured and wrinkled; anterior margin 2/5 of katepimeron strongly shiny, without puncture or microsculpture, posterior parts 3/5 of katepimeron with some shallow punctures and weak microsculpture; metepisternum with fine punctures and microsculpture; metepimeron shiny, depressed parts smooth, without puncture and microsculpture, upper corner of dorsal margin with coarse punctures; posterior margin of metepimeron extended downward and largely concave, with a basin, containing some large punctures and rugose microsculpture ( Fig. 27 ). All abdominal terga feebly shiny, lateral sides of tergum 1 with some fine punctures, center nearly smooth; basal 2/5 of abdominal terga 2–7 with dense punctures, apical 3/5 with some punctures and fine microsculpture; terga 8–10 with dense punctures and clear microsculpture. Hind coxa and outer side of hind femur with minute and dense punctures, smooth interspaces narrow, feebly shiny. Surface of sheath coriaceous, lower half of sheath with minute punctures and fine microsculpture.

Middle of labrum weakly elevated, anterior margin truncate; clypeus weakly elevated, about 2 times broader than long, base distinctly broader than distance between lower corner of eyes; lateral sides distinctly convergent forwards, anterior margin arc and incised to approximately 1/5 length of clypeus, lateral lobes obtuse, subangular-like ( Fig. 25 ); malar space 0.4 times as long as diameter of middle ocellus; middle of frons flat, about as high as top of eyes in lateral view; middle fovea shallow but distinct; lateral foveae small, short furrow-like; interocellar furrow distinct, postocellar furrow indistinct; POL: OOL: OCL = 4: 14: 10; postocellar area weakly elevated, posterior margins oblique, 1.5 times broader than long, lateral furrows slight deep and clearly divergent backwards; head strongly narrowed behind eyes in dorsal view, occipital carina complete. Antenna slender, 1.2 times longer than head and thorax together (6: 5), as long as abdomen; antennomere 2 about 1.5 times as long as broad, antennomere 3, 1.6 times as long as antennomere 4 (30: 19), 0.8 times as long as antennomeres 4 and 5 combined (5: 6), subapical antennomeres weakly compressed and inflated, subapical antennomeres 6 to 9 slightly reduced ( Fig. 26 ). Mesoscutellum roundly elevated, with peak and lateral carina in posterior margins, without distinct middle carina, distinctly higher than top of mesoscutum; mesoscutellar appendage and metascutellum with distinct middle carinae; mesopleuron and metapleuron as shown in Fig. 27 ; dorsal-posterior platform of mesepimeron as broad as diameter of middle ocellus; distance between cenchri 3.5 times breadth of cenchrus. Inner tibial spur of hind leg 0.6 times length of hind tarsomere 1 (18: 31); hind tarsomere 1 slender, about 1.2 times longer than following 4 tarsomeres together (31: 25); claw with inner tooth shorter than outer tooth. Ovipositor sheath slightly shorter than hind tarsomere 1 (23: 31), apical sheath slightly longer than basal sheath (13: 10), apical margin roundish narrowed in lateral view ( Fig. 28 ). Fore wing with crossvein 1cu-a joining cell 1M at basal 1/8, crossvein 2r-rs joining cell 2Rs at apical 1/2, cell 2Rs slightly shorter than cell 1Rs; petiole of anal cell in fore wing broad puncture-like; anal cell of hind wing without petiole. Lancet with 23 serrulae ( Fig. 29 ), middle serrulae protruding and each with 2 proximal and 22–29 distal teeth, subbasal teeth very minute, annular spine bands narrow, with sparse pilosity; 8th–10th serrulae at base as in Fig. 30 .

Male Body length 10.5 mm ( Fig. 23 ), body color and structure similar to female, but labrum largely white, anterior view of head in male as shown in fig. 31; antennae largely dark brown, apical margins with hair ring more or less in male as shown in Fig. 32 ; anterior parts largely of hind femur, anterior parts of hind tibia, base on anterior parts of middle femur white; fore wing without smoky macula below stigma; subgenital palte longer than broad, center slightly elevated, apical margin roundish; genitalia unknown.

Holotype ♀, China, Gansu, Mt. Xiaolong, Dangchuan Forest Farm, Yulingou (106°07.254′E, 34°22.179′N; elev. 1 580–1 680 m), 4 August 2009, leg. Mingjun Tang; Paratypes. 3♀ 1♂, China, Shaanxi, Zhouzhi County, Houzhenzi (33°50.507′N, 107°49.694′E; elev. 1 309 m), 9 July 2006, leg. Xun Zhu. All deposited in CSCS.

Distribution. China (Gansu, Shaanxi).

Etymology. The new specific name “ rugosifossa ” is derivid from two Latin words, the “ rug -” (rugose) and “ fossa ” (basin), referring to the metepimeral appendage with a large basin, containing some large punctures and rugose microsculpture clearly.

Remarks. The new species is similar to M. pompilina Malaise, 1945 from Burma and China (Yunnan, Sichuan), but differs from the latter by following: fore wing with feeble, transverse smoky band below stigma, bound not clear; clepeus not entirely black, base in lateral corners with small round white maculae; posterior margin of pronotum with clear white band; mesoscutellum distinctly elevated, higher than the top of mesonotum; metepimeral appendage large, with a basin, containing some large punctures and rugose microsculpture; all trochanters entirely black, without white macula; hind tarsi entirely blackish brown; middle serrulae of lancet in female usually each with 2 proximal and 22–29 distal teeth, subbasal teeth very minute. In M. pompilina , the following characters are in contrast: fore wing with distinct, transverse smoky band below stigma, bound clear; clepeus is entirely black; posterior margin of pronotum with narrow white band; mesoscutellum elevated slightly, as high as the top of mesonotum; metepimeral appendage is small than the former, without distinct basin, containing fine punctures and microsculpture; fore and middle trochanters is largely white, ventral sides with black maculae, hind trochanter is entirely white; hind femur is not entirely black, dorsal side 4/5 with distinct white band; hind tarsi is not entirely black, some parts with white maculae more or less; middle serrulae of lancet in female usually each with 2 proximal and 12–13 distal teeth, subbasal teeth is small.

Funding This research was supported by the High Level Talents Projects of Lishui City (2015RC06) and the Science and Technology Program funded projects of Lishui City (2014NZH03).

Figures

Figures 22 – 32. Macrophya rugosifossa Li, Liu & Wei, sp. nov. 22. Female, dorsal view. 23. Male, dorsal view. 24. Female head, dorsal view. 25. Female head, anterior view. 26. Female antenna. 27. Female mesopleuron and metapleuron. 28. Ovipositor sheath, lateral view. 29. Lancet. 30. 8 th – 10 th serrulae of lancet. 31. Male head, anterior view. 32. Male antenna. Scale bars: 22 – 23 = 2 mm; 29 = 200 μm; 30 = 50 μm.