Macrophya longifossa, Li, Zejian, Liu, Mengmeng & Wei, Meicai, 2019

Li, Zejian, Liu, Mengmeng & Wei, Meicai, 2019, Three new species of the Macrophyamaculitibia group (Hymenoptera, Tenthredinidae) with a key to known species from China, Zoosystematics and Evolution 95 (1), pp. 37-48 : 39-40

Macrophya longifossa sp. n. Figures 13-20

Diagnosis.

This new species is similar to M. jiuzhaina Chen & Wei, 2005 in general morphological characteristics: body and legs mainly black; lancet narrow and long, serrulae somewhat oblique, almost linear, middle serrulae each with 2 proximal and 5-13 distal teeth, subbasal teeth somewhat small and clear in both, but can be distinguished from the latter by the following: malar space 0.5 × diameter of median ocellus; subapical antennomeres dilated, slightly broader than pedicel; apical part of fore wing without smoky macula; anterior 2/5 of katepimeron smooth and shiny; metepimeronal appendage broad and shallow, 4.5 × as long and 3 × as broad as diameter of median ocellus; fore wing hyaline, below stigma without smoky macula. M. jiuzhaina : malar space 0.7 × diameter of middle ocellus; subapical antennomeres not dilated, slightly slender than pedicel; apical 1/3 of fore wing with smoky macula, basal 2/3 hyaline; anterior margin of katepimeron narrow and smooth; metepimeronal appendage slightly smaller than the former, 4 × as long and 3 × as broad as diameter of median ocellus; basal 2/3 of fore wing hyaline, apical 1/3 below stigma with smoky macula.

Description.

Holotype: female. Body length 9.5 mm. Body and legs black, following parts white: basal half of mandibles, apex in anterior surface of fore femur, anterior surface of fore tibia, subbasal part on dorsal side of hind tibia. Body hairs pale brown, setae on sheath black brown. Wings hyaline, without smoky macula, stigma and veins black brown (Fig. 13).

Dorsum of head somewhat shiny; frons with somewhat dense and rugose punctures, without smooth interspaces between punctures (Fig. 14); labrum and clypeus somewhat polished, with sparse and shallow punctures, microsculpture fine. Mesonotum somewhat shiny, punctures on mesonotum smaller and finer than punctures on head, without smooth interspaces between punctures, with fine but distinct microsculpture; punctures on mesoscutellum somewhat large and rugose, microsculpture just visible; metascutellum with some indistinct punctures and microsculpture; mesepisternum densely punctured, interspaces with fine microsculpture, upper 1/3 with somewhat large punctures, lower 2/3 with minute punctures; anepimeron dull, punctures and wrinkles rugose; anterior 2/5 of katepimeron smooth and shiny, without punctures or microsculpture, posterior 3/5 of katepimeron coarsely punctured and rugose; lateral region of metepisternum dull, minutely and densely punctured, microsculpture fine; metepimeron somewhat shiny, depressed area of metepimeron weakly punctured, elevated part of metepimeron coarsely punctured; metepimeronal appendage with fine punctures and microsculpture; anterior with a distinct smooth and obtuse carina (Fig. 16). All abdominal terga shiny, center of abdominal tergum I with fine microsculpture, lateral sides with distinct punctures; other abdominal terga with fine microsculpture and very sparse but distinct punctures. Hind coxa and outer side of hind femur somewhat shiny, with slightly dense minute punctures, interspaces between punctures with fine microsculpture. Surface of sheath with fine punctures and faint microsculpture.

Anterior margin of labrum truncate; clypeus somewhat elevated in lateral view, broader than distance between the shortest distance between lower inner orbits; lateral sides convergent forwards, anterior margin shallowly incised to nearly 1/5 × length of clypeus, lateral corner subquadrate, apical margin short and obtuse (Fig. 15); malar space 0.5 × diameter of median ocellus; frons flat, as high as top of eyes in lateral view; middle fovea shallow and fine; lateral foveae slightly deep, furrow-like; interocellar furrow distinct, postocellar furrow indistinct; POL: OOL: OCL = 6: 15: 8; postocellar area slightly elevated, not higher than top of eyes, approximately 2.3 × broader than long (9: 4), lateral furrows deep and divergent backwards; head narrowed behind eyes in dorsal view, occipital carina complete. Antenna slender, as long as head and thorax together, 0.8 × length of abdomen; antennomere II 1.4 × as long as broad (24: 17), antennomere III 1.7 × as long as antennomere IV (19: 11), slightly shorter than antennomeres IV and V together (95: 103), subapical antennomeres dilated and slightly broader than pedicel, weakly compressed, the ratio of antennomeres IV–IX = 55: 48: 35: 32: 30: 33 (Fig. 17). Mesoscutellum elevated roundish, posterior with fine peak, lateral sides with fine carina, without middle carina, as high as top of mesonotum; mesoscutellar appendage with a high and acute middle carina, metascutellum with a low and short middle carina; dorsal-posterior platform of mesepimeron as broad as diameter of median ocellus; metepimeronal appendage broad and large, approximately 4.5 × as long and 3 × as broad as diameter of median ocellus; mesopleuron and metapleuron as in Figure 16; distance between cenchri twice as broad as a cenchrus. Inner spur of hind tibia 0.7 times length of metabasitarsus (43: 60); metabasitarsus slender, approximately 1.1 × length of following four tarsomeres together (12: 11); claw with inner tooth slightly shorter than outer tooth. Ovipositor sheath slightly shorter than metabasitarsus (14: 15), apical sheath longer than basal sheath (29: 25), apical margin slightly acute and somewhat rounded in lateral view (Fig. 18). Fore wing with vein cu-a joining cell 1M in basal 1/3, vein 2r joining cell 2Rs in apical 1/5, cell 2Rs slightly shorter than cell 1Rs, vein 2r-m slightly oblique, anal cell with a long spot-like vein; petiole of anal cell in hind wing as long as vein cu-a. Lancet with 21 serrulae (Fig. 19), serrulae oblique and weakly protruding, middle serrulae each with two proximal and 5-8 distal teeth, subbasal teeth slightly large and few, annular spine bands narrow, the 8th -10th middle serrulae as in Figure 20.

Male. Unknown.

Type material.

Holotype, ♀, China: Shaanxi Province: Chang’an Region, Jiwozi, 33°51.319'N, 108°49.193'E, 1765 m, 27.vi.2008, leg. Xun Zhu. Paratypes, Ningxia Province: 3♀, CSCS17109, Guyuan City, Jingyuan County, Erlonghe, 35°18'59"N, 106°21'3"E, 2176m, 30.vi.2017, leg. Meicai Wei & Hannan Wang, Ethylacetate; Ningxia Province: 1♀, CSCS17110, Guyuan City, Jingyuan County, Yehegu, Waigou, 35°29'53"N, 106°13'22"E, 2281 m, 01.vii.2017, leg. Meicai Wei & Hannan Wang, Ethylacetate; Ningxia Province: 1♀, CSCS17107, Guyuan City, Jingyuan County, Sutai Forest Farm, 35°27'23"N, 106°12'2"E, 2281m, 28.vii.2017, leg. Meicai Wei & Hannan Wang, Ethylacetate.

Host plants.

Unknown.

Distribution.

China (Ningxia, Shaanxi).

Etymology.

The specific name is derived from two Latin words “longus” and “fossa” referring to the long and large fossa of the metepimeronal appendage.