Macrophya zejiani Liu & Wei

Liu, Mengmeng, Li, Zejian & Wei, Meicai, 2019, Three new species of Macrophya Dahlbom (Hymenoptera, Tenthredinidae) with a key to species of the Macrophya imitator group in China, Zoosystematics and Evolution 95 (2), pp. 417-427 : 424-427

Macrophya zejiani Liu & Wei sp. nov. Figure 3

Diagnosis.

The new species is morphologically similar to M. weni Wei, 1998 in body and legs mainly black; antennae rather robust, middle antennomeres not inflated; ovipositor sheath much longer than middle tibia; but differs from the latter in having postocellar area twice as broad as long; pronotum entirely black; distance between cenchri twice breadth of a cenchrus; middle serrulae with 2 or 3 proximal and 9 or 10 distal teeth; fore wing below pterostigma with slightly smoky and ill-defined maculae. The new species is also morphologically similar to M. omeialpina Li, Jiang & Wei, 2018 in body and legs mainly black; antennae rather robust, middle antennomeres not inflated; pronotum entirely black; dorsal surface of hind tibia with a subapical white macula smaller than M. weni ; but differs from the latter in having postocellar area 2.5 × broader than long; POL: OOL: OCL = 4.5: 10: 5.5; antennomere 3 approximately 1.4 × as long as antennomere 4 (13: 9); distance between cenchri twice breadth of a cenchrus; middle serrulae with 2 or 3 proximal and 9 or 10 distal teeth; cell 2Rs as long as cell 1R1, petiole of anal cell in hind wing 0.6 × as long as cross-vein cu-a.

Description.

Holotype: female. Body length 7.5 mm. Body and legs black; a small triangular macula in anterior margin of clypeus pale brown; following parts white: basal half of mandibles, narrow band on posterior margin of abdominal tergum 1 submedially, apical margins of fore and middle coxae, apical half in anterior surface of fore femur, base mostly in anterior surface of fore tibia, hind trochanter entirely, hind tibia with small dorsal macula subapically. Body hairs short and dense, silvery; setae on ovipositor sheath slightly curved, blackish brown. Wings hyaline, below pterostigma with pale smoky macula, boundary ill-defined, pterostigma and veins mostly blackish brown ( Figure 3A ).

Vertex less shiny; frontal area coarsely and densely punctured, interspaces smooth but weak; postocellar area mostly with sparse large punctures, interspaces narrow ( Figure 3B ); labrum and clypeus less shiny, punctures on labrum and clypeus sparse shallow and microsculpture fine ( Figure 3C ). Mesonotum less shiny, punctures smaller than those on head, interspaces smooth but indistinct and without microsculpture; center of mesoscutellum with sparse large punctures and fine microsculpture; basal half of mesoscutellar appendage rugose, apical half smooth, without distinct puncture; metascutellum somewhat shiny, punctures indistinct and microsculpture weak. Mesopleuron less shiny, mesepisternum with dense and coarse punctures, interspaces smooth but indistinct; anepimeron dull, with coarse wrinkles; anterior margin of katepimeron very smooth and shiny, without punctures or microsculpture, otherwise with sparse large shallow punctures, dorsal half with sparse coarse punctures; metepisternum dull, with minute punctures; metepimeron less shiny, most parts with sparse punctures and weak microsculpture; metepimeronal appendage platform-shaped, with some minute punctures ( Figure 3E ). All abdominal terga somewhat shiny, abdominal tergum 1 with sparse shallow punctures, with fine but distinct microsculpture submedially; other abdominal terga with minute and shallow punctures, microsculpture weak. Outer surface of hind coxa with somewhat dense and coarse punctures, ventral surface of hind coxa and outer surface of hind femur with sparse shallow punctures and fine microsculpture. Surface of ovipositor sheath coriaceous, with indistinct punctures and fine microsculpture.

Labrum elevated medially, anterior margin slightly truncate; clypeus weakly elevated, base slightly broader than distance between lower inner orbits of eyes, lateral sides distinctly convergent apically, anterior margin deeply incised to approximately 1/5 its length, lateral corners short and broad, lobe margin roundly subtriangular ( Figure 3C ); malar space linear, approximately 0.5 × as broad as diameter of middle ocellus; frontal area and face flat, slightly higher than top of eyes in lateral view; middle fovea weak, lateral foveae shallow, short furrow-like; interocellar furrow shallow, postocellar furrow weak; POL: OOL: OCL = 9: 20: 11; postocellar area weakly elevated, 2.5 × broader than long; lateral furrow somewhat narrow, divergent posteriorly; head narrowed behind eyes in dorsal view, occipital carina complete. Antenna rather robust, approximately 1.2 × longer than head and thorax together (17:14), approximately 1.1 × longer than abdomen (17: 15); antennomere 2 approximately 1.2 × as long as breadth; antennomere 3 approximately 1.4 × as long as antennomere 4 (39: 27), approximately 0.8 × as long as antennomeres 4 and 5 together (39: 51), middle antennomeres not inflated, subapical antennomeres weakly compressed ( Figure 3D ). Mesoscutellum roundly elevated, with weak middle ridge or carina, as high as top of mesonotum in lateral view; mesoscutellar appendage with lower middle longitudinal carina; metascutellum with short and lower carina; posterodorsal platform of mesepimeron as broad as diameter of middle ocellus; metepimeronal appendage small platform-shaped; distance be tween cenchri twice breadth of a cenchrus; mesopleuron and metapleuron as shown in Figure 3E . Inner tibial spur of hind leg 0.6 × length of metabasitarsus (5: 8); metabasitarsus slender, about 1.1 × longer than following four tarsomeres together (8: 7); claw with inner tooth slightly shorter than outer tooth. Ovipositor sheath clearly longer than metabasitarsus (5: 4), apical sheath as long as basal sheath, setae on ovipositor sheath slightly curved in dorsal view, apical margin round in lateral view ( Figure 3F ). Fore wing with cross-vein cu-a joining cell 1M in basal 1/4, cross-vein 2r joining cell 2Rs in apical 1/4, cell 2Rs as long as cell 1R1, petiole of anal cell slightly shorter than cross-vein 1r-m and petiole of anal cell in hind wing 0.6 × longer than cross-vein cu-a. Lancet narrow and long, with 21 serrulae ( Figure 3G ), serrulae clearly protruding and oblique platform-shaped, middle serrulae with 2 or 3 proximal and 9 or 10 distal teeth, subbasal teeth distinct and small, annular spine bands narrow, the 8 th– 10th serrulae as shown in Figure 3H .

Male.

Unknown.

Type material.

Holotype, ♀, China: Yunnan Province: Deqin County, Mountt Meri, 28°425'N, 98°805'E, 2700 m, 20.vi.2009, leg. Yihai Zhong, ethylacetate.

Host plants.

Unknown.

Distribution.

China (Yunnan).

Etymology.

The specific name " zejiani " is derived from the name of Dr. Zejian Li who has made great contributions to the study of Macrophya systematics.

Figures

Figure 3. Macrophya zejiani sp. nov., ♀, holotype. A. Female adult, dorsal view; B. Head of female, dorsal view; C. Head of female, frontal view; D. Antenna of female, lateral view; E. Mesopleuron and metapleuron of female; F. Ovipositor sheath, lateral view; G. Lancet; H. The 8 th- 10 th serrulae. Scale bars: 2 mm (A); 100 µm (G); 50 µm (H).