Conostigmus quadripetalus Wang & Chen, 2024

Wang, Xu, Cui, Shanshan, Li, Fang, Huang, Yixin & Chen, Huayan, 2024, Three new species of Conostigmus from China and redescription of Conostigmus ampullaceus Dessart, 1997 (Hymenoptera, Megaspilidae), Journal of Hymenoptera Research 97, pp. 807-824 : 807-824

Conostigmus quadripetalus Wang & Chen sp. nov.

Material examined.

Holotype: ( AHNU) • male China: Guizhou, Dabanshui National Forest Park , 939 m, 7–10. VI. 2011, Dongdong Feng, SCAU 3045592 . Paratypes: ( AHNU) • male Guizhou, Dabanshui National Forest Park , 939 m, 7–10. VI. 2011, Dongdong Feng, SCAU 3045591 . ( SCBG) • 2 males: same collection information as preceding, SCAU 3045590 , SCAU 3045589 .

Diagnosis.

This species is distinguished by the following combination of characters: preoccipital lunula present; preoccipital carina present; preoccipital furrow present and preoccipital furrow ends posterior to ocellar triangle; antennal scrobe present; mesoscutellum length almost equal to wide, and not limited by a u-shaped carina; Sternaulus elongate and exceeding 2 / 3 of mesopleuron length at level of sternaulus; gastral carinae present and reaching 1 / 3 of syntergum length; distal margin of male S 9 shape: convex; proximolateral corner of male S 9 shape: blunt; distal margin of harpe blunt or straight; distal margin of harpe in lateral view acute or pointed; harpe shorter than gonostipes in lateral view; 4 gonossiculus spine and one spine more than 2 × as long as the other (s).

Description.

Male. Body length: 1.1 mm.

Coloration. Colour hue pattern: head and mesosoma black; metasoma dark brown; mandibles brown; palps yellow; scape yellow to brown, pedicel and flagellum brown; legs yellow; pterostigma, costal vein, radial vein and marginal fringes of wings light brown; body pubescence yellowish; male genitalia yellow. Color intensity pattern: petiole neck and anterior region of syntergite lighter than the posterior region of the syntergite; pedicel and F 1 lighter than F 2 – F 9.

Head (Fig. 8 D, E ). Head width, dorsal view: slightly wider than mesosoma (about 1.1 × wider than mesosoma). Head width vs. head height: HW: HH = 1.1–1.3. Head height vs. eye height: HH: EHf = 1.5–1.7. Head height vs. head length: HH: HL = 1.2–1.4. Head width vs. interorbital space: HW: IOS = 1.6–1.8. Lateral ocellar length: ocular ocellar length: LOL: OOL = 0.5–0.8. Lateral ocellar length: posterior ocellar length: LOL: POL = 0.4–0.8. Ocular ocellar length: posterior ocellar length: OOL: POL = 1.4–1.9. Head smooth; head shape (anterior view): circular or triangular. Preoccipital lunula count: present. Preoccipital carina count: present. Preoccipital furrow count: present. Preoccipital furrow anterior end: preoccipital furrow ends posterior to ocellar triangle. Occipital carina count: present. Occipital carina structure: complete and crenulate. Intertorular area count: present. Intertorular carina count: present. Median process on intertorular carina count: present. Median process on intertorular carina shape: acute. Median region of intertorular area shape: flat. Antennal scrobe count: present. Facial sulcus absent. Facial pit absent. Ocellar foveae distinct, and ocellar foveae width less than ocellus diameter.

Antennae (Fig. 8 A ). Scape length vs. pedicel length: 3.0–4.2. Scape length vs. F 1 length: 1.2–1.5. F 1 length vs. pedicel length: 2.3–2.7. Longest male flagellomere: F 1. F 1 length vs. F 2 length: 1.1–1.2. F 4 length almost equal to F 6. Length of pubescence on flagellomere vs. flagellomere width: flagellomeres width about twice than pubescence length.

Mesosoma (Fig. 8 C, D ). Mesosoma slightly narrow (1.4 × longer than wide) (Length / width / height = 403 / 263 / 293 μm). AscW / PscW = 0.7–0.9. Mesoscutum 1.85 × wider than long (Length / width = 158 / 293 μm). Transscutal articulation evident. Notaulus count: present and complete. Notaulus posterior end: adjacent to transscutal articulation, posterior end of notaulus contracted but not adjacent to median mesoscutal sulcus. Median mesoscutal sulcus count: present and complete. Median mesoscutal sulcus posterior end: adjacent to transscutal articulation. Scutoscutellar sulcus count: present. Scutoscutellar sulcus vs. transscutal articulation location: adjacent. Scutoscutellar sulcus shape: scutoscutellar sulcus angled medially, foveolate. Mesoscutellum length almost equal to wide, not limited by a u-shaped carina. Sternaulus count: present. Sternaulus shape: elongate and exceeding 2 / 3 of mesopleuron length at level of sternaulus. Mesopleural sulcus shape: straight. Pleural pit present. Lateral propodeal carina shape: inverted “ Y ”. Anteromedian projection of the metanoto-propodeo-metapecto-mesopectal complex absent.

Wings (Fig. 8 F ). Forewing length: 0.8–1.0 mm, translucent. Forewing macropterous with apex extending past petiole. Forewing with transparent stripes and dense pubescence (stripes without pubescence). Pterostigma semi-circular, length vs. width: 2.7–4.4. Radius (200 μm), a little curved, longer (1.4 ×) than pterostigma. Hind wing without vein.

Metasoma (Fig. 8 G ). Metasoma 1.6 × longer than wide (Length / width / height = 508 / 321 / 252 μm). Transverse carina on petiole shape: concave. Syntergum smooth, longer (1.1 ×) than wide. Gastral carinae present and reaching 1 / 3 of syntergum length. Syntergal translucent patch count: present. Syntergal translucent patch shape: elliptical. Rest of tergites smooth, but with sparse hairs.

Male genitalia (Fig. 9 ). Distal margin of male S 9 shape: convex. Proximolateral corner of male S 9 shape: blunt. Male S 9 distal setal line / setal patch count: distal setae composing setiferous patch or patches; distal setae composing transverse setiferous line or lines. Submedial projections on proximal margin of S 9 count: absent. Harpe shape: simple and not bilobed. Distal margin of harpe shape: blunt or straight (with a little raised). Distal margin of harpe in lateral view: acute or pointed. Harpe orientation: medial. Harpe length: harpe shorter than gonostipes in lateral view. Lateral setae of harpe count: present. Lateral setae of harpe orientation: oriented distally. Dense patch of setae on the distoventral edge of the harpe count: present. Parossiculus count or parossiculus and gonostipes fusion: present and parossiculi not fused with the gonostipes. Gonossiculus and gonossiculus spine present. Gonossiculus spine count: 4. Gonossiculus spine length: one spine more than 2 × as long as the other (s). Penisvalva curved and intersecting proximally.

Distribution.

China (Guangdong).

Biology.

Unknown.

Etymology.

Consistent with the genus name, the species name is a Latin masculine adjective meaning “ quadrifid ”, indicating 4 gonossiculus spines.

Figures

Figure 8. Conostigmus quadripetalus Wang & Chen, sp. nov., male, holotype A lateral habitus B dorsal habitus C head and mesosoma, lateral view D head and mesosoma, dorsal view E head, anterior view F wings G metasoma, dorsal view.

Figure 9. Conostigmus quadripetalus Wang & Chen, sp. nov., male, holotype, genitalia A dorsal view B ventral view C lateral view D S 9.