Conostigmus acutus 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 acutus Wang & Chen sp. nov.

Material examined.

Holotype: ( AHNU) • male China: Shanxi, Lishan National Nature Reserve, Dahe Protection Station , Malaise traps, 22–26. VIII. 2012, Yajun You, SCAU 3045598 . Paratype: ( SCBG) • 1 male: same collection information as preceding, SCAU 3045597 .

Diagnosis.

Head and mesosoma coarsely sculptured, metasoma smooth; randomly sized impressions around setal pits present and larger than scutes; median process on intertorular carina present and acute; mesoscutellum length almost equal to width; sternaulus present and complete; anteromedian projection of the metanoto-propodeo-metapecto-mesopectal complex absent; gastral carinae present and reaching 1 / 4 of syntergum length; male S 9 distal setae composing setiferous patches; distal margin of harpe in lateral view acute or straight; Gonossiculus spine count: 2.

Description.

Male. Body length: 1.5–1.6 mm.

Coloration. Colour hue pattern: head and mesosoma black (pronotum and propleuron reddish brown); metasoma brownish black (petiolus reddish brown); mandibles reddish brown and palps yellow; legs yellow; scape yellow; pedicel and F 1 – F 9 brown; pterostigma, costal vein, radial vein and marginal fringes of wings brown; body pubescence yellowish; male genitalia yellowish. Color intensity pattern: scape darker than legs.

Head (Fig. 4 D, E ). Head width, dorsal view: slightly wider than mesosoma (about 1.05 × wider than mesosoma). Head width vs. head height: HW: HH = 1.1–1.2. Head height vs. eye height: HH: EHf = 1.7–1.8. Head height vs. head length: HH: HL = 1.2–1.4. Head width vs. interorbital space: HW: IOS = 1.6–1.7. Lateral ocellar length: ocular ocellar length: LOL: OOL = 0.4–0.5. Lateral ocellar length: posterior ocellar length: LOL: POL = 0.6–0.7. Ocular ocellar length: posterior ocellar length: OOL: POL = 1.3–1.7. Head coarse; randomly sized impressions around setal pits count: present; the size of impressions around the setal pits on the head: impressions larger than scutes; head shape (anterior view): circular or triangular. Preoccipital lunula count: absent. Preoccipital carina count: absent. Preoccipital furrow count: present. Preoccipital furrow anterior end: preoccipital furrow ends inside ocellar triangle, but ends posterior to the anterior ocellus. Occipital carina count: present. Occipital carina structure: complete and crenulate. Postocellar carina count: present. 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. Facial sulcus absent. Facial pit present. Ocellar foveae distinct, and ocellar foveae width equal to ocellus diameter.

Antennae (Fig. 4 A ). Scape length vs. pedicel length: 3.8–4.5. Scape length vs. F 1 length: 1.2–1.3. F 1 length vs. pedicel length: 3.1–3.5. Longest male flagellomere: F 1. F 1 length vs. F 2 length: 1.0–1.2. F 3 length almost equal to F 4. F 7 length almost equal to F 8. Length of pubescence on flagellomere vs. flagellomere width: flagellomeres width about twice than pubescence length.

Mesosoma (Fig. 4 C, D ). Mesosoma roughness and slightly narrow (1.3 × longer than wide) (Length / width / height = 512 / 393 / 359 μm). AscW / PscW = 0.8–0.9. Mesoscutum 1.8 × wider than long (Length / width = 222 / 393 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 width, limited by a u-shaped carina. Sternaulus count: present. Sternaulus shape: elongate and complete. 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. 4 F ). Forewing length: 1.1–1.4 mm, translucent. Forewing macropterous with apex extending past petiole. Forewing with translucent stripes and dense pubescence. Pterostigma semi-circular, length vs. width: 2.1–3.2. Radius (200 μm), a little curved in the middle, longer (1.4 ×) than pterostigma. Hind wing without vein.

Metasoma (Fig. 4 G ). Metasoma 1.6 × longer than wide (Length / width / height = 647 / 408 / 357 μm). Transverse carina on petiole shape: concave. Syntergum smooth, longer (1.1 ×) than wide. Gastral carinae present and reaching 1 / 4 of syntergum length. Syntergal translucent patch count: present. Syntergal translucent patch shape: long rod-shaped. Rest of tergites smooth, but with sparse hairs.

Male genitalia (Fig. 5 ). 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: acute triangle. Distal margin of harpe shape: shrinking to an much acute angle. Distal margin of harpe in lateral view: acute or straight. Harpe orientation: dorsomedial. 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: absent. Parossiculus count or parossiculus and gonostipes fusion: present and parossiculi not fused with the gonostipes. Gonossiculus and gonossiculus spine present. Gonossiculus spine count: 2. Gonossiculus spine length: one spine more than 2 × as long as the other (s). Penisvalva curved proximally.

Distribution.

China (Shanxi).

Biology.

Unknown.

Etymology.

Consistent with the genus name, the species name is a Latin masculine adjective meaning “ mucronate ”, indicating a male mucronate harpe.

Figures

Figure 4. Conostigmus acutus 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 5. Conostigmus acutus Wang & Chen, sp. nov., male, holotype, genitalia A ventral view B dorsal view C lateral view D S 9.