Conostigmus clayulatus Yang & Wang, 2025

Conostigmus clayulatus Yang & Wang sp. nov.

Diagnosis.

The new species can be distinguished from other Conostigmus species by the following characters: facial sulcus present and extends from the median ocellus to the intertorular carina; sternaulus present, elongate and reaching 3 / 4 of mesopleuron length; harpe with numerous long and slender apical setae and sparse lateral setae; and S 9 cup-shaped with a straight tip bearing six setal patches at the end.

Material examined.

Holotype. ♂, China • Chongqing Municipality, Wuxi County, Yintiaoling Nature Reserve, Cotton Hill , 31°30'38.35"N, 109°42'4.54"E, alt. 2188 m, 22 July 2024, F. Li, W. J. Zhao, Y. C. Li leg. ( CQWX-2402-0707-18 ) GoogleMaps . Paratypes. 1 ♂, China • Chongqing Municipality, Wuxi County, Yintiaoling Nature Reserve, Mt. Guanshan , 31°32'12.43"N, 109°41'58.38"E, alt. 2155 m, 21 July 2024, F. Li, W. J. Zhao, Y. C. Li leg. ( CQWX-2402-0702-13 ) GoogleMaps . 1 ♀, China • Chongqing Municipality, Wuxi County, Yintiaoling Nature Reserve, Cotton Hill , 31°30'38.35"N, 109°42'4.54"E, alt. 2188 m, 22 July 2024, F. Li, W. J. Zhao, Y. C. Li leg. ( CQWX-2402-0707-20 ) GoogleMaps .

Description.

Male: Body length 2.1–2.2 mm ( N = 2).

Coloration (Fig. 4 View Figure 4 ). Cranium, mesosoma and metasoma black. Mandibles brown and palps yellowish brown. Scape, pedicel and F 1 brown, F 2 to F 9 black. Legs and joint brownish yellow. Syntergum black (Fig. 4 G View Figure 4 ); metasoma gaster black. Pterostigma, costal vein, and radial vein brown (Fig. 4 F View Figure 4 ). Body pubescence pale yellowish brown; marginal fringes of wings light brown.

Head (Fig. 4 B, D, E View Figure 4 ). About the width of mesosoma. (about 0.96 × as wide as mesosoma). HH: EHf = 1.5–1.7. HH: HL = 0.7–1.1. HW: IOS = 1.4. HW: HH = 1.5–1.6. OOL longer than POL and ocellar triangle with narrow base. OOL: LOL = 2.6–2.9. POL: OOL = 0.6. Head oval with pubescence. Preoccipital lunula present. Preoccipital furrow present, ending inside ocellar triangle, but posterior to anterior ocellus. Median process on intertorular carina present, process not extending across intertorular area towards dorsal margin of clypeus. Facial sulcus present and extends from the median ocellus to the intertorular carina. Facial pit absent. Intertorular carina present.

Antennae (Fig. 4 C View Figure 4 ). Scape 0.7 × as long as the combined length of pedicel and F 1. Scape length vs. pedicel length: 3.5–3.6. Scape length vs. F 1 length: 1.0. F 1 length vs. pedicel length: 3.5–3.7. F 1 length vs. F 2 length: 1.2–1.3. Flagellum cylindrical. Setae on flagellomeres shorter than the width of flagellomeres.

Mesosoma (Fig. 4 B, D View Figure 4 ). Pronotum shorter than the mesoscutum along the midline. AscW / PscW = 1.0. Mesosoma 1.6 × as long as wide (Length / width / height = 863 / 547 / 530 μm), densely pubescent. Mesoscutum 2.1 × as wide as long (Width / length = 547 / 264 μm). Transscutal articulation present. Median mesoscutal sulcus present. Notaulus present, straight and extends the length of the mesoscutum (percurrent), not connected to the median mesoscutal sulcus posteriorly. Scutoscutellar sulcus present and foveolate. Scutoscutellar sulcus adjacent and contiguous to transscutal articulation. Mesoscutellum 1.1 × as long as wide. Axillular carinae absent. Sternaulus present, elongate and reaching 3 / 4 of mesopleuron length. Anterior mesopleural sulcus present. Mesopleural sulcus shape: straight. Mesopleural pit present. Lateral propodeal carina forming an inverted “ Y ” shape.

Wing (Fig. 4 F View Figure 4 ). Fore wing total length 1.7 mm, translucent with relatively nearly triangular pterostigma. Pterostigma length vs. width: 2.1–2.3. Radius (408 μm), slightly curved medially, 1.6 × as long as the length of pterostigma. Fore wing with translucent brown irregular stripes and dense orange-brown pubescence; wing marginal hairs longer than those on the inner wing surface; hind wing venation reduced, translucent.

Metasoma (Fig. 4 G View Figure 4 ). Metasoma 1.7 × as long as wide (Length / width / height = 814 / 487 / 390 μm). Metasoma shape: olive-shaped or oval. Syntergum with five distinct gastral carinae, reaching 1 / 5 of syntergum length; syntergal translucent patch transverse. Rest of tergites smooth, but with sparse hairs on both sides.

Male genitalia (Fig. 5 View Figure 5 ). Harpe length slightly shorter than gonostipes, with numerous long and slender apical setae; harpe orientation: medial; harpe shape: simple and not bilobed, columnar; lateral setae of harpe present, but sparse. Parossiculus not fused. Gonostipes longer than wide, not fused with parossiculus. Penisvalva curved proximally. Gonossiculus and gonossiculus spine present; apical parossiculal setae present. Male S 9 shape: stipitoplanar with a planar apex. The spiculum of S 9 long, reaching 1 / 2 of S 9. S 9 has six setal patches at the end.

Female (Fig. 6 View Figure 6 ). Same as the males, except for the following characters: body length = 1.7 mm; cranium, mesosoma and metasoma amber; scape, pedicel and F 1 – F 5 aurantium, F 6 to F 9 brown; syntergum and metasoma gaster amber (Fig. 6 G View Figure 6 ); antennal pedicel long, slightly longer than any individual flagellomere from F 1 to F 8 of the same individual; legs tawny, coxa amber. Wider mesosoma (length / width = 585 / 405 μm).

Remarks.

This new species is similar to C. bipunctatus Kieffer, 1907 in body length, axillular carinae, lateral propodeal carinae, but can be distinguished by the shorter, rod-shaped harpe (inverted U-shape in C. bipunctatus ).

Distribution.

China ( Chongqing).

Etymology.

Consistent with the genus name, the species name is a Latin masculine adjective meaning “ clubbed ”, referring to the small club-shaped harpe of the male genitalia in this species.