Aprostocetus maculosus, Li & Liu & Chen & Zu & Li, 2025

Aprostocetus maculosus sp. nov.

Figs 1–6 View Figures 1–6

Type material.

Holotype, female [on card], China • Hainan Province, Hainan Limushan Forest Park , 30. IV. 2021, Gang Fu, Ming-Rui Li, by sweeping. Deposited in YCTU . Paratypes: • 5 females, 3 males: [2 females, 2 males on cards], same data as holotype; [1 female, 1 male on cards] , • Hainan Province, Chengmai County, Jinjiang Town , 24. IV. 2021, Gang Fu, Ming-Rui Li, by yellow-pan trapping; [ 2 females on slides] , • Hainan Province, Wuzhishan City, Qianchi Village , 24. IV. 2021, Gang Fu, Ming-Rui Li, by sweeping. All deposited in YCTU .

Diagnosis.

Mesosoma with area surrounding median line black; metasoma black with two yellow spots on 1 st - 5 th gastral tergites dorsally; mid lobe of mesoscutum with two rows of adnotaular setae on each side, each row with 5–6 setae. Among Chinese species of Aprostocetus , A. maculosus is similar to A. pinus in having a yellow body with black markings but can be separated from this species by the following combination of characters: area surrounding median line black (vs yellow); mid lobe of mesoscutum with two rows of adnotaular setae on each sided (vs one row). Among non-Chinese species, A. maculosus is similar to A. narius Narendran, 2007 in its yellow body with black markings but can be separated from this species by the following combination of characters: POL 1.7–2.0 × OOL (vs 4.5 ×); mandibles distinctly tridentate (vs bidentate); propodeum with median carina broad and short (vs absent).

Description.

Female. Body (Fig. 1 View Figures 1–6 ) length 1.9–2.2 (2.2) mm. Head and mesosoma mainly yellow, scape posterior 1 / 3 brown on dorsal side, pedicellus and flagellum brown; area surrounding ocelli dark brown; occiput black; anterior 1 / 3 of pronotum black; area surrounding median line, anteromedial area of mid lobe of mesoscutum in some specimens, notaulus, anterior part of scapula and axillae black, usually reddish-brown areas around these black areas; area between submedian grooves mainly reddish-brown except anteromedial area dark brown, only anteromedial area reddish-brown in some specimens; dorsellum yellowish-white; propodeum black; legs yellow except terminal tarsomere brown; wings hyaline, veins brown. Metasoma yellow ventrally and laterally, black with two yellow spots on 1 st - 5 th gastral tergites dorsally, sometimes two yellow markings connected to form one yellow marking, 6 th and 7 th gastral tergites mainly yellow, only the end black; ovipositor sheaths black.

Head in dorsal view (Fig. 1 View Figures 1–6 ), 1.8–2.2 × (1.8 ×) as broad as long, slightly broader than mesosoma. Frons with a median line, not depressed, without reticulation; POL 1.7–2.0 × (1.9 ×) OOL, OOL 1.8–2.0 × (2.0 ×) OD. Malar sulcus straight; malar space 0.65 × as long as eye; mouth cavity 1.3 × as wide as malar space. Anterior margin of clypeus bidentate, mandibles distinctly tridentate. Lower edge of antennal torulus above ventral edge of eyes. Antenna (Fig. 4 View Figures 1–6 ) with scape shorter than an eye, not reaching vertex, 4.0–4.3 × (4.3 ×) as long as broad, pedicellus shorter than to as long as F 1, 1.8–2.1 × (1.8 ×) as long as broad, F 1 longer than F 2 and F 3, F 1 - F 3: 2.0–2.5 × (2.5 ×), 2.0–2.1 × (2.0 ×), 1.6–2.0 × (1.7 ×) as long as broad respectively; clava slightly shorter than to as long as F 2 and F 3 combined, 2.8–3.1 × (3.1 ×) as long as broad, terminal spine shorter than C 3, 0.3–0.4 × (0.4 ×) as long as C 3, flagellum with short setae and numerous sensilla on each segment.

Mesosoma (Figs 1 View Figures 1–6 , 3 View Figures 1–6 ) 1.3–1.5 × (1.4 ×) as long as broad. Pronotum short, arched. Mid lobe of mesoscutum 1.2 × as broad as long, median line distinct, reticulation fine, with 2 rows of adnotaular setae on each side, each row with 5–6 setae. Scutellum 1.4 × as broad as long, anterior pair of setae situated behind middle, submedian grooves and sublateral grooves distinct, distance between submedian grooves broader than distance between submedian grooves and sublateral grooves. Dorsellum partly covered by hind edge of scutellum, 4.0 × as broad as long. Propodeum medially slightly shorter than dorsellum, median carina broad and short, reticulation fine, spiracle subcircular, moderate size, almost touching hind edge of metanotum, callus with three to four setae on each side. Legs (Fig. 5 View Figures 1–6 ) slender, spur of metatibia slightly shorter than the length of metabasitarsus. Forewing (Fig. 6 View Figures 1–6 ) 2.0–2.4 × (2.2 ×) as long as broad, SMV with three to four (three) dorsal setae, costal cell relatively broad, shorter than MV, 0.8 × as long as MV; MV 3.5–4.0 × (3.9 ×) as long as STV; speculum closed and extending below MV.

Gastral petiole present and transverse. Gaster (Fig. 1 View Figures 1–6 ) lanceolate, 1.8–2.0 × (1.8 ×) as long as head and mesosoma combined, 2.8–3.2 × (3.0 ×) as long as broad, longest seta of each cercus 2.0 × longer than the second longest seta. Ovipositor sheaths distinctly extending beyond tip of metasoma, approx. as long as 7 th gastral tergite.

Male. Very similar to female. Body (Fig. 2 View Figures 1–6 ) length 1.4 mm. Metasoma sometimes with more extensive black markings (Fig. 2 View Figures 1–6 ). Antenna with scape 3.5 × as long as broad, ventral plaque placed in the middle, 0.34 × as long as scape; pedicellus longer than F 1, 1.7 × as long as broad; flagellum with numerous long setae at base of each segment, F 1 - F 4: 1.4 ×, 2.2 ×, 2.7 ×, 2.7 × as long as broad respectively; clava 7.1 × as long as broad, terminal spine short; sensilla numerous, oblong. Mesosoma 1.56 × as long as broad. Forewing with costal cell slightly shorter than MV, MV 3.2 × as long as STV. Metasoma slightly longer than mesosoma, 2.4 × as long as broad.

Host.

Unknown.

Distribution.

China ( Guangdong, Hainan, Guangxi).

Etymology.

The epithet maculosus refers to the many spots of the gaster dorsally.