Entomacis clavata Chemyreva, 2018

Chemyreva, V. G. & Xu, Z. - F., 2018, The genus Entomacis Foerster, 1856 (Hymenoptera: Diapriidae) in South China, Far Eastern Entomologist 351, pp. 1-16 : 8-10

Entomacis clavata Chemyreva , sp. n.

Figs 15–19

TYPE MATERIAL. Holotype: ♀ ( ZISP), China: Guangdong Prov., Nankushan

National Forest Park, 29.VI 2015, V. Chemyreva. Paratypes: China: Guangdong

Prov., Nanling National Nature Reserve, 8–17.VIII 2010, 1♂, CH; same place, 22–

24.VIII 2010, 1♀, Xu Zai-fu ( SCAU); same label as holotype, 1♀ ( ZISP) .

DESCRIPTION. Holotype. Female. Body length 1.9 mm; fore wing length 1.9

mm; antenna length 1.3 mm.

Colour. Mesosoma and metasoma dark drown; head black; palpi, mandible, legs and A1–A5 yellow; A6 yellowish brown; A7–A13 brown.

Head in dorsal view transverse (23:15), wider than mesosoma (23:18), antennal shelf weakly developed. Head with numerous semi-recumbent setae, in lateral view higher than long (20:15). Face smooth and pubescent ( Fig. 19 ). Tentorial pit large.

Malar sulcus distinct. Clypeus convex, circular, smooth and pubescent. Epistomal sulcus distinct. Ratio of distance between pleurostomal carinae to width of head

6:22. Mandible short, strongly overlapping, bidentate, upper tooth longer. Eye bare,

large, higher than half of head (11:10), oval (11:9); height of eye/malar area 11:5.

Ocelli large; LOL equal to width of anterior ocellus; POL equal to half of OOL.

Occipital flange narrow.

Antennomeres without tiloids, with numerous semi-recumbent setae. Scape cylindrical and smooth. Antennae with abrupt 7-segmented clava ( Fig. 18 ), clavomeres weakly compressed; A7–A13 with MGS brush. In lateral view, connection between clavomeres located dorsally ( Fig. 18 ). Ratios of length to width of A1–A 13 in dorsal view: 20:4; 7:4; 6:2.5; 5.5:3; 5.5:3; 5.5:3.5; 6:4; 6:4.5; 6:4.5; 6:4.5; 5.5:4.5; 5:4; 8:4.

Mesosoma. Mesosoma in dorsal view longer than wide (30:18); in lateral view distinctly longer than high (30:22). Neck bare, with prolong grooves. Pronotum smooth, with few setae medially on dorsal side. Pronotal shoulders distinctly convex.

Propleuron and mesopleuron on ventral side with dense silver pubescence. Mesopleuron on lateral side smooth and bare. Matt mesopleural spot indistinct. Acetabular carina projecting. Epicnemial pit present and pubescent. Mesoscutum wider than long (25:15), with few long setae; notauli complete; humeral sulcus narrow,

developed along all lateral margin. Anterior scutellar pit transverse (7:5). Lateral scutellar pit narrow and shallow. Axillar depression with dense long setose.

Posterior scutellar pits fused together in deep groove. Metascutellum pubescent,

with low irregular sculpture on lateral side; median keel low, lateral keel more projecting. Mesopleural suture entire setose. Propodeum entirely dense setose,

convex dorsally. Area between upper plicae on dorsal side of propodeum wider than median length (9:8). Median propodeal keel complete, low, evenly projected ( Fig.

16). Upper and lower plicae weakly projected, plical process small. Nuchal area pubescent.

Figs 11–14. Entomacis spp. 11, 12 – E. alticeps ; 13, 14 ‒ E. leptos . 11, 13 – propodeum lateral view; 12, 14 – propodeum, dorsal view.

Wing. Apex of fore wing rounded. Costa sclerotize in basal half only.

Submarginal vein tubular, pigmented. Distal RS, distal M and distal CU absent,

M+CU absent, basal vein and 1CU weakly pigmented. Marginal vein longer than wide (8:3), shorter than stigmal vein (8:9). Ratio of width to length of fore wing 2:4.

Metasoma. Petiole in dorsal view longer than its median width (7:5), cylindrical,

with shallow longitudinal grooves; on ventral side bare, on lateral with few long setae. Apex of metasoma in dorsal view pointed. T2 smooth and bare, T2 notch distinct, T2 lateral grooves absent. Base T2 and S2 on Fig. 2. T3–T6 of type dirty.

S2 without lateral and medial grooves, with trace of setose line.

MALE. Body length 2.1 mm. Antenna as long as 2/3 of body ( Fig. 15 ), A1–A4

yellow, follows segments gradually darkened apically. A4 with emargination and keel developed from base to top of segments ( Fig. 17 ). Ratios of length to width of

A1–A13: 20:4; 8:4; 10:3; 10:3.5; 8:3.5; 7:2.5; 7:3.5; 7:4; 7:4; 7:4; 7:3.5; 6.5:3.5;

8:3. Petiole longer than female and distinctly elongate (8:3).

DIAGNOSIS. Entomacis clavata sp. n. differs from all known Palaearctic and

Oriental species by the following combination of the characters: head and face with numerous semi-recumbent setae; female antenna with abrupt 7-segmented clava;

malar sulcus distinct; notauli complete; propodeum entirely dense setose. The new species is the most closely related to E. laticeps from which it distinctly differs by following characters: the head and face densely pubescent; female antenna with abrupt 7-segmented clava; male antenna robust, as long as 2/3 of body; apex of fore wing rounded and costa sclerotize in basal half.

ETYMOLOGY. Derived from Latin clava, with reference to the female antenna with abrupt clava.

DISTRIBUTION. China (Guangdong).

Figures

Figs 15–19. Entomacis clavata sp. n. 15, 16 – habitus, lateral view (15 – male, 16 –