Separatatus platystigma Zhu, Achterberg & Chen, 2025, sp. nov.
Creators: name: Zhu, Jiachen
name: Achterberg, Cornelis Van
name: Chen, Xuexin
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Separatatus
Separatatus platystigma

description: Separatatus platystigma sp. nov.
Figs 17–18
Type material. Holotype, ♀ (ZJUH), “ [NE. China:] Inner Mongolia, 4.vi.2017, YPT, No. 201850001”.
Description. Holotype, ♀, length of body 5.3 mm, of fore wing 5.7 mm.
Head. Comparatively transverse, width of head 1.6 × its lateral length (Fig. 18I); antenna incomplete, with 22 antennomeres remaining, first flagellomere (including annellus) 0.9 × as long as second flagellomere, length of first and second flagellomere 3.0 and 3.3 × as long as their width, respectively (Fig. 8I); length of maxillary palp 1.3 × height of head; eye glabrous, 1.5 × as long as temple in dorsal view (Fig. 18I), eye in lateral view 1.35 × higher than wide (Fig. 18K); frons flat (Fig. 18I); vertex rather convex (Fig 18I); OOL:diameter of ocellus:POL= 13:4:8; face 2.2 × wider that high, smooth with small inconspicuous punctures (Fig. 18J); clypeus rather small, truncate and slightly convex laterally (Fig. 18J); malar space absent; mandible moderately widened dorsally, dorsal teeth large and lobe-shaped, lateral teeth rather small and lobe-shaped, middle tooth curved; medial length of mandible 2.0 × its maximum width (Figs 18L–M).
Mesosoma. Length of mesosoma 1.6 × its height (Fig. 18C); pronope absent; medio-anteriorly pronotum crenulate, remainder of pronotum smooth; epicnemial area widely crenulated (Fig. 18C); precoxal sulcus widely crenulate, only reaching anterior edge of epicnemial area, remaining removed from middle coxa (Fig. 18C); pleural sulcus crenulated; episternal scrobe round and deep (Fig. 18C); metapleuron rugose (Fig. 18C); notauli incomplete, only present anteriorly, and distinctly crenulated (Fig. 18D); medio-posterior depression deep and long, with some carinae, almost extending to middle of mesoscutum, mesoscutum smooth and bare; scutellar sulcus deep, with three longitudinal carinae, sulcus 4.0 × wider than its maximum length (Fig. 18D); scutellum smooth; surface of propodeum densely reticulate-rugose, with medio-longitudinal carina distinctly protruding in lateral view, areola absent posteriorly, spiracle of propodeum large, diameter of its opening more than 1/5 of minimum distance from spiracle to anterior edge of propodeum (Fig. 18E).
Wings (Fig. 18A–B). Pterostigma short and wide, 3.5 × longer than its maximum width; vein r 0.45 × width of pterostigma. r:3-SR:SR1 = 7:26:50; SR1, 1-SR+M nearly straight and 2-SR curved; cu-a postfurcal, short; 1- CU1:2-CU1 = 5:24; 3-CU1 as long as CU1b; 2-SR:3-SR:r-m = 30:34:10; m-cu postfurcal, slightly converging to 1-M posteriorly; first subdiscal cell 2.4 × as long as wide; M+CU1 unsclerotised. Hind wing: M+CU: 1-M:1r-m = 30:17:12; m-cu absent.
Legs. Hind coxa smooth, with long setae (Fig. 18G); tarsal claws rather robust and shorter than arolium; length of femur, tibia and basitarsus of hind leg 3.7, 9.0 and 5.0 × their width, respectively; apical bristles of first-fourth hind tarsal segments absent.
Metasoma. Length of first tergite 0.8 × its apical width, its surface longitudinally striate, its dorsal carinae widely separated from each other (Fig. 18F); laterope present; dorsope rather large; second tergite longitudinally striate anteriorly; setose part of ovipositor sheath 0.25 × as long as fore wing (total visible sheath 0.29 times), flattened and sparsely setose and 0.82 × as long as hind tibia.
Colour. Reddish black (Fig. 17); mandible, palpi, ventral rim of eyes and trochanter, basal and apical part of tibia, tarsi of legs yellowish; pterostigma and veins brown, wing membrane hyaline.
Comparative diagnosis. The new species can be separated from other known species by the reddish black body, widened pterostigma medially, and comparatively long notauli, combined with long and sculptured medio-posterior depression of the mesoscutum.
Etymology. Named “ platystigma ” because of the medially widened pterostigma: “ platy ” is Greek for “broad”.
Etymology. Named “ platystigma ” because of the widened medially pterostigma: “platys” is Greek for “broad”.
description: Published as part of Zhu, Jiachen, Achterberg, Cornelis Van & Chen, Xuexin, 2025, A revision of five genera of Alysiini (Hymenoptera, Braconidae, Alysiinae) from China, with description of five new species, pp. 401-438 in Zootaxa 5569 (3) on pages 423-425, DOI: 10.11646/zootaxa.5569.3.1, http://zenodo.org/record/14734162