Dacnulysia chaenomastax Zhu, Achterberg & Chen, 2017, sp. nov.
Creators: name: Zhu, Jiachen
name: Achterberg, Cornelis Van
name: Chen, Xue-Xin
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dacnulysia
Dacnulysia chaenomastax

description: Dacnulysia chaenomastax sp. nov.
Figs 1–3
Type material. Holotype, ♀ (ZJUH), “ [S. China:] Zhejiang, Mt. Tianmu, 27.?.2011, Zhen Liu ”. Paratype, 1 ♀ (ZJUH), Zhejiang, Mt. Tianmu, 29.?.1984, Xiaojing Wu.
Diagnosis. Eye in dorsal view 1.1 × as long as temple; third segment (including annellus) 0.96 × as long fourth segment; mandible atypical, with four teeth, middle tooth narrow, acute, much longer than both lateral teeth and with an extra protuberance on third tooth (Figs 2 L, 3A); notauli complete and crenulate, but widely separate posteriorly (Fig. 2 D); vein 3-SR of fore wing subequal to 2-SR, m-cu of fore wing interstitial, nearly straight and slightly converging to 1-M posteriorly (Fig. 2 A); tarsal claws simple (Fig. 2 N); length of first tergite 2.6 × its apical width, constricted near its basal third, dorsope absent, but position indicated by elongate superficial impressions near constriction (Fig. 2 F); setose part of ovipositor sheath about 0.1 × as long as fore wing and 0.4 × hind tibia (Fig. 3 E).
Description. Holotype, ♀, length of body 4.8 mm, of fore wing 4.1 mm.
Head. Square and shiny in dorsal view (Fig. 2 J), width of head 1.2 × its lateral length, in anterior view subquadrate (Fig. 2 I), and 1.3 × wider than mesoscutum; antenna incomplete, with 30 remaining segments, bristly setose but basally less bristly, length of third segment (including annellus) 0.96 × as long as fourth segment, length of third and fourth segments 5.0 and 5.2 × their width, respectively (Fig. 2 M); length of maxillary palp 1.1 × height of head; eye in dorsal view 1.1 × as long as temple (Fig. 2 I); eye in lateral view 1.05 × higher than wide; frons convex laterally, but distinctly depressed behind antennal sockets; vertex rather convex and dorsally with few punctures (Fig. 2 J); OOL:diameter of ocellus:POL= 12:5:4; face 1.5 × wider than high, rather evenly convex, with some long setae and coarsely remotely punctate laterally and rugose-punctate medio-ventrally; clypeus semicircular and medium-sized, rather flat, with some punctures (Fig. 2 H); malar space absent; mandible with 4 teeth, middle tooth narrow, acute and with an extra protuberance on third tooth, with fourth tooth small and lobeshaped (Figs 2 I, 2L), medial length of mandible 2.6 × its maximum width and mandible ventro-basally protruding beyond base of mandible (Fig. 2 K).
Mesosoma. Length of mesosoma 2.2 × its height; pronope round and large; side of pronotum distinctly crenulate medio-anteriorly and posteriorly (Fig. 2 I); mesoscutum with lateral carina in front of tegulae (Fig. 2 D); epicnemial area crenulate; precoxal sulcus complete, crenulate and transverse; pleural sulcus coarsely crenulate; episternal scrobe medium-sized, round and connected by a furrow to pleural sulcus; metapleuron reticulate-rugose; notauli complete and crenulate, but separated posteriorly, connected by transverse rugae (Fig. 2 D); mesoscutum glabrous and strongly shiny; scutellar sulcus deep and wide, with one long carina and 2 short ones, sulcus 2.3 × wider than its maximum length; scutellum smooth (except some punctures) and rather flat (Fig. 2 D); surface of propodeum densely and coarsely reticulate-rugose, areola absent (Fig. 2 E).
Wings (Fig. 2 A). r:3-SR:SR1 = 3:16:34; 1-SR+M slightly sinuate; SR1 curved; r 0.3 × width of pterostigma; cu-a postfurcal; 1-CU1:2-CU1 = 1:5; 3-CU1 much shorter than CU1b; 2-SR:3-SR:r-m = 5:5:2; m-cu interstitial, nearly straight and slightly converging to 1-M posteriorly; first subdiscal cell 3.7 × as long as wide; M+CU1 largely unsclerotised. Hind wing: M+CU:1-M:1r-m = 18:35:10; m-cu absent.
Legs. Hind coxa partly punctate, without ventro-basal tubercle; tarsal claws moderately robust, about as long as arolium (Fig. 2 N); length of femur, tibia and basitarsus of hind leg 4.1, 10.8 and 6.5 × their width, respectively; length of hind tibial spurs 0.15 and 0.08 × its basitarsus; apical appendage of first-fourth hind tarsal segments absent, segments ventrally with dense bristles (Fig. 2 N).
Metasoma. Length of first tergite 2.6 × its apical width, its dorsal carinae widely separated posteriorly, medially convex (Fig. 2 E); laterope and dorsope absent, but dorsope indicated as elongate depression (Fig. 2 F); setose part of ovipositor sheath 0.08 × as long as fore wing (total visible sheath 0.14 ×), flattened and setose basally and 0.4 × as long as hind tibia (Fig. 3 E).
Colour. Black (Fig. 1); 4 basal segments of antenna brown (but fourth segment apically yellowish); metasoma (except first tergite), hind coxa basally and outer side medially, hind femur dorsally (except basally), apical third of tibia, and tarsus mainly except for third and fourth segments dark brown; mandible partly reddish-brown; remainder of legs and palpi pale yellowish; pterostigma and veins brown; wing membrane slightly infuscated.
Etymology. Named “ chaenomastax ” because of the large open gap between first and second tooth of the mandible: “chaeno” is Greek for “open” and “mastax” is Greek for “jaws”.
description: Published as part of Zhu, Jiachen, Achterberg, Cornelis Van & Chen, Xue-Xin, 2017, A new genus and subgenus of Alysiini from China, with the description of two new species (Hymenoptera, Braconidae, Alysiinae), pp. 360-370 in Zootaxa 4272 (3) on pages 363-365, DOI: 10.11646/zootaxa.4272.3.2, http://zenodo.org/record/892486