Chrysocryptus brevis, Pham & Broad & Achterberg, 2019

Pham, Nhi Thi, Broad, Gavin R. & Achterberg, Cornelis van, 2019, A review of the genus Chrysocryptus Cameron (Ichneumonidae: Phygadeuontinae), with description of a new species, Raffles Bulletin Of Zoology 67, pp. 60-66 : 62-65

Chrysocryptus brevis , new species

( Fig. 2 )

Material examined. Holotype: female ( IEBR), VIETNAM: Tuyen Quang Province, Na Hang District, Giang Chi village , 22°35′2.7″N, 105°19′41.7″E, 862 m a.s.l., hand net, V.T. Hoang coll., 13 September 2017 . Paratype: 1 male ( IEBR), VIETNAM: Phu Tho Province, Xuan Son National Park , hand net, V.T. Hoang coll., 19 September 2005 .

Diagnosis. Head and mesosoma black, except prothorax reddish, metasoma reddish brown; area superomedia with posterior transverse carina strongly arched; ovipositor about as long as hind tibia.

Description of holotype. Head. Antenna with 40 flagellomeres, first flagellomere 4.3× longer than wide, 1.2× length of second; between antennal sockets with bare deep groove separatedfrom shallow median groove of frons; face 0.5× as high as wide; clypeus separated from face by impression, about 0.55× as high as wide; malar space short, about 0.3× mandible basal width; interocellar distance about 0.2× ocellar-ocular distance.

Mesosoma. Epomia strong, sinuous ventrally, as long as mandibular basal width; scutellum polished with sparse punctures; mesopleuron with sternaulus strong, extending to posterior margin; propodeum with posterior transverse carina strongly arched at posterior of area superomedia, posterior width about 2.1× as long as anterior width, spiracle round, close to anterior transverse carina; fore basitarsus slightly shorter than tarsomeres 2–5 combined; mid basitarsus about 1.1× tarsomeres 2–5 combined; hind basitarsus 1.2× tarsomeres 2–5 combined. Fore wing length 7.1 mm, vein M&RS opposite 1 cu-a, vein 2 rs-m about 1.1× 3 rs-m, vein 1 m-cu&M with a short ramulus, hind wing with first abscissa of vein CU about 1.7× vein cu-a; distal ends of RS and M obsolete, present as traces.

Metasoma. First tergite smooth and polished, about 5.4× as long as posterior width, laterally with long setae, spiracle at middle; second tergite 0.8× as long as first tergite, 3.7× as long as anterior width, 1.9× as long as posterior width, anterolaterally with two short oblique impressions; metasoma with second tergite onward densely minutely punctate, with short setae; ovipositor sheath 1.0× as long as hind tibia.

Colour. Headand mesothorax black, except clypeus, mandible except teeth and prothorax reddish yellow. Fore leg yellow. Mid and hind legs and metasomal tergites reddish brown.

Male. Similar to female except antenna with 41 flagellomeres, mesoscutum with notauli not convergent posteriorly, propodeum with posterior transverse carina slightly arched, first tergite about 6× as long as posterior width.

Comparative notes. The new species can be distinguished from C. aureopilosus Cameron by its shorter ovipositor sheath (1.0× as long as hind tibia versus 2.0×) and by its broader metasomal tergite 2 (3.7× as long as anterior width versus 6.4×, 1.9× as long as posterior width versus 3.0×). In addition, the new species has a reddish clypeus and yellow pronotum (versus black clypeus and black pronotum posteriorly in C. aureopilosus ).

Etymology. The new species is named after its short ovipositor.

Distribution. Currently known only from Tuyen Quang and Phu Tho provinces, northern Vietnam.

Figures

Fig. 2. Chrysocryptus brevis Pham, Broad & van Achterberg, new species, holotype female. a, dorsal view; b, face; c, dorsal view of head and mesosoma; d, dorsal view of scutellum and propodeum; e, lateral view of metasoma and ovipositor; f, dorsal view of metasomal tergites 2–3 (each scale bar = 1.0 mm).