Canalopius periscopus Wu & van Achterberg, 2018

Wu, Qiong, Achterberg, Cornelis van, Sheng, Ying-yi & Chen, Xue-xin, 2018, A new genus from Vietnam (Hymenoptera, Braconidae, Opiinae), and the description of two new species, Journal of Hymenoptera Research 66, pp. 1-13 : 1

Canalopius periscopus Wu & van Achterberg sp. n.

Figs 1 , 2-11

Type material.

Holotype, ♀ ( RMNH), "N. Vietnam: Hoa Binh, Pa Co Hang Kia N.R. , 20°44'35"N, 104°56'22"E, 1030 m, 9-23.x.2009, Mal[aise] tr[ap] 2, C. van Achterberg & R. de Vries ". Paratypes: 1 ♀ ( IEBR), "S. Vietnam: Dak Lak, Chu Yang Sin N.P. , n[ea]r dam, 800-940 m, 2-10.vi.2007, Mal[aise] traps, C. van Achterberg & R. de Vries, RMNH’07” ; 1 ♂ ( RMNH), same data as paratype, but c. 500 m, 3-9.vi.2007 .

Description.

Holotype, ♀, length of body 2.8 mm, of fore wing 2.6 mm.

Head. Antenna with 27 segments, bristly setose and 1.05 times as long as fore wing; third segment1.3 times as long as fourth segment, length of third, fourth and penultimate segments 2.7, 2.0 and 2.0 times their width, respectively (Fig. 10 ); length of maxillary palp 0.9 times height of head (Fig. 4 ); length of eye in dorsal view 2.6 times temple (Fig. 8 ); temple and vertex shiny, smooth, and with sparse setae; occiput and vertex medially with very deep vertical furrow up to between posterior ocelli; vertex depressed near posterior ocelli; stemmaticum reversed “Y” - shaped and abruptly protruding dorsally, with long setae dorsally and with anterior ocellus on anterior branch far above frons (Figs 1b-e , 5 , 8 ); OOL: diameter of ocellus: POL= 13:4:3; occipital carina absent; hypostomal carina narrow (Fig. 9 ); face smooth and sparsely setose (Fig. 7 ); frons smooth behind antennal sockets; labrum glabrous and smooth, slightly depressed; clypeus transverse, smooth, convex, and its ventral margin truncate (Fig. 7 ); width of clypeus 3.4 times its maximum height and 0.5 times width of face; hypoclypeal depression rather large (Fig. 7 ); mandible slightly twisted, its basal half dorsally and ventrally with fine carina, nearly straight ventrally, apically gradually narrowed and with second teeth much smaller than first tooth (Figs 2 , 4 ); malar suture absent; malar space 0.5 times as long as basal width of mandible.

Mesosoma. Length of mesosoma 1.4 times its height; dorsal pronope round and rather large, filled with white tissue; pronotal side largely smooth, but crenulate dorso-anteriorly and posteriorly (Fig. 4 ); propleuron flattened and largely glabrous except apically; epicnemial area smooth; precoxal sulcus medium-sized, moderately crenulate and distinctly impressed, but absent anteriorly and posteriorly (Fig. 4 ); remainder of mesopleuron smooth and shiny, sparsely setose antero-dorsally and postero-ventrally; only ventral half of pleural sulcus distinctly crenulate; mesosternum densely setose; mesosternal sulcus deep, medium-sized and crenulate; postpectal carina absent; anterior groove of metapleuron largely smooth except a few crenulae; mesoscutum very shiny, smooth and with band of setae indicating imaginary course of notauli (Fig. 5 ); notauli only present basally and absent on disc; medio-posterior depression of mesoscutum absent; scutellar sulcus deep and with 7 short crenulae, parallel-sided; scutellum flattened and smooth, (Figs 5 , 6 ); lateral axillar lamella narrow; dorsal surface of propodeum coarsely crenulate and narrow, posteriorly bordered by curved carina, medio-longitudinal carina complete, with some short rugae medio-dorsally, and remainder largely smooth (Fig. 6 ).

Wings. Fore wing: 1-SR 0.6 times longer than 1-M (Fig. 2 ); pterostigma wide triangular; 1-R1ending at wing apex and1.4 times as long as pterostigma; r long and linear with 3-SR with obtuse angle; r-m not tubular; r:3-SR:SR1 = 7:32:58; 2-SR:3-SR:r-m = 15:32:16; 1-M curved and SR1 nearly straight; m-cu distinctly postfurcal and straight; cu-a slightly postfurcal, nearly interstitial, and 1- CU 1 widened; 1- CU 1:2- CU 1 = 3:31; first subdiscal cell closed; CU 1b medium-sized; M+ CU 1 unsclerotized. Hind wing: 1-M of hind wing straight, resulting in subparallel-sided cell apically; M+ CU:1-M:1r-m = 12:10:7; cu-a straight; SR absent (Fig. 3 ).

Legs. Length of femur, tibia and basitarsus of hind leg 3.7, 7.8 and 2.7 times as long as width, respectively (Fig. 11 ); femur moderately setose, tarsus and tibia densely setose.

Metasoma. Length of first tergite 1.1 times its apical width, convex and irregularly rugose medio-posteriorly and remainder largely smooth (Fig. 6 ), dorsal carinae strong basally and reaching apex of tergite, dorsope absent; second suture almost invisible; basal depressions of second tergite shallow, wide and oblique, and second tergite 0.8 times as long as third tergite; second and following tergites smooth, shiny and with row of setae posteriorly; combined length of second and third metasomal tergites 0.3 times total length of metasoma; setose part of ovipositor sheath 0.1 times as long as fore wing (entire visible sheath 0.14 times), 0.5 times first tergite (entire sheath 0.9 times) and 0.3 times hind tibia (entire sheath 0.4 times); hypopygium nearly 0.2 times as long as metasoma, truncate apically and not reaching apex of metasoma (Fig. 11 ).

Colour. Dark brown; head (but teeth of mandible dark brown and stemmaticum black), scape ventrally, tegulae, mesoscutum laterally and imaginary courses of notauli and second tergite dorsally brownish yellow; scape dorsally, pedicellus ventrally, pronotal side dorsally and mesopleuron dorsally brown; pterostigma, veins, remainder of metasoma and ovipositor sheath largely dark brown; palpi, mandible, and legs pale yellowish (but telotarsus brown); fore wing membrane subhyaline.

Variation. Length of fore wing 2.0- 2.6 mm, of body 2.1-2.8 mm; antennal segments 25 (1 ♂) or 27 (1 ♀), length of first tergite 1.1-1.3 times its apical width; mesosoma of male entirely black, of female paratype mesoscutum, scutellum, prothorax and dorsal half of mesopleuron brownish yellow.

Distribution.

Vietnam.

Biology.

Unknown.

Etymology.

Name is derived from “peri” (Greek for “around”) and “skopos” (Greek for “watcher”) because the anterior ocellus is protruding from the head like a periscope.

Figures

Figure 1. Canalopius periscopus sp. n., ♀, holotype. a habitus, lateral aspect b-e stemmaticum and median furrow of vertex at different angles.

Figures 2 - 11. Canalopius periscopus sp. n., ♀, holotype. 2 fore wing 3 hind wing 4 head and mesosoma, lateral aspect 5 head and mesosoma, dorsal aspect 6 propodeum and first third metasomal tergites, dorsal aspect 7 head, anterior aspect 8 head, dorsal aspect 9 head, lateral aspect 10 antenna 11 hind leg, lateral aspect.