Apophysius baolocensis Pham, Matsumoto & Broad, 2020

Pham, Nhi Thi, Matsumoto, Rikio, Konishi, Kazuhiko, Sheng, Mao-Ling & Broad, Gavin R., 2020, A review of the genus Apophysius Cushman (Ichneumonidae: Phygadeuontinae) with descriptions of six new species, Zootaxa 4802 (2), pp. 301-316 : 302-305

Apophysius baolocensis Pham, Matsumoto & Broad , new species

( Figures 1b , 2 )

Material examined. Holotype: female ( OMNH), VIETNAM, Lam Dong Province, Bao Loc, Dam Bri , 800 m, R. Matsumoto coll., 2 May 2000; paratype: 1 female ( IEBR), same data as holotype.

Diagnosis. Reddish brown with black head dorsally; subtegular ridge sharply angled; median longitudinal stripe of mesoscutum narrow anteriorly, not expanding out of lateral longitudinal groove; scutellum strongly convex, round laterally; propodeum with area superomedia raised into a tubercle, lower than level of metanotum; wings uniformly weakly infuscate.

Description of holotype. Head. Antenna with 42 flagellomeres, first flagellomere 2.6× longer than wide, 1.5× length of second; face 0.55× as high as wide with weak impression from antennal socket toward clypeus; clypeus 0.7× as high as wide, separated from face by weak impression; malar space short, about 0.15× mandibular basal width ( Fig. 2c ); ocellar-ocular distance about 2.0× diameter of ocellus, 4.0× interocellar distance ( Fig. 2b ).

Mesosoma. Epomia strong, extending 3/4 distance to dorsal margin of pronotum; mesoscutum with dense setae, scuto-scutellar groove smooth, without weak longitudinal impression medially; scutellum strongly convex, with dense setae, lateral carina present basally ( Fig. 2d ), metanotum with conical projection medially; mesopleuron with sternaulus on anterior 0.45, epicnemial carina sinuous dorsally, extending to anterior margin, subtegular ridge in dorsal view sharply angled ( Fig. 2b ); mesosternum with posterior transverse carina strong except broad interruption at level of inner half of mid coxa; propodeum with strongly raised carinae, area superomedia projecting as a ‘horn’ but under level of metanotum, median longitudinal carinae divergent below area superomedia, with dense transverse striations connecting two carinae ( Fig. 2e ), propodeal spiracle oval; fore basitarsus 0.9× as long as tarsomeres 2–5 combined; mid basitarsus 0.9× as long as tarsomeres 2–5 combined; hind basitarsus slightly shorter than tarsomeres 2–5 combined. Fore wing length 8.3 mm, vein M&RS opposite 1 cu-a, vein 2 rs-m about 0.75× as long as vein 3 rs-m, hind wing with first abscissa of vein CU 1.2× as long as vein cu-a; distal ends of RS, M and CU obsolete, present as traces.

Metasoma. First tergite smooth, about 5.9× as long as posterior width, posteriorly dorsally and laterally with long setae; second tergite 0.76× as long as first tergite, 3.4× as long as anterior width, 1.8× as long as posterior width; metasoma with second tergite onward densely minutely punctate, with dense setae, shorter than setae on mesosoma; ovipositor 0.63× as long as hind tibia.

Colour. Reddish brown with black markings as follow: head dorsally, gena and occiput, posterior corner of pronotum dorsally, three longitudinal stripes on mesoscutum, scuto-scutellar groove, scutellum posteriorly, axilla, mesopleuron with a spot dorsal to sternaulus and a spot on speculum ventral to hind wing base, anterior margin of metapleuron, area basalis and at level of propodeal spiracle, and ovipositor sheath. Antenna reddish, except some distal brown flagellomeres. Fore and mid coxae, trochanters, tibiae and fore tarsomeres 1–4, anterior 0.25 of first tergite, narrow posterior stripes on tergites 1–2 yellow. Metasomal tergites dull reddish posteriorly. Sternites dull yellow, with conspicuous brown speckling (at bases of setae) particularly on sternites 3 and 4. Wings hyaline and tinged with brown.

Variation. The paratype specimen has the posterior corner of the pronotum brown dorsally

Male. Unknown.

Comparative notes. Together with A. constrictus sp. nov., these new species are unique in having the sharply angled subtegular ridge in dorsal view. Unlike A. constrictus , A. baolocensis has a partly black head, smaller black stripes on the mesopleuron, round scutellum laterally and median longitudinal carinae divergent posteriorly.

Etymology. Named after the type locality, Bao Loc District, Lam Dong Province, Vietnam.

Distribution. Currently known only from Lam Dong Province, Central Highlands of Vietnam.

Figures

FIGURE 1. a. Apophysius bakeri Cushman, holotype female (source: NMNH); b. Apophysius baolocensis sp. nov., holotype female; c. Apophysius constrictus sp. nov., holotype female; d. Apophysius latus sp. nov., holotype female; e. Apophysius takasukai sp. nov., holotype female; f. Apophysius taynguyenensis sp. nov., holotype female

FIGURE 2. Apophysius baolocensis sp. nov., holotype female: a. lateral view of head and mesosoma; b. dorsal view of head and mesoscutum; c. face; d. dorsal view of scutellum; e. dorsal view of propodeum (scale bar for Figs 2a, 2b = 1 mm, for Figs 2c, 2d, 2e = 0.5 mm)