Apophysius constrictus 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 : 305-306

Apophysius constrictus Pham, Matsumoto & Broad , new species

( Figures 1c , 3 )

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

Diagnosis. Reddish brown with black markings; subtegular ridge sharply angled; median longitudinal stripe of mesoscutum narrow anteriorly, not expanding out of lateral longitudinal groove; scutellum strongly convex, compressed laterally; propodeum with area superomedia raised into a tubercle, distinctly higher than level of metanotum, median longitudinal carinae confluent together below area superomedia; wings uniformly weakly infuscate.

Description of holotype. Head. Antenna with 47 flagellomeres, first flagellomere 2.6× longer than wide, 1.5× length of second; dorsal margin of face with small tubercle between antennal sockets; face 0.5× 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. 3c ); ocellar-ocular distance about 2.2× diameter of ocellus, 4.9× interocellar distance ( Fig. 3b ).

Mesosoma. Epomia strong, extending 2/3 distance to dorsal margin of pronotum; mesoscutum with dense setae, scuto-scutellar groove with weak longitudinal impression medially; scutellum strongly convex, compressed laterally, with dense setae, lateral carina present basally ( Fig. 3d ), 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; mesosternum with posterior transverse carina strong except broad interruption at level of inner half of mid coxa; propodeum with strongly raised carinae, lateromedian longitudinal carinae strongly raised posteriorly, area superomedia strongly projecting as a ‘horn’, median longitudinal carinae confluent below area superomedia ( Fig. 3e ), propodeal spiracle oval; fore basitarsus 0.9× as long as tarsomeres 2–5 combined; mid basitarsus 0.94× as long as tarsomeres 2–5 combined; hind basitarsus equal to tarsomeres 2–5 combined. Fore wing length 9.4 mm, vein M&RS opposite 1 cu-a, vein 2 rs-m about 0.9× as long as vein 3 rs-m, hind wing with first abscissa of vein CU as long as vein cu-a; distal ends of RS, M and CU obsolete, present as traces.

Metasoma. First tergite smooth, about 6.1× as long as posterior width, posteriorly dorsally and laterally with long setae; second tergite 0.75× as long as first tergite, 4.0× as long as anterior width, 2.4× as long as posterior width; metasoma with second tergite onward densely minutely punctate, with dense setae, shorter than setae on mesosoma; ovipositor 0.72× as long as hind tibia.

Colour. Reddish brown with black markings as follow: posterior corner of pronotum dorsally, three longitudinal stripes on mesoscutum, scuto-scutellar groove, scutellum posteriorly, axilla, mesopleuron with large black marks dorsal to sternaulus and on speculum ventral to hind wing base. Antenna reddish, fading to brown distally. Anterior margin of metapleuron, area basalis and level of propodeal spiracle, ovipositor sheath and fifth tarsomeres brown. Fore and mid coxae, trochanters, tibiae and fore tarsomeres 1–3, anterior 0.25 and posterior 0.1 of first tergite and posterior 0.3 of tergite 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.

Male. Similar to holotype female, except antenna with 44 flagellomeres, hind wing with first abscissa of vein CU 1.3× as long as vein cu-a.

Comparative notes. Most similar to A. baolocensis sp. nov. It can be recognized by the laterally compressed scutellum, the dorsally reddish brown head, the large black mark on the mesopleuron, the higher projection of the area superomedia, the confluent median longitudinal carinae, and the longer ovipositor.

Etymology. Named after the laterally compressed scutellum.

Distribution. Currently known only from Lam Dong Province, the 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 3. Apophysius constrictus 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 3a, 3b = 1 mm, for Figs 3c, 3d, 3e = 0.5 mm)