Chorinaeus femiae Ranjith & Butcher, 2024

Ranjith, A. P. & Butcher, Buntika A., 2024, First record of the genus Chorinaeus Holmgren, 1858 (Hymenoptera: Ichneumonidae) from India and Thailand with the description of two new species, Zootaxa 5463 (2), pp. 283-290 : 287-290

publication ID	https://doi.org/ 10.11646/zootaxa.5463.2.8
publication LSID	lsid:zoobank.org:pub:4DEA8F13-0BC8-4A6C-9C7F-803F04F8772D
DOI	https://doi.org/10.5281/zenodo.11611440
persistent identifier	https://treatment.plazi.org/id/CFD14E01-C201-4BDA-9BC6-1744F710EE1D
taxon LSID	lsid:zoobank.org:act:CFD14E01-C201-4BDA-9BC6-1744F710EE1D
treatment provided by	Plazi
scientific name	Chorinaeus femiae Ranjith & Butcher
status	sp. nov.

Treatment

Chorinaeus femiae Ranjith & Butcher sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:CFD14E01-C201-4BDA-9BC6-1744F710EE1D

( Figs 3–4 View FIGURE 3 View FIGURE 4 )

Material examined. Holotype, female Thailand: Nan Province, Doi Phu Kha National Park ; 19°12.236’ N, 101°04.667’ E, altitude 1,341 m.a.s.l. 10.iii.2023, Malaise trap, coll. Worapong Atsawasiramanee ( CUMZ) GoogleMaps . Paratype, 1 female with same data as holotype except 3.ii.2023 ( CUMZ) GoogleMaps .

Description. Female. Body length 4.5 mm, length of fore wing 3.2 mm.

Head. Head transverse in dorsal view, not narrowed posteriorly behind eyes, 1.9 × as wide as long medially ( Fig. 3C View FIGURE 3 ), 1.2 × as wide as long medially in anterior view ( Fig. 3B View FIGURE 3 ); frons smooth, setose ( Fig. 3C View FIGURE 3 ); occiput smooth, setose ( Fig. 3C View FIGURE 3 ); temple not convex, smooth dorsally, setose, 0.5 × as long as transverse diameter of eye in lateral view ( Fig. 3E View FIGURE 3 ). Occipital carina present ( Figs 3C, E View FIGURE 3 ). Eyes glabrous, slightly emarginated at the level of antennal sockets ( Fig. 3B View FIGURE 3 ). Distance from lateral ocellus to eye 1.1 × diameter of ocellus. Distance between lateral ocellus 1.4 × distance from lateral ocellus to eye. Face not convex in lateral view, 1.1 × wider than long in anterior view, parallel sided, smooth, punctate, setose ( Fig. 3B View FIGURE 3 ). Clypeal sulcus not impressed ( Fig. 3B View FIGURE 3 ). Clypeus punctate, setose, slightly emarginated medio-posteriorly ( Fig. 3B View FIGURE 3 ). Length of malar space equal to basal width of mandible. Mandible bidentate with longer and wider upper tooth, lower tooth acute ( Fig. 3D View FIGURE 3 ). Antennae with 23 flagellomeres; all flagellomeres as long as wide except first and apical flagellomeres; first flagellomere 1.9 × as long as maximum width, 1.1 × as long as second flagellomere, apical flagellomere 2.6 × as long as wide.

Mesosoma. Mesosoma 1.6 × as long as high; mesoscutum smooth with a pair of pits subposteriorly, densely setose, without notauli, sides of mesoscutum with shallow groove ( Fig. 3F View FIGURE 3 ). Scuto-scutellar groove smooth and shallow without crenulations ( Fig. 3F View FIGURE 3 ). Scutellum as long as wide, lateral margin narrowing posteriorly, smooth, sparsely setose, sparsely punctate with distinct lateral carina extend till posterior margin ( Figs 3F View FIGURE 3 , 4A View FIGURE 4 ). Mesopleuron smooth, setose, speculum glabrous ( Fig. 3E View FIGURE 3 ). Epicnemial carina distinct, reaching anterior margin of mesopleuron ( Fig. 3E View FIGURE 3 ). Propodeum smooth, setose with parallel longitudinal dorsal carinae, anterior transverse carina absent, posterior transverse carina present laterally, medial sections of anterior and posterior transverse carina absent ( Fig. 4A View FIGURE 4 ); spiracles elongate, elliptical, connected with pleural carina ( Fig. 4B View FIGURE 4 ). Metapleuron smooth, setose, largely glabrous medially, with a few short longitudinal rugae ventrally, juxtacoxal carina complete ( Fig. 3E View FIGURE 3 ). Fore wing 3.0 × as long as wide. Fore wing vein 1cu-a postfurcal ( Fig. 4E View FIGURE 4 ). Hind femur 3.0 × as long as its maximum width in lateral view. Hind tibia 3.4 × as long as its maximum width. Ratio of length of hind tarsomeres 1–5, 4.3: 1.7: 1.5: 1.0: 1.6.

Metasoma. Metasoma coarsely and densely punctate-rugose ( Figs 4C, D View FIGURE 4 ). First metasomal tergite smooth between latero-median carinae, rest rugose, 0.9 × as long as apical width, with distinct dorso-lateral, ventro-lateral and pair of latero-median carinae ( Figs 4B–D View FIGURE 4 ). Second metasomal tergite 0.9 × as long as its apical width, without dorso-lateral carina and latero-median carinae complete ( Figs 4B–D View FIGURE 4 ). Third metasomal tergite 0.8 × as long as its apical width, with midlongitudinal carinae distinct basally ( Fig. 4D View FIGURE 4 ). Ovipositor sheath setose apically ( Fig. 4C View FIGURE 4 ).

Color. Body black; scape, pedicel, face, clypeus, maxillary and labial palps, frons antero-laterally, tegula, fore and mid legs, and hind tibia except medially yellow; mandible except apically, antennal flagellomeres, wing veins, hind tibia medially, ovipositor and ovipositor sheath yellowish brown.

Male. Unknown.

Distribution. Thailand.

Biology. Unknown.

Etymology. APR dedicates this species to his friend Ms Femi E. Benny, for her unwavering support, encouragements and most importantly her enthusiastic interest towards taxonomic research.

Comparative diagnosis. The new species, C. femiae comes close to C. ryukyuensis based on the color of the head. However, the new species differs from C. ryukyuensis in having the following differences: first flagellomere 1.9 × as long as wide (1.6 × in C. ryukyuensis ), first metasomal tergite sparsely punctate (rugose except smooth are between midlongitudinal carina in C. ryukyuensis ), and flagellum yellowish brown (dark brown to blackish in C. ryukyuensis ).