Chorinaeus amrithae 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 : 284-287

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.11611438
persistent identifier	https://treatment.plazi.org/id/2661C595-3C03-48EB-AB99-DB67A812C7D2
taxon LSID	lsid:zoobank.org:act:2661C595-3C03-48EB-AB99-DB67A812C7D2
treatment provided by	Plazi
scientific name	Chorinaeus amrithae Ranjith & Butcher
status	sp. nov.

Treatment

Chorinaeus amrithae Ranjith & Butcher sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:2661C595-3C03-48EB-AB99-DB67A812C7D2

( Figs 1–2 View FIGURE 1 View FIGURE 2 )

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 male, INDIA: Karnataka, Chamarajanagar, Biligiri Ranga Biligiri Rangaswamy Temple Tiger Reserve, Vellachy Metty , 14–30.x.2005, Malaise trap, coll. D.R. Priyadarsanan ( AIMB) .

Description. Female. Body length 7.1 mm, length of fore wing 4.8 mm.

Head. Head transverse in dorsal view, not narrowed posteriorly behind eyes, 2.1 × as wide as long medially ( Fig. 1C View FIGURE 1 ), 1.2 × as wide as long medially in anterior view ( Fig. 1B View FIGURE 1 ); frons smooth, setose laterally ( Fig. 1C View FIGURE 1 ); occiput smooth, glabrous medially rest setose ( Fig. 1C View FIGURE 1 ); temple smooth dorsally, setose, not convex, 0.7 × as long as transverse diameter of eye in lateral view ( Fig. 1E View FIGURE 1 ). Occipital carina present ( Figs 1C, E View FIGURE 1 ). Eyes glabrous, slightly emarginated at the level of antennal sockets ( Fig. 1B View FIGURE 1 ). Distance from lateral ocellus to eye 1.0 × diameter of ocellus. Distance between lateral ocellus 1.6 × distance from lateral ocellus to eye. Face not convex in lateral view, 1.3 × wider than long in anterior view, parallel sided, slightly widened posteriorly, smooth, punctate, setose ( Fig. 1B View FIGURE 1 ). Clypeal sulcus not impressed ( Fig. 1B View FIGURE 1 ). Clypeus punctate, setose, slightly emarginated medio-posteriorly ( Fig. 1B View FIGURE 1 ). Length of malar space equal to basal width of mandible. Mandible bidentate with longer and wider upper tooth, lower tooth acute ( Fig. 1D View FIGURE 1 ). Antennae with 35 flagellomeres; all flagellomeres as long as wide except first and apical flagellomeres; first flagellomere 1.6 × as long as maximum width, 1.5 × as long as second flagellomere, apical flagellomere 2.2 × as long as wide.

Mesosoma. Mesosoma 1.5 × as long as high; mesoscutum smooth with a short midlongitudinal groove subposteriorly, densely setose, without notauli, sides of mesoscutum with shallow groove ( Fig. 1F View FIGURE 1 ). Scuto-scutellar groove narrowly crenulate ( Fig. 1F View FIGURE 1 ). Scutellum distinctly wider than long, lateral margin parallel sided, smooth, densely setose, sparsely punctate with distinct lateral carina extend till posterior margin ( Figs 1F View FIGURE 1 , 2A View FIGURE 2 ). Mesopleuron smooth, setose, speculum glabrous ( Fig. 1E View FIGURE 1 ). Epicnemial carina distinct, reaching anterior margin of mesopleuron ( Fig. 1E View FIGURE 1 ). Propodeum faintly rugose antero-laterally, 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. 2A View FIGURE 2 ); spiracles elongate, elliptical, connected with pleural carina ( Fig. 2B View FIGURE 2 ). Metapleuron smooth, setose, glabrous medially, with a few short longitudinal rugae ventrally, juxtacoxal carina interrupted medially ( Fig. 1E View FIGURE 1 ). Fore wing 3.1 × as long as wide. Fore wing vein 1cu-a postfurcal ( Fig. 2E View FIGURE 2 ). Hind femur 2.8 × as long as its maximum width in lateral view. Hind tibia 3.7 × as long as its maximum width. Ratio of length of hind tarsomeres 1–5, 4.5: 1.5: 1.3: 1.0: 1.4.

Metasoma. Metasoma coarsely and densely punctate-rugose ( Figs 2C, D View FIGURE 2 ). First metasomal tergite smooth anterior half, rugose posterior half, 0.9 × as long as apical width, with distinct dorso-lateral, ventro-lateral and pair of latero-median carinae ( Figs 2B–D View FIGURE 2 ). Second metasomal tergite 0.6 × as long as its apical width, with distinct dorso-lateral carina till spiracle and latero-median carinae distinct at anterior half ( Figs 2B–D View FIGURE 2 ). Third metasomal tergite 0.6 × as long as its apical width, with midlongitudinal carinae distinct basally ( Fig. 2D View FIGURE 2 ). Ovipositor sheath setose apically ( Fig. 2C View FIGURE 2 ).

Color. Body black; scape ventrally, face except medially, clypeus postero-laterally, maxillary and labial palps, frons laterally, tegula, all femora basally and apically, all tibia basally, and tibial spur yellow; mandible subapically, antennal flagellomere, fore femur except apically, wing veins, ovipositor and ovipositor sheath brown.

Male. Same as female except 34 flagellomeres, scuto-scutellar groove widely crenulate medially and laterally.

Distribution. India and Thailand.

Biology. Unknown.

Etymology. APR dedicates this species to his friend Ms Amritha Jaiprekash Kurup, for her outstanding support and encouragements, and especially her strong desire to start taxonomic research.

Comparative diagnosis. The new species, C. amrithae is comes close to C. aizanensis described from Japan based on the color of the head. Apart from the differences cited in the key the new species differs from C. aizanensis by having the following differences; mid coxa black (yellow in C. aizanensis ), mid femur black with yellow apex (yellow in C. aizanensis ), and propodeal spiracle long, elliptic (small and oval in C. aizanensis ).