Lagarotis nigra Watanabe, 2024, sp. nov.
Creators: name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Lagarotis
Lagarotis nigra

description: Lagarotis nigra sp. nov.   (SJN: Kuro-naga-maru-himebachi)  
(Figs. 25A–D, 39E, 40R)  
 Type series. Holotype: JAPAN, KPM-NK 91258, F, Niigata Pref., Sado Is., Sado City, Kanaishinpo to Mt. Myokenzan, 4. VIII. 2009, K. Watanabe leg. Paratypes: JAPAN, KPM-NK 91257, F, Tochigi Pref., Ohtawara City, Ryujo-park, 15. VI. 2010, E. Katayama leg.; KPM-NK 91259, F, Kanagawa Pref., Hayama Town, Nagae, Sakurayama-Oyama rindo, 27. V. 2020, I. Kawashima leg.; KPMNK 91260, F, Toyama Pref., Toyama City, Arimine, Jurodani, 11–16. VIII. 2009, M. Watanabe et al. leg. (MsT); KPM-NK 91261, F, Gifu Pref., Yoro, Ogura-dani, Akaiwa, 13. VI. 2005, S. Ohkusa leg.; KPM-NK 91262, F, Ehime Pref., Saijyo City, Nishinokawatei, Mt. Ishizuchi, Tsuchigoya, 28. VII. 2018, K. Watanabe leg.   
 Description. Female (n = 6). Body length 8.9–12.5 (HT: 8.9) mm, matt and covered with silver setae.   
Head 0.55–0.6 (HT: 0.6) × as long as wide in dorsal view. Clypeus 2.5–2.6 (HT: 2.5) × as broad as high, sparsely punctate, polished ventrally, weakly convex in lateral view, lower margin slightly concave medially or subtruncate (Fig. 40R). Face 1.7–1.8 (HT: 1.8) × as broad as high, flat in lateral view. Dorsal profile of gena as Fig. 39E. Occipital carina complete. Length of malar space 0.7–0.75 (HT: 0.75) × as long as basal width of mandible. Base of mandible flat. POL 1.0–1.25 (HT: 1.0) × as long as OD. OOL 1.4–1.8 (HT: 1.7) × as long as OD. Antenna with 38–42 (HT: 41) flagellomeres. FL I 5.0–5.7 (HT: 5.7) × as long as maximum depth, 1.9–2.0 (HT: 1.9) × as long as FL II.  
Mesosoma. Epomia absent. Mesoscutum with weak notaulus. Epicnemial carina present laterally and ventrally, its dorsal end situated near anterior margin of mesopleuron. Speculum with a smooth area (Fig. 25C). Propodeum with no carinae except for pleural carina and posterior transverse carina. Posterior transverse carina sometimes obscured partly. Lateromedian longitudinal carina sometimes weakly and partly present. Fore wing length 7.2–9.7 (HT: 7.2) mm. Areolet present, shortly petiolated, received vein 2m-cu at the outer angle (Fig. 25D). Fore wing vein 1cu-a postfurcal to vein M&RS. Nervellus subvertical, intercepted slightly posterior the middle. Tarsal claws simple. Hind femur 4.55–5.25 (HT: 5.25) × as long as maximum depth in lateral view. Ratio of length of hind first to fifth tarsomeres 4.3–4.6 (HT: 4.3): 2.0: 1.5: 0.9: 1.0–1.05 (HT: 1.05).  
Metasoma. T I 1.9–2.0 (HT: 2.0) × as long as maximum width. T II 0.85–0.9 (HT: 0.88) × as long as maximum width. Ovipositor sheath 0.2–0.25 (HT: 0.2) × as long as hind tibia.  
Colouration (Figs. 25A–D). Body (excluding wings) black. Ventral surface of flagellum fore and mid tibiae, tibial spurs, and coxae, hind tibial spurs, and ovipositor sheath partly yellowish brown. Ovipositor reddish brown to yellowish brown. Wings hyaline. Veins and pterostigma blackish brown except for dark brown wing base.  
Male. Unknown.  
 Distribution. Japan (Honshu and Shikoku).   
 Bionomics. Unknown.   
 Etymology. The specific name is from Latin “ niger ” (black). The body colour of this species is black.   
 Remarks. This species resembles Lag. beijingensis Sheng, Sun & Li, 2020 in black body colouration but can be distinguished by the antenna with 38–42 flagellomeres (52–53 × in Lag. beijingensis), the length of the malar space 0.7–0.75 × as long as the basal width of mandible (0.6 × in Lag. beijingensis), the T I 1.9–2.0 × as long as the maximum width (2.0 × in Lag. beijingensis), and the ventral surface of flagellum at least partly yellowish brown (entirely black in Lag. beijingensis).
description: Published as part of Watanabe, Kyohei, 2024, Taxonomic Study of Japanese Ctenopelmatinae (Hymenoptera, Ichneumonidae), with Descriptions of 22 New Species, pp. 39-102 in Bulletin of the Kanagawa Prefectural Museum (Natural Science) 53 on pages 76-77, DOI: 10.5281/zenodo.13237363