Xanthopimpla sylvicola, Watanabe & Matsumoto, 2021

Watanabe, Kyohei & Matsumoto, Rikio, 2021, Revision of the genus Xanthopimpla Saussure, 1892 (Hymenoptera, Ichneumonidae, Pimplinae) from Japan, Deutsche Entomologische Zeitschrift 68 (2), pp. 269-297 : 269

publication ID	https://dx.doi.org/10.3897/dez.68.69768
publication LSID	lsid:zoobank.org:pub:7E2958A3-5E87-4218-8689-F9D2C98A0E24
persistent identifier	https://treatment.plazi.org/id/BC28E590-921E-4B0D-8F38-ED046A7DC3B7
taxon LSID	lsid:zoobank.org:act:BC28E590-921E-4B0D-8F38-ED046A7DC3B7
treatment provided by	Deutsche Entomologische Zeitschrift by Pensoft
scientific name	Xanthopimpla sylvicola
status	sp. nov.

Treatment

Xanthopimpla sylvicola sp. nov.

Figs 2F View Figure 2 , 3F, L View Figure 3 , 4L View Figure 4 , 5M, Q View Figure 5 , 6B, G View Figure 6

Xanthopimpla sp. E: Watanabe, 2011: 18.

Type series.

Holotype: F, Japan, Kagoshima Pref., Amamioshima Is., Yamato Vil., Oodana, 29 Jun 2011, K. Watanabe leg. ( KPMNH). Paratypes: Japan: [Honshu] 1 F, Mie Pref., Inabe Daian, Ishigureminami, Ugakei, 9 Jul 2017, S. Ohkusa leg. ( KPMNH); 1 F, Toyama Pref., Toyama City, Kamegai, 21-28 Jul 2009, M. Watanabe et al. leg. (MT) ( KPMNH). [Kyushu] 1 F, Miyazaki Pref., Kobayashi City, Inokodani, 4 May 2003, R. Matsumoto leg. ( OMNH); 1 F, Kagoshima Pref., Kirishimayama, 8 Dec 1975, K. Ohara leg. ( SEHU). [Ryukyu Isls.] 1 F, Kagoshima Pref., Amamioshima Is., Mt. Yui-dake, 27 Jul 2004, H. Makihara leg. (MT) ( KPMNH); 1 F, ditto, 19 Sep 2004 ( OMNH); 1 F, Kagoshima Pref., Amamioshima Is., Nase, Chuo-rindo, 26-28 Jun 2011, K. Watanabe leg. ( KPMNH).

Comparative diagnosis.

This species belongs to the terebatrix species group sensu Townes and Chiu (1970). This species resembles X. brevicauda brevicauda in the density of punctures on mesoscutum, the shape of lateral carinae of scutellum, the shape of area superomedia of propodeum and the colouration, but it can be distinguished by the ovipositor sheath 0.5-0.55 × length of hind tibia (0.37 × length of hind tibia in X. brevicauda brevicauda ) and the propodeum with a pair of black spots (without the spots in X. brevicauda brevicauda ).

Description.

Female (n = 7). Body covered with silver setae, except for some dark brown setae on mesoscutum, polished, largely smooth, length 7.8-9.4 (HT: 9.2) mm.

Head 0.54-0.56 (HT: 0.56) × length of width. Clypeus almost flat in lateral view, sparsely punctate, except for ventral margin, 0.56-0.59 (HT: 0.56) × length of maximum width. Face 0.91-0.95 (HT: 0.91) × length of maximum width, densely punctate. Frons with a slight convexity medially. Length of malar space 0.2-0.25 (HT: 0.2) × length of basal mandibular width. OD: POL: OOL = 1.0: 0.7-0.8 (HT: 0.8): 0.55-0.6 (HT: 0.6). Antenna longer than fore wing. Flagellum with 33-35 (HT: 35) flagellomeres. Length of FL I 3.3-3.6 (HT: 0.3) × length of maximum depth in lateral view, 1.43 × length of F II.

Mesosoma. Epomia very short. Front end of notaulus with a sharp-edged transverse crest. Notauli not reaching past centre of mesoscutum, their posterior ends not joined with each other. Mesoscutum sparsely and finely punctate, its anterior end protruded anteriorly. Scutellum sparsely and finely punctate, roundly convex, with a lateral carina that reaches apex (Fig. 3L View Figure 3 ). Mesopleuron sparsely punctate dorsally, densely punctate ventrally. Posterior transverse carina of mesosternum with a roundly produced lamella, with a shallow median notch. Metapleuron smooth. Propodeum smooth, except for area spiracularis and area lateralis covered with sparse and fine punctures, with lateral section of anterior transverse carina, anterior and middle sections of lateromedian longitudinal carina, lateral longitudinal carina and pleural carina, without hill-like swelling (Fig. 4L View Figure 4 ). Anterior end of lateral longitudinal carina extending 0.3-0.4 (HT: 0.3) length of outer side of area spiracularis in dorsal view (Fig. 4L View Figure 4 ). Anterior part of pleural carina partly indistinct. Middle section of lateromedian longitudinal carina usually (including HT) absent (Fig. 4L View Figure 4 ). Middle section of posterior transverse carina weak and sometimes narrowly indistinct (Fig. 4L View Figure 4 ). Fore wing length 6.3-8.0 (HT: 7.6) mm. Areolet present, receiving vein 2m-cu near middle. Hind femur 2.4-2.5 (HT: 2.4) × length of maximum depth in lateral view. Pre-apical bristles of mid-tibia 2-3 (HT: 3) and of hind tibia 2-3 (HT: 2) (Fig. 5M View Figure 5 ). Apical bristle of mid-tibia 2-3 (HT: 3) and of hind tibia 1-3 (HT: 3) (Fig. 5M View Figure 5 ). Ratio of length of hind first to fifth tarsomeres 1.7: 1.0: 1.0: 0.7: 2.05-2.2 (HT: 2.2). Largest bristle on hind tarsal claws distinctly widened next to apex, with a mucronate apex (Fig. 5Q View Figure 5 ).

Metasoma. T I 1.0-1.1 (HT: 1.1) × length of maximum width, largely smooth, with a weak transverse depression subapically (Fig. 6B View Figure 6 ). Latero-median carina of T I complete, except for apical part obscured (Fig. 6B View Figure 6 ). Dorso-lateral carina of T I absent, except for base. T II 0.55 × length of maximum width, sparsely punctate. T II to T VI with a posterior transverse foveolate groove. T III to T VIII densely punctate. Ovipositor sheath 0.5-0.55 (HT: 0.55) times as long as hind tibia. Upper valve of ovipositor strongly narrowed near apex with dorsal minute teeth apically (Fig. 6G View Figure 6 ). Lower valve of ovipositor with 9-10 (HT: 10) distinct teeth (Fig. 6G View Figure 6 ). Ovipositor weakly downcurved.

Colouration (Figs 2F View Figure 2 , 3F View Figure 3 , 4L View Figure 4 , 5M View Figure 5 ). Body (excluding wings) yellow. Apex of mandible and ocellar area black, the latter black area weakly expanded outside of ocellar area. Occiput with a median darkened area. Antenna reddish-yellow, except for a yellow area of scape. Mesoscutum with a transverse black band anteriorly and a black spot in front of scutellum, the antero-median area of the band partly tinged with reddish-brown. Propodeum with a pair of semicircular black spots on combined areas externa and lateralis. Wings hyaline. Veins and pterostigma blackish-brown to brown, except for yellowish-brown wing base and base of pterostigma. Hind trochanter with a pair of small black spots. Apex and base of hind tibia tinged with black. Base of first tarsomere and apical part of fifth tarsomere of hind leg sometimes darkened. Widened part of longest bristle on hind tarsal claws darkened. T I, III, V and VII with a pair of black spots. T II sometimes (including HT) with a pair of small black spots. Ovipositor dark reddish-brown. Ovipositor sheath black.

Male. Unknown.

Distribution.

Japan (Honshu, Kyushu and Amamioshima Is.).

Bionomics.

In Japan, adults were collected from May to July, October and December. The authors collected this species along a path inside the broad-leaved forest in Kyushu and Amamioshima Is. Host is unknown.

Etymology.

The species name is from Latin " silva " + " colo ", which is based on the habitat of this species.