Apsilops japonicus Yoshida, Nagasaki & Hirayama, 2011, sp. nov.
Creators: name: Yoshida, Takuma
name: Nagasaki, Osamu
name: Hirayama, Tomoko
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Apsilops
Apsilops japonicus

description: Apsilops japonicus sp. nov.
Figs 1 –28
(Additional images are available at “Checklist of Japanese Ichneumonidae ” by Kazuhiko Konishi: http://cse.naro.affrc.go.jp/ konishi/mokuroku/ apsilops.html)
Type series. Holotype. Ƥ. “Kogaki, Sanda-shi, Hyôgo-ken, Japan, on Nuphar subintegerrimum, coll. 12.ix.2009 (pupa), em. 27.ix.2009, O. Nagasaki & T. Hirayama leg. ” (35˚59ˊN, 135˚16ˊE) (SEHU).
Paratypes. Japan. Shimokume, Katô-shi, Hyôgo-ken, on Nuphar subintegerrimum, 23 (7.vii.1996), 2Ƥ (5.viii.1996), 2Ƥ (12.viii.1996), 1Ƥ13 (18.viii.1996), O. Nagasaki (SEHU); Kôzuki, Sanda-shi, Hyôgo-ken, on Nuphar japonicum, 13 (29.vi.2006), O. Nagasaki (SEHU); Kogaki (35˚59ˊN, 135˚16ˊE), Sanda-shi, Hyôgo-ken, on Nuphar subintegerrimum, 2Ƥ (11.v.2009), 3Ƥ (19.v.2009), 1Ƥ (13.vi.2009), 5Ƥ (5.viii.2009), 3Ƥ13 (11.viii.2009), 3Ƥ13 (17.viii.2009), 4Ƥ13 (25.viii.2009), 4Ƥ (29.viii.2009), O. Nagasaki & T. Hirayama (AEKC); Same locality, coll. 12.ix.2009 (pupa), 13 (em. 17.ix.2009, BMNH), 2Ƥ (em. 19.ix.2009, BMNH), 2Ƥ (em. 23.ix.2009, MNHN), 1Ƥ13 (em. 24.ix.2009, CNCI), 1Ƥ (em. 25.ix.2009, CNCI), 1Ƥ (em. 28.ix.2009, AEKC), 1Ƥ (em. 30.ix.2009, AEKC), O. Nagasaki & T. Hirayama; same locality, 2Ƥ23 (18.ix.2010), T. Yoshida & O. Nagasaki (SEHU).
Ƥ. Body densely covered with short setae. Head 1.8–2.0 times as wide as long in dorsal view (Fig. 5). OOL/ POL=1.1–1.4. Frons, vertex, gena densly punctulate. Antennal scrobe glabrous. Face 1.9–2.3 times as wide as high. Face and clypeus densely punctulate to punctulate-reticulate. Eyes weakly divergent ventrally (Fig 3). Malar space 0.8–0.9 times as wide as mandibular width. Antenna with 22–24 flagellomeres; 1st flagellomere 2.4–3.0 times as long as apical width; 2nd flagellomere 3.4–3.8 times as long as apical width and 1.3–1.6 times as long as 1st (Fig. 7).
Pronotum punctulate-reticulate. Epomia weak, not crossing pronotum vertically upwards. Mesoscutum and scutellum densely punctulate. Notaulus narrow but deep and distinct, extending beyond center of mesoscutum. Lateral carina of scutellum absent. Mesopleuron densely punctulate; punctures larger and punctulate-reticulate in postero-ventral part below speculum; punctures sparser in speculum. Sternaulus reaching half way of mesopleuron, represented as wide shallow depression. Metapleuron rugulose. Juxtacoxal carina vestigial. Propodeum moderately convex above, punctulate-reticulate; second lateral area rugulose; area petiolaris and area posteroexterna confluent, rugulose; area superomedia areolate-rugulose. Anterior transverse carina weak. Area superomedia hexagonal, usually longer than wide (Fig. 9) but sometimes wider (Fig. 10), costula inserted before middle.
Hind femur 3.5–4.1 times as long as median width. Hind tibia 7.8–8.9 times as long as apical width. Fifth tarsomeres weakly curved and with large claws. Fifth tarsomere of middle leg 0.7–0.8 times as long as 2nd–4th tarsomeres combined. Fifth tarsomere of hind leg 0.5 times as long as 2nd–4th tarsomeres combined.
Fore wing about 5.0– 7.5 mm long. Sides of areolet subparallel (Fig. 14). Nervellar index 0.6–1.0.
First metasomal segment 1.6–2.0 times as long as maximum width (Fig. 11); spiracle situated behind middle; median dorsal carina weak, distinct only 1/2 of length before spiracle; petiole shallowly punctate; area between median and dorsolateral carinae covered with longitudinally elongate punctures; lateral face below dorsolateral carina covered with vertical rugae (Fig. 12); postpetiole polished and with some small punctures; ventral face with transverse rugae (Fig. 13). Second tergum 0.7–0.8 times as long as apical width. Second and following terga densely punctulate. Each metasomal sternite medially weakly sclerotized, with strongly sclerotized spot on each side (Fig. 15). Ovipositor sheath moderately long (Fig. 16), 1.0–1.1 times as long as hind tibia.
Black (Figs 1–2). Setae brown on face and propodeum, blackish on mesoscutum. Mouth parts dark brown to black. Wings hyaline, slightly tinged with black. Veins dark brown to black. Seventh metasomal tergum with white spot. Ovipositor red.
3. Similar to female except as follows. OOL/POL=1.0–1.4. Face 1.6–1.8 times as wide as high. Malar space 0.5–0.7 times as long as basal width of mandible. Antenna with 24–25 flagellomeres, with fine linear tyloids on outer face of 8th–16th flagellomeres. Area superomedia sometimes with open anterior edge (Fig. 19). Hind femur 4.3–4.6 times as long as median width. Hind tibia 8.0–9.8 times as long as apical width. Fifth tarsomere of middle tarsus 0.5 times as long as 2nd–4th tarsomeres combined. Fifth tarsomere hind tarsus 0.3–0.4 times as long as 2nd– 4th tarsomeres combined. First metasomal segment 2.1 times as long as apical width (Fig. 20). Second metasomal segment 1.0–1.1 times as long as apical width (Fig. 21). Punctures on terga are larger than in female; punctures denser anteriorly; punctulate-reticulate and forming longitudinal lines on anterior half on 2nd tergum (Fig. 21). Each of 2nd to 5th metasomal sternites divided in 5 places, but 6th and 7th sternites undivided (Fig. 17). Subgenital plate transverse, with posterior margin convex (Fig. 25). Apex of aedeagus strongly bent (Figs 26). Apical margin of gonosquama round (Fig. 27). Fore femur black, partly brown apically. Fore tibia brown with black band on dorsal face and with white basal annulus. Fore tarsus brown to dark brown (Fig. 22). Middle tibia with white annulus on dorsal face (Fig. 23). Hind tibia with white basal annulus (Fig. 24). Usually 1st–4th tarsomeres of middle and hind legs with white basal annulus (Figs 23, 24).
Distribution. Japan (Honshû).
Biology. Neoschoenobia testacealis (Lepidoptera: Crambidae) boring in the leaf petiole of the yellow water lily, Nuphar subintegerrium (Nymphaeaceae). As mentioned in the introduction, the existence of this species on the host had already been reported by Nagasaki (1992, 2004). Females walk down the petiole of the plant and oviposition takes place underwater. This species is a solitary idiobiont ectoparasitoid on larvae and pupae (Nagasaki et al. in prep.). One of the collecting sites is shown in Figure 28.
Remarks. This species is easily distinguished from the other species of the genus by having mostly black legs. The legs of A. japonicus are black except for some brown bands and white stripes or annuli of the male (Figs 22– 24), whereas legs of the other species are mostly brown to reddish brown with limited black areas. The scutellum of A. japonicus is never tinged with white, but the other species often have white mark on the scutellum. Also the relative length of ovipositor to the hind tibia can be used to discriminate this species from the others. The ovipositor sheath is as long as the hind tibia in A. japonicus, but it is longer than the hind tibia in a North American species, A. sericata, and shorter in the other species.
description: Published as part of Yoshida, Takuma, Nagasaki, Osamu & Hirayama, Tomoko, 2011, A new species of the genus Apsilops Förster (Hymenoptera: Ichneumonidae: Cryptinae) from Japan; parasitoid of an aquatic crambid moth, pp. 41-50 in Zootaxa 2916 on pages 43-46, DOI: 10.5281/zenodo.206662