Phymatocera fuscata ( Togashi, 1984 ), 2025

Phymatocera fuscata ( Togashi, 1984) , comb. nov.

( Figs 8C View FIGURE 8 , 9E, I, N View FIGURE 9 , 10A, C, E, F View FIGURE 10 , 17 View FIGURE 17 )

Rhadinoceraea fuscata Togashi, 1984: 378 ; Abe & Togashi 1989: 555; Taeger et al. 2010: 348; Naito 2019: 63; Naito 2020: 363.

Additional description: Female and male. Length 6.5 mm in female ( Fig. 17A, B View FIGURE 17 ), 4.5 mm in male ( Fig. 17C, D View FIGURE 17 ). Setae on body, antenna and legs whitish; setae on apical flagellomeres yellowish. OOL:POL 1.6:1.0 in female, 1.4:1.0 in male. Postocellar area with lateral furrow punctiform. Interocellar furrow shallow. Distance between eyes at anterior tentorial pit 1.2 × height of eye. Frontal area without lateral ridge ( Fig. 10A View FIGURE 10 ). Malar space breadth 0.3–0.4 × median ocellus width. Antenna filiform ( Figs 10E, F View FIGURE 10 , 17A, C, D View FIGURE 17 ). In female, antenna length 1.8 × head width; flagellum relatively thick, with setae somewhat shorter than 1/2 middle width of flagellomere 1 ( Fig. 9E View FIGURE 9 ), and slanted toward apex of antenna, but setae on ventral side of flagellum 7 erect; basal and middle flagellomeres apically slightly expanded; flagellomere 1 with dorsal length 0.81 × height of eye, 3.2 × apical breadth in lateral view; flagellomere 2 dorsal length 0.71 × flagellomere 1 dorsal length ( Fig. 10E View FIGURE 10 ); flagellomere 7 with length 1.9 × breadth in lateral view. In male, antenna length 2.1 × head width; flagellum slightly compressed, with setae very short, about as long as 1/3 middle width of flagellomere 1, and erect or slightly slanted toward apex of antenna ( Fig. 9I View FIGURE 9 ); basal and middle flagellomeres apically slightly expanded; flagellomere 1 with dorsal length 0.90 × height of eye, 2.8 × apical breadth in lateral view ( Fig. 10F View FIGURE 10 ); flagellomere 2 dorsal length 0.87 × flagellomere 1 dorsal length; flagellomere 7 with length 2.2 × breadth in lateral view.

Mesoscutum and mesoscutellum covered with setae, but not very densely. Metascutellum glabrous, laterally sparsely with setae. Epicnemium covered with setae, slightly raised, with epicnemial groove shallow and not very distinct ( Fig. 10C View FIGURE 10 ). Mesepisternum glabrous on wide ventrolateral part. Furrow dividing katepimeron into anterior and posterior parts distinct. Hind tarsus with length of plantar lobe of tarsomere 1 about 0.3 × distance between plantar lobes of tarsomeres 1 and 2 in female and male. Tarsal claws with inner tooth small in female ( Fig. 17F View FIGURE 17 ), very small in male ( Fig. 17G View FIGURE 17 ). In fore wing, proximal part of vein 2A+3A bifurcated, with anterior branch separated from vein 1A in female ( Fig. 17H View FIGURE 17 ), but simple, almost straight and not bifurcated in male ( Fig. 17I View FIGURE 17 ); cell 2Rs slightly shorter than cells 1R1 and 1Rs combined in posterior length ( Fig. 17A, C View FIGURE 17 ); junction of vein Rs and crossvein 2r-rs far separated proximally from junction of vein Rs and crossvein 3r-m.

Abdomen slightly shiny and distinctly microsculptured in female, rather shiny and slightly microsculptured in male. In female abdomen, ovipositor sheath 0.74 × as long as hind tibia; valvula 3 slightly extending beyond tergum 10 posteriorly ( Fig. 17J View FIGURE 17 ). Lancet with ctenidia extending to serrulae and serrulae separated from each other and each angularly convex and without tubercle (fig. 9 in Togashi, 1984). Male genitalia ( Fig. 17K View FIGURE 17 ; fig. 10 in Togashi, 1984) with parapenis triangular, mostly membranous, narrowly sclerotized on basal and lateral margins; digitus of volsella nearly straight (fig. 10 in Togashi, 1984). In penis valve (fig. 11 in Togashi, 1984), valviceps longer than valvura, with apex widely rounded, dorsal edge markedly roundly convex on apical half and ventral edge straight.

Material examined. Type material of Rhadinoceraea fuscata Togashi, 1984 : Holotype: ♀, with three labels, “ Mt. Shironuki , Ishikawa Pref., May 18, 1980, I. TOGASHI”, “ Rhadinoceraea fuscata Togashi sp. nov., det. Togashi, 1983” and “Typus” ( Figs 8C View FIGURE 8 , 9E View FIGURE 9 , 10A, C, E View FIGURE 10 , 17A, B, F, H, J View FIGURE 17 ) (ovipositor missing) ( KU). --- Paratype: 1♂, with the same data label as the holotype and “ Rhadinoceraea fuscata n. sp., det. Togashi, 1983” and “[ Paratype (in Japanese )]” ( Figs 9I, N View FIGURE 9 , 10F View FIGURE 10 , 17C, D, E, G, I, K View FIGURE 17 ) (penis valve missing) ( KU) .

Distribution. Japan: Honshu ( Togashi, 1984).

Host plant. Unknown.

Remarks. This species is distinguished from the other East Palearctic species of the P. fumipennis group, P. peregrinator comb. nov., by having the following characters, in addition to the characters mentioned in the key: Distance between eyes at anterior tentorial pit 1.2 × height of eye (1.3–1.4 × in P. peregrinator ); length of antenna 1.8 × width of head in female, 2.1 × in male (2.1–2.4 × in female, 2.7–3.2 × in male in P. peregrinator ); dorsal length of flagellomere 2 0.71 × that length of flagellomere 1 in female, 0.87 × in male (0.98–1.1 × in female, 1.1–1.2 × in male in P. peregrinator ).

In the keys to Nearctic Phymatocera species by Smith (1969) and Goulet (1981), this species goes to the couplets leading to P. rusculla MacGillivray, 1923 and P. similata MacGillivray, 1908 , but differs from them in having flagellomere 2 clearly shorter than flagellomere 1 ( Fig. 10E, F View FIGURE 10 ) (flagellomere 2 subequal to or longer than flagellomere 1 in the latter two; Smith 1969, fig. 45) and the serrulae of the lancet closer together (fig. 9 in Togashi, 1984) (the serrulae farther apart in the latter two; see figs 143, 144 in Smith, 1969).

Togashi (1984) placed this species in Rhadinoceraea , and described “mesopleuron without prepectus (= epicnemium)”. However, in the holotype (female) and paratype (male), the epicnemium is present, although poorly developed ( Fig. 10C View FIGURE 10 ). Therefore, we transfer this species from Rhadinoceraea to Phymatocera (see also the remarks of the section of Phymatocera ).