Anaphes (Anaphes)

Triapitsyn, S. V., 2021, Review of the genus Anaphes Haliday, 1833 (Hymenoptera: Mymaridae) in Russia, part 1: subgenus Anaphes s. str., Far Eastern Entomologist 432, pp. 1-48 : 31-33

Anaphes (Anaphes) ? nigrellus Girault, 1911

Figs 66–69

Anaphes nigrellus Girault, 1911: 282–284 .

Anaphes nigrellus Girault : Huber, 1992: 45–47 (taxonomic history, type information, descriptive notes, distribution, discussion), 75 (list), 100, 104 (illustrations).

Anaphes (Anaphes) nigrellus Girault : Huber & Thuróczy, 2018: 24 (list, type information).

MATERIAL EXAMINED. Russia: Sakhalinskaya oblast’: Kuril Islands, Shikotan

Island , inland of bukhta Gorobets [Gorobets Bay], 43°49.55’N 146°42.30’E, 18.VIII 1998

(D.J. Bennett) [1 ♀, CAS]. Sakhalin Island, near Belaya River : 2 km E of Sokol, 47°14.56’N

142°46.56’E, 24.VII 2001 (D.J. Bennett, T. R. Anderson) [1 ♀, CAS]; ca. 6 km E of Sokol ,

47°14.56’N 142°46.56’E, 16.VIII 2001 (D.J. Bennett, T. R. Anderson) [4 ♀, CAS (3),

UCRC (1)].

DIAGNOSIS. FEMALE (specimens from the Russian Far East). Body length 0.66–0.79

mm (slide-mounted specimens). Body dark brown, appendages brown except coxae dark brown. Vertex with mesh-like sculpture, mesoscutum and scutellum with faint sculpture.

Antenna ( Fig. 66 ) with scape (excluding radicle) 3.7–4.5× as long as wide, almost smooth;

metatarsus.

F2–F6 longer than pedicel, F2 3.1–3.6× as long as wide, F3 and F4 either the longest funiculars and subequal in length or, sometimes, F3 just slightly longer than F4, F2 either without

mps on one antenna and with 1 mps on the other antenna or with 1 mps on both antennae, or with 1 mps on one antenna and 2 mps on the other antenna, and F3–F6 each with 2 mps;

clava with 6 mps, 2.9–3.3× as long as wide, about as long as combined length of F5 and F6

or just barely longer. Fore wing ( Fig. 67 ) 0.75–0.79 mm long, 6.6–6.9× as long as wide;

longest marginal seta 1.1–1.2× maximum wing width; marginal space separated from medial space by 1 complete line of setae. Hind wing ( Fig. 67 ) 19–21× as long as wide; longest marginal seta 3.1–3.5× maximum wing width, disc with 1–2 irregular, short rows of setae apically. Metatarsomere 1 usually slightly shorter than metatarsomere 2 ( Fig. 69 ) but in one specimen as long as metatarsomere 2. Ovipositor ( Fig. 68 ) occupying entire length of gaster

(but not extending forward under mesosoma), not exserted beyond apex of gaster posteriorly,

and about as long as metatibia.

MALE. Known from North America only (Huber, 1992).

DISTRIBUTION.? Russia *; Canada, USA.

HOSTS. Curculionidae : Hypera spp. (in Missouri, USA) (Huber, 1992).

COMMENTS. These specimens from Sakhalinskaya oblast’ of Russia are only tentatively assigned to the Nearctic A. (Anaphes) nigrellus Girault, 1911 because genetic evidence of their conspecificity is currently lacking; it is quite possible that these in fact rather belong to an undescribed species. Females from the Russian Far East are characterized by the combination of antenna ( Fig. 66 ) bearing at least 1 mps on F2 on at least one antenna while F2–F6

are longer than pedicel. Thus they are almost identical to females of the Nearctic A. (Anaphes)

nigrellus known from Canada (Ontario) and USA (Illinois and Missouri), which are just slightly smaller individuals whose body length is at most about 0.6 mm (Huber, 1992).

Females from the eastern Palaearctic region differ from the Nearctic ones mainly by a relatively shorter clava (at most 3.3× as long as wide) and a relatively slightly longer ovipositor

(about as long as the metatibia), whereas the clava is about 3.9× as long as wide, as calculated from the measurements of the type provided in Huber (1992), and the ovipositor is about

0.9× length of the metatibia in positively identified specimens from North America (Huber,

1992). The latter difference is very minor and could be within the intraspecific variability,

which, however, is not very well known for the North American A. (Anaphes) nigrellus besides the data provided in its redescription by Huber (1992). The noted difference in the relative length to width ratio of the clava of the female antenna is potentially more significant,

and thus its variability needs to be further assessed for the specimens from the Nearctic region.

I also examined the following specimens captured by yellow pan traps at the edge of a forest near the type locality of A. (Anaphes) nigrellus which could belong either to this species or, rather, to the North American A. (Anaphes) behmani Girault, 1929 because their F2 is short and lacks mps on both antennae: USA: Illinois, Champaign County, Urbana, Brownfield

Woods, 7–8.IX 1993 (J.D. Pinto) [4 ♀, UCRC]. Their clava is 3.2–3.8× as long as wide while that of the lectotype of A. (Anaphes) behmani is almost 3.4× as long as wide, as calculated from the measurements of the lectotype provided in Huber (1992). Their fore wing length is 0.51–0.59 mm and 6.0–6.5× as long as wide, and the ovipositor is 1.1–1.2× length of the mesotibia; these more or less fit the measurements of A. (Anaphes) behmani given in

Huber (1992).

Figures

Figs 66–69. Anaphes (Anaphes)?nigrellus, female (6 km E of Sokol, Sakhalin Island, Sakhalinskaya oblast’, Russia). 66) Antenna, 67) wings, 68) ovipositor, 69) metatibia and