Alaptus santetrapsi Triapitsyn

Serguei V. Triapitsyn, 2017, Revision of Alaptus (Hymenoptera: Mymaridae) in the Holarctic region, with taxonomic notes on some extralimital species, Zootaxa 4279 (1), pp. 1-92 : 65-66

Alaptus santetrapsi Triapitsyn , sp. n.

( Figs 134–141 )

Type material. Holotype female [ ZIN] on slide ( Fig. 138 ) labeled: 1. “ RUSSIA : Primorskiy Kray Ussuriysk District, Gorno-tayozhnoye , 2000 m, 43.66°N 132.25°E, 1–10.viii.2000 M. V. Michailovskaya, MT”, 2. “ Mounted at UCR /ERM by V. V. Berezovskiy 2007 in Canada balsam ”; 3. [magenta] “ Alaptus santetrapsi Triapitsyn HOLOTYPE ♀ ”; 4. “ Det. by S. V. Triapitsyn 2007”. The holotype ( Fig. 134 ) is complete, with the wings detached and mounted under a separate coverslip . Paratypes: CANADA: ALBERTA, Banff National Park , Saskatchewan River Crossing, L.S. Skaley (“ Duff layer around C [ronartium]. comandrae infected Pinus contorta ”, remounted at UCRC on individual slides from 2 almost dry slides in Hoyer’s medium) : 16.i.1971 [4 ♀, 1 ♂, CNC; 1 ♀, 1 ♂, UCRC]; 16.ii.1971 [5 ♀, 3 ♂, CNC]. ONTARIO, Ottawa, West Carleton-March Ward, Constance Bay , 20.vii.1973, G.A.P. Gibson [1 ♀ on slide, CNC] . YUKON (at Northwest Territories border), Dempster Hwy., Richardson Mts. , 18.viii.1984, S. & J. Peck (tundra) [1 ♀ on slide, CNC] . RUSSIA: PRIMORSKIY KRAY, Ussuriyskiy rayon, Gornotayozhnoye (18 km SE of Ussuriysk), 25–26.ix.1999, M.V. Michailovskaya, YPT [1 ♀ on slide, UCRC] .

Material examined (non-type). CANADA: ALBERTA: Banff National Park , Saskatchewan River Crossing , L.S. Skaley (“ Duff layer around C [ronartium]. comandrae infected Pinus contorta ”): 8.i.1971 [3 ♀, 3 ♂, CNC] ; 16.i.1971 [2 ♀, 2 ♂, CNC]; 8.ii.1971 [1 ♂, CNC]. Seebe, L.S. Skaley (“Duff layer around C [ronartium]. comandrae infected Pinus contorta ”): 4.i.1971 [3 ♀, 1 ♂, CNC]; 28.i.1971 [10 ♀, 4 ♂, CNC]; 8.ii.1971 [2 ♀, 1 ♂, and incomplete 1 specimen of unknown sex, CNC]; 25.ii.1971 [5 ♀, 1 ♂, CNC]. These specimens are all poorly mounted, on 9 slides, in a partially dry Hoyer’s medium and thus require proper re-mediation into Canada balsam.

Description. FEMALE (holotype). Body ( Fig. 134 ) dark brown except mesosoma a little lighter (particularly laterally); appendages light brown to brown.

Antenna ( Fig. 136 ) as long as body; scape (including radicle) 5.0× as long as wide, almost smooth; F1 as long as pedicel and about as long as F4, F2 the longest funicle segment and about 7× as long as wide, F3 shorter than F2 and slightly longer than F4, F5 the shortest and widest funicle segment; clava 4.4× as long as wide, apparently with 4 mps, almost as long as combined length of F3–F5.

Fore wing ( Fig. 137 ) 10.2× as long as wide; disc slightly infumate and bare except the admarginal rows; longest marginal seta 4.4× maximum wing width. Hind wing ( Fig. 137 ) about 19× as long as wide; disc more strongly infumate, with 1 row of setae closer to posterior margin; longest marginal seta 6.8× maximum wing width.

Ovipositor ( Fig. 134 ) markedly exserted beyond apex of gaster (by 0.33× its own total length), occupying about 0.6× its length, and 1.3× length of metatibia.

Measurements of the holotype (µm). Body 515; head 109; mesosoma 188; gaster 242; ovipositor 218. Antenna: scape (including radicle) 90; pedicel 45; F1 45; F2 64; F3 48; F4 44; F5 39; clava 133. Fore wing 488:48; longest marginal seta 212. Hind wing 484:25; longest marginal seta 170.

Variation. Paratype from the Far Fast of Russia: body length 455 µm; antenna a little longer than body; scape (including radicle) 4.7× as long as wide; clava 4.0× as long as wide; fore wing 10.8× as long as wide, longest marginal seta 4.8× maximum wing width; hind wing about 20× as long as wide. Paratypes from Canada ( Fig. 135 ): body length 515–605 µm; antenna a little shorter than body, scape (including radicle) 4.4–5.4× as long as wide; clava 4.9–5.4× as long as wide and a little shorter than combined length of F3–F5; fore wing 10.1–10.5× as long as wide, longest marginal seta 3.8–4.3× maximum wing width; hind wing 20–21× as long as wide, longest marginal seta 7.0–7.5× maximum wing width; ovipositor exserted beyond apex of gaster by 0.31–0.35× its own total length, 1.3–1.4× length of metatibia.

MALE (paratypes from Canada, Fig. 139 ). Body length 555–575 µm. Similar to female except for normal sexually dimorphic features and the following. Antenna ( Fig. 141 ) with scape 3.7–4.3× as long as wide, Fl about as long as pedicel, F2 longer than F1. Fore wing 10.0–11.0× as long as wide. Genitalia ( Fig. 140 ) length 106–121 µm.

Diagnosis. This species differs from A. antennatus , to which it is most similar, and all other species of the genus with a bare disc of the fore wing (except for the admarginal rows of setae) in having a relatively long ovipositor (1.3–1.4× length of metatibia) which is markedly exserted beyond the gastral apex (by about one-third of its own total length).

Etymology. The species is named after Sante Traps (www.santetraps.com), the manufacturer of excellent Malaise traps, one of which was used to capture the holotype of this new taxon.

Hosts. Unknown.

Comments. There is hardly any doubt about conspecificity of the specimens from Canada with those from the Russian Far East; the former seem to be somewhat larger on average but that might be due in part to a possible effect of the different slide-mounting techniques (like flattening of the gaster in the initial water-soluble medium if the coverslip had been pressed).

Figures

FIGURES 134 – 138. Alaptus santetrapsi sp. n. ♀ (134, 136 – 138 — holotype; 135 — paratype, Saskatchewan River Crossing, Banff National Park, Alberta, Canada). 134, body, antennae and legs; 135, habitus; 136, antenna; 137, fore and hind wings; 138, slide.

FIGURES 139 – 141. Alaptus santetrapsi sp. n. ♂ (paratype, Saskatchewan River Crossing, Banff National Park, Alberta, Canada). 139, habitus; 140, genitalia; 141, antenna.