Neostethynium americanum Huber, 2020

Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2020, Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico, Zootaxa 4773 (3), pp. 1-411 : 256

publication ID

https://doi.org/ 10.11646/zootaxa.4773.1.1

publication LSID

lsid:zoobank.org:pub:B1D8D67C-4FDC-477E-872F-E8BCD4D027FB

DOI

https://doi.org/10.5281/zenodo.3844752

persistent identifier

https://treatment.plazi.org/id/038A0765-FF29-B98F-48D5-FF31885BF9F4

treatment provided by

Plazi

scientific name

Neostethynium americanum Huber
status

sp. nov.

Neostethynium americanum Huber , sp. n.

( Figs 659–676 View FIGURE 659 View FIGURES 660–664 View FIGURES 665–667 View FIGURES 668–671 View FIGURES 672–676 )

Type material. Holotype ♀ ( CNC), dissected under 4 coverslips on slide ( Fig. 670 View FIGURES 668–671 ) labelled: 1. “ Holotype Neostethynium americanum Huber ♀ dorsal”. 2. “ USA: SC, Pickens Co., Clemson , Cherry’s Crossing, 250m, 26.v- 29.vi.1987, oak woodland along lake shore, FIT”.

Paratypes. 97 ♀, 1 ♂. USA. GA: Clarke Co., Athens , Oconee Forest Park, 11-12.vii.1987, G. Gibson (1 ♀, CNC) . SC: same data as holotype (45 ♀, 1 ♂, CNC, NHMUK, UCRC, USNM) , same data as holotype but 5.vi- 7.vii.1987 (42 ♀, CNC, NHMUK, UCRC) , same data as holotype but 8-20.vii.1987 (1 ♀, CNC) . VA: Wa rr en Co. , Shenandoah Nat. Park, Compton Gap, 800m, vii- 23.viii.1987, MT, CNC Hym. Team (1 ♀, CNC) .

Diagnosis. Neostethynium americanum is distinguished from N. stenopterum (Ogloblin) , the only other described Neostethynium species, by the following combination: scutellar seta much closer to lateral margin of scutellum than to campaniform sensillum ( Fig. 666 View FIGURES 665–667 ) (midway between in N. stenopterum ); mandible short, but still longer than its basal width ( Fig. 662 View FIGURES 660–664 ) (shorter in N. stenopterum , the mandible rudimentary); fu 2 and fu 6 relatively longer than wide ( Fig. 665 View FIGURES 665–667 ) (relatively shorter in N. stenopterum ). Male with dorsal tooth an apically rounded and serrate lobe distinctly different from the 2 ventral teeth ( Fig. 672 View FIGURES 672–676 ) (dorsal tooth same as 2 ventral teeth in N. stenopterum ).

Description. Female. Body length 455–605 (n=10), 564–626 (n=3, slide mounts). Colour. Body light brown except base of ovipositor dark reddish brown or almost black; eye and ocelli reddish; scape and pedicel yellow, flagellum brown; legs except apical tarsomeres yellowish except femora and tibiae with light brown areas; wings almost uniformly hyaline ( Fig. 664 View FIGURES 660–664 ). Head width (n=5, including holotype) 171–186. Mandibles short but distinct, when closed their apices not meeting medially ( Fig. 660, 661 View FIGURES 660–664 ). Antenna. Funicle segments without mps, claval segments each with 1 mps, apex of clava with short, indistinct nipple ( Fig. 665 View FIGURES 665–667 ); length/width measurements (ratios) (n=5) are: scape 48–62/18–21 (2.37–3.21), pedicel 40–42/20 (2.00–2.10), fu 1 25–29/9–11 (2.37–3.04), fu 2 39– 42/10–12 (3.33–3.92), fu 3 33–38/10–11 (3.07–3.69), fu 4 35–36/11–12 (3.03–3.26), fu 5 30–34/10–12 (2.71–3.00), fu 6 28–33/12–14 (2.06–2.48), clava 88–104/20–25 (3.79–5.29). Wings. Fore wing with two uneven longitudinal rows of microtrichia beginning well beyond apex of venation and a few behind apex of venation; hind wing without median rows of microtrichia ( Fig. 664 View FIGURES 660–664 ). Fore wing length (n=7) 553–586, width 64–70, length/width 8.16–8.88, longest marginal setae 126–151; hind wing length 550–579, width 17–30, longest marginal setae 82–107. Ovipositor length 154–166 (n=6), 0.71–0.80× as long as metatibia length (202–228).

Male. Similar to female except for head and antenna ( Fig. 674 View FIGURES 672–676 ). Head width 189 (n=1); mandibles large, their apices crossing each other medially, with 3 teeth, the two ventral ones pointed and equal in size, the dorsal tooth a rounded finely serrate lobe ( Figs 672, 673 View FIGURES 672–676 ). Antenna. fl 1 and fl 2 apparently each with 2 mps, fl 3 –fl 10 apparently each with 3 or 4 mps, fl 11 apparently with 1 mps (difficult to see any of them); length/width measurements (ratios) (n=1) are: scape 62/22 (2.77), pedicel 40/23 (1.75), fl 1 30/16 (1.87), fl 2 27/16 (1.72), fl 3 33/17 (1.95), fl 4 34/19 (1.83), fl 5 34/18 (1.89), fl 6 36/20 (1.75), fl 7 34/18 (1.83), fl 8 36–18 (1.93), fl 9 36/20 (1.78), fl 10 36/16 (2.17), fl 11 37/16 (2.24). Genitalia as in Fig. 676 View FIGURES 672–676 .

Derivation of species name. The species is named after the country it occurs in ( USA, commonly referred to as America).

Distribution. USA: GA, SC, VA.

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes

NHMUK

Natural History Museum, London

UCRC

University of California, Riverside

USNM

Smithsonian Institution, National Museum of Natural History

MT

Mus. Tinro, Vladyvostok

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Mymaridae

Genus

Neostethynium

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