Neotriadomerus crassus Huber, 2017

Huber, John T., 2017, Eustochomorpha Girault, Neotriadomerus gen. n., and Proarescon gen. n. (Hymenoptera, Mymaridae), early extant lineages in evolution of the family, Journal of Hymenoptera Research 57, pp. 1-87 : 14-16

Neotriadomerus crassus Huber sp. n.

Figs 76-77 , 78-80

Type material.

Holotype female (ANIC) on slide (Fig. 80 ) labelled: 1. "Black Mountain, ACT 28-29 Mar. 1968 light trap". 2. " Neotriadomerus crassus ♀ lateral holotype".

Diagnosis.

Neotriadomerus crassus differs from the other small (body length less than 2600) species of Neotriadomerus as follows: fore wing with cubital line extending proximally to about base of parastigma (Fig. 79 ); fl1-fl8 relatively short, each at most 1.65 × as long as wide and with at least 8 mps (Fig. 78 ).

Description.

Female. Body length ≈ 1685 (holotype). Colour. Body almost uniformly dark brown; legs brown, with trochantelli, base and apex of femora and entire protibia, base and apex of meso- and metatibiae, and tarsi except tarsomere 5 of all legs and metatarsomere 1 paler, almost white; tarsomere 5 brown and metatarsomere 1 light brown. Head. Width not measurable (Fig. 76 ). Antenna. Fl1 slightly longer than fl2, apparently with 8 mps; fl2-fl8 with 8 mps (possibly 9 or 10 on fl7 and fl8); clava with about 22 mps, 8 on first, 6 on second and 8 on third segment (Fig. 78 ). Antennal measurements (n=1), length/width (ratio of flagellar segments): scape 145/47 (3.10), pedicel 58/42 (1.37), fl1 86/56 (1.53), fl2 84/52 (1.60), fl3 82/50 (1.63), fl4 81/50 (1.63), fl5 86/53 (1.62), fl6 82/51 (1.59), fl7 78/50 (1.57), fl8 76/48 (1.58); entire clava 143/55 (2.59), with segments 1-3 length [measured along dorsal margin], 46, 35, and 64. Mesosoma. Width not measurable, length 580. Wings. Fore wing length 1154, width 397, length/width 2.91, longest marginal setae 46; cubital line extending to just proximal to base of parastigma (Fig. 79 ). Hind wing length 942, width 130, longest marginal setae 66. Legs. Protibia with 6 short, thick pegs along its length and transverse row of 4 abutting pegs apically (as in Fig. 53 ). Metasoma. Metasoma (Fig. 77 ) in lateral view 224 at highest point, gradually widening from petiole to about 0.6 of gaster length towards apex, then more abruptly narrowing to cerci. Gaster length 765, about 1.63 × as long as mesosoma; gt1-gt6 lengths about ≈ 156, ≈ 94, 87, 112, 118, 152; hypopygium (Fig. 77 , positioned at right angle to metasoma) extending about 0.7 × length of gaster, extending to about halfway towards apex of tergum 5. Ovipositor broken and partly missing, with estimated length (from basal loop to posterior apex of sheath) ≈ 864, about 2.11 × metatibia length (410), extending anteriorly to about level of apex of mesocoxae and extending posteriorly slightly beyond apex of gaster (Fig. 77 ).

Male. Unknown.

Etymology.

The species name, Neotriadomerus crassus , is Latin for thick or stout, referring to the fairly short, thick funicle segments in females.

Figures

Figures 76, 77. Neotriadomerus crassus, holotype. 76 head + anterior of mesosoma, dorsolateral 77 mesosoma + metasoma (ovipositor broken off near base of hypopygium), dorsolateral. Scale bar for 76 = 200 μm; 77 = 500 μm.

Figures 78 - 80. Neotriadomerus crassus, holotype. 78 antenna 79 wings 80 type slide. Scale bar = 500 μm.

Figures 50 - 55. Neotriadomerus spp. 50 N. darlingi male parastigma, dorsal 51 N. longissimus female parastigma, ventral 52 N. darlingi male stigmal vein, dorsal 53 N. longissimus female calcar, lateral 54 N. sp. female calcar, dorsolateral 55 N. sp. female pretarsus, dorsolateral. Scale bar for 50, 53, 54 = 50 μm; 51 = 100 μm; 52, 55 = 20 μm.