Neotriadomerus longissimus 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 : 25

Neotriadomerus longissimus Huber sp. n.

Figs 36-37 , 38 , 48 , 51 , 53 , 63 , 126 , 127

Type material.

Holotype female (ANIC) on point labelled: 1. "Blundells ACT 27 Feb 1951 H M Cage". 2. "Holotype Neotriadomerus longissimus Huber ♀".

Paratype. 1 female. AUSTRALIA. Queensland: Brisbane Forest Park, 27°25'04"S; 152°49'48"E, 23-29.x.1998, N. Power, dry sclerophyll, MT (1♀, CNC).

Diagnosis.

Neotriadomerus longissimus differs from other species of Neotriadomerus as follows: body 5000-almost twice the length of any other species (Fig. 126 ); head cuboidal, with vertex horizontal, almost at right angle to the face (Fig. 126 ); mid ocellus almost in contact with the transverse trabecula; mandible massive (Fig. 36 ); gaster with basal sac extending anteriorly well anterior to head (Figs 38 , 63 , 126 , 127 ).

Description.

Female. Body length 5000-5450 (n=2, card and point-mounted holotype and paratype), excluding basal sac of gaster (5900-6300 if this included). Colour. Holotype body black except for brown mandibles, scutellum, and most of middle segments of metasoma; legs and apex of anterior extension of ovipositor brownish yellow; paratype body (Figs 126 , 127 ) uniformly brown, except for almost black head and scape brown, legs mostly yellow except for partly or almost entirely brown coxae and metafemur, anterior extension of ovipositor from level of head almost white (Figs 126 , 127 ). Head. Head width 640-690. Vertex horizontal, forming almost right angle with face, with ocelli in anterior half and mid ocellus in contact with transverse trabecula. Eye almost circular, slightly narrower ventrally than dorsally. Gena at dorsal and ventral margins of eye almost equally wide. Mandible massive, extending ventral to head by at least half face height. Antenna. Each funicle segment in lateral view at least twice its width as in dorsal view, with about 25-30 short mps in 3 more or less overlapping whorls (Fig. 38 ). Clava with about 10 mps on each segment. Antennal measurements (n=2), length/width (ratio of flagellar segments): scape 297-317/109-119 (2.58-2.91), pedicel 54-69/59-69 (1.08-1.07), fl1 228/109-119 (1.92-2.09), fl2 262-267/89-109 (2.45-2.94), fl3 248-257/89-99 (2.60-2.78), fl4 238-248/79 (3.00-3.13), fl5 228/69-74 (3.07-3.29), fl6 198-218/69 (2.86-3.14), fl7 178-198/69 (2.57-2.86), fl8 168-178/69 (2.23-2.57), entire clava 267/64-69 (3.86-4.05), with segments 1-3, respectively, 109, 69 and 89-99 long. Mesosoma. Mesosoma length 110-120. Wings. Fore wing length (n=2) 2460-2790, width 670-845, length/width 3.30-3.72, longest marginal setae 100; cubital line of setae extending halfway between apex and base of parastigma (about midway between level of proximal and distal macrochaetae). Hind wing length 1970-1790, width 205-230, longest marginal setae 100-130. Metasoma. Metasoma (paratype only) in dorsal view thin, 260 at its widest (near apex) and 80 at its narrowest, its length (near middle) 345 and 390 (holotype and paratype), 3.18-3.25 × as long as mesosoma; in lateral view 435 high (near apex) and 205 (near middle); gt1-gt7 lengths (paratype only) 715: 690: 155: 715: 740: 435: 80; hypopygium extending about 0.3 × length of gaster. Ovipositor sheath length (n=2) 5900-6300, 6.23-7.9 × metatibia length (795-950) and extending anteriorly to well in front of head but barely extending posterior to apex of gaster (Fig. 126 ).

Male. Unknown.

Etymology.

The species name, Neotriadomerus longissimus , is Latin for longest, referring the extremely long gaster.

Figures

Figures 32 - 37. Neotriadomerus spp. 32 N. gloriosus female head, anterior 33 N. darlingi male head + pronotum, dorsal 34 N. gloriosus lower face + mouthparts, anterior 35 N. gloriosus maxillae + labium, anterior 36 N. longissimus head, scape and mandibles, dorsoanterolateral 37 N. longissimus radicle, anterolateral (and showing 3 - way junction of transverse, supraorbital and preorbital trabeculae). Scale bar for 32, 33, 36 = 100 μm; 34 = 50 μm; 35, 37 = 20 μm.

Figures 38 - 43. Neotriadomerus spp. 38 N. longissimus female scape-base of fl 2, lateral 39 N. sp. female fl 8 + clava, lateral 40 N. darlingi male apex of pedicel-base of fl 2, lateral 41 N. darlingi male fl 11 - fl 13, lateral 42 N. darlingi male fl 11, lateral 43 N. darlingi male apex of fl 11, lateral. Scale bar for 38 = 100 μm; 39, 41 = 50 μm; 40, 42, 43 = 20 μm.

Figures 44 - 49. Neotriadomerus spp. 44 N. darlingi mesosoma, dorsal 45 N. sp. mesosoma, dorsolateral (arrows indicate pores) 46 N. sp. base of left wings (ventral) and surrounding mesosoma, dorsolateral 47 N. darlingi fore wing base, dorsal 48 N. longissimus fore wing base, ventral 49 N. sp., hind wing attachment to fore wing, ventral. Scale bar for 44, 45, 48 = 100 μm; 46, 47, 49 = 50 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.

Figures 61 - 66. Neotriadomerus spp. 61 N. sp. apex of gaster, lateral 62 N. sp. gt 7 + ovipositor apex, lateral 63 N. longissimus ovipositor sac, lateral 64 N. sp. male ovipositor apex, lateral 65 N. darlingi apex of gaster, posterolateral 66 N. powerae male genitalia, lateral. Scale bar for 61 = 100 μm; 62 = 50 μm; 63 = 200 μm; 64 - 66 = 20 μm.

Figures 126, 127. Neotriadomerus longissimus, paratype, lateral (Brisbane Forest Park). 126 habitus, lateral 127 anterior body, enlarged. Scale bar for 126 = 2000 μm; 127 = 1000 μm.