Neotriadomerus burwelli 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 : 12-13

Neotriadomerus burwelli Huber sp. n.

Figs 67-68 , 69-71 , 72, 73 , 74-75

Type material.

Holotype female (QMBA) on slide (Fig. 71 ) labelled: 1."Mahogany forest, 1200m Mt Moffatt Nat. Pk, C. Qld 24°56'S, 148°04'E 24-26 Feb 1996 C.J. Burwell mv lamp". 2. "Holotype Neotriadomerus burwelli Huber ♀".

Diagnosis.

Neotriadomerus burwelli differs from the other small (body length less than 2600) species of Neotriadomerus , as follows: fore wing with cubital line extending proximally to base of parastigma (Fig. 70 ); fl1 with 2 mps, fl2 with 4 mps and almost 2 × as long as fl1, and fl2-fl5 each at least 2.0 × as long as wide and with at most 6 long mps in 1 whorl (Fig. 69 ); ovipositor 2.7 × as long as metatibia and extending anteriorly under mesosoma as far as apex of procoxa (Fig. 74 ).

Description.

Female. Body length ≈ 1590 (holotype). Colour. Holotype 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 paler, almost white; tarsomere 5 brown. Head. Head width 305 (Figs 67 , 68 ). Antenna. Fl1 about 0.5 as long as fl2, with 2 mps; fl2 the longest funicle segment, with 4 mps; fl3-fl7 with 4-6 mps; fl8 with 7? mps. Clava with about 12 mps, 5 on first, 2 on second and 5 on third segment (Fig. 69 ). Antennal measurements (n=1), length/width (ratio of flagellar segments): scape 119/20 (3.91), pedicel 50/31 (1.62), fl1 63/27 (2.32), fl2 82/29 (2.82/3.10 [left and right antenna different]), fl3 77/28 (2.80), fl4 73/30 (2.46), fl5 79/28 (2.79/2.36 [left and right antenna different]), fl6 70/30 (2.38), fl7 70/31 (2.27), fl8 69/34 (2.00); entire clava 118/41 (2.89), with segments 1-3 length [measured along dorsal margin] 44, 21, and 54. Mesosoma. Width 250, length 514. Wings. Fore wing length 1074, width 386, length/width 2.78, longest marginal setae 60; cubital line extending to just proximal to base of parastigma (Fig. 70 ). Hind wing length 862, width 118, longest marginal setae ≈ 66. Legs. Protibia with 5 short pegs along its length and a transverse row of 4 abutting pegs apically (as in Fig. 53 ). Metasoma. Metasoma in dorsal view 300 at widest point, gradually widening from petiole to about 0.6 of gaster length towards apex, then more abruptly narrowing to cerci (Fig. 73 ). Gaster length 745, about 1.45 × as long as mesosoma; gt1-gt7 lengths about 220: 105: 100: 100; 130: 98 (Fig. 73 ); hypopygium (apex difficult to see) extending about 0.7 × length of gaster. Ovipositor sheath length 1041, 2.64 × metatibia length (394) and extending anteriorly to just anterior apex of procoxae (Fig. 74 ) and posteriorly slightly beyond apex of gaster (Figs 73 , 75 ).

Male. Unknown.

Etymology.

The species is named after Chris Burwell, curator of insects at the Queensland Museum, who collected the only known specimen of this species.

Figures

Figures 67, 68. Neotriadomerus burwelli, holotype. 67 head, anterior 68 head, posterior. Scale bar = 100 μm.

Figures 69 - 71. Neotriadomerus burwelli, holotype. 69 a right antenna, medial 69 b same antenna, lateral (as seen through antenna) 70 wings 71 holotype slide. Scale bar = 300 μm.

Figures 72, 73. Neotriadomerus burwelli, holotype. 72 mesosoma, dorsal 73 metasoma, dorsal. Scale bar = 300 μm.

Figures 74, 75. Neotriadomerus burwelli, holotype. 74 mesosoma, ventral 75 metasoma, ventral (seen through body). Scale bar = 300 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.