Ypsilonigaster naturalis Fernandez-Triana & Boudreault, 2018

Fernandez-Triana, Jose L & Boudreault, Caroline, 2018, Seventeen new genera of microgastrine parasitoid wasps (Hymenoptera, Braconidae) from tropical areas of the world, Journal of Hymenoptera Research 64, pp. 25-140 : 106-108

Ypsilonigaster naturalis Fernandez-Triana & Boudreault sp. n.

Fig. 41

Holotype.

Female, Malaysia, RMNH.

Holotype labels.

MALAYSIA: SE.SABAH /nr Danum Valley Field C./WON1, Mal. trap 5, c.150m/5-26.x.1987, RMNH’ 87/C.v.Achterberg &D.Kennedy. Second label: CNC878528.

Holotype locality.

MALAYSIA, South-East Sabah, near Danum Valley, Field C., 150m.

Paratypes.

Malaysia. (3♀ RMNH, CNC), same locality than holotype, Voucher codes: CNC878529, CNC878530, CNC878531.

Diagnosis.

The combination of body colour mostly yellow (but with back of head and anteromesoscutum orange to orange-brown; antenna, tegula and humeral complex brown; and tergites 5+ mostly brown) and T1 sculpture and shape (T1 smooth and strongly narrowing towards posterior margin, its width at anterior margin at least 1.2 × its width at posterior margin) are enough to separate Y. naturalis from all other known species in the genus.

Description.

Body colour mostly yellow (but with back of head and anteromesoscutum orange to orange-brown; antenna, tegula and humeral complex brown; and tergites 5+ mostly brown). Body mostly smooth (including most of propodeum, entire scutellar disc, and most tergites except for T2 which is coarsely sculptured), anteromesoscutum sparsely punctate. Scutoscutellar sulcus with 10 crenulae. Lunules relatively low (around 0.3 × height of lateral face of scutellum). Propodeum with strongly raised, median carina. Fore wing with small, slit-shaped areolet. Hind wing with more or less straight vannal lobe which is uniformly setose. Metafemur L 3.10-3.14 × its W. Metatibial inner spur L 1.55-1.88 × metatibia outer spur L; metatibia inner spur 0.61-0.71 × first segment of metatarsus L. T1 divided in three areas by a strong sulcus shaped as an inverted “Y”; T1 L 1.70-1.88 × T1 width at posterior margin. T2 subtriangular; T2 width at posterior margin 3.28-4.21 × T2 L. Ovipositor sheaths uniformly setose and 0.65-0.67 × as long as metatibia length. Body measurements (mm). F2 L: 0.28 (0.28); F3 L: 0.27 (0.27); F14 L: 0.21 (0.21); F15 L: 0.18 (0.18-0.19); Malar sulcus L: 0.08 (0.08); Mandible W: 0.12 (0.12-0.13); T1 L: 0.64 (0.67-0.68); T1 W at posterior margin: 0.36 (0.36-0.39); T1 maximum W: 0.59 (0.58-0.63); T2 W at anterior margin: 0.38 (0.34-0.38); T2 W at posterior margin: 0.68 (0.67-0.68); T2 L: 0.21 (0.16-0.19); Metafemur L: 1.16 (1.14-1.15); Metafemur W: 0.38 (0.37); Metatibia L: 1.36 (1.33-1.39); Inner spur L: 0.38 (0.41); Outer spur L: 0.24 (0.22-0.25); First segment of Metatarsus L: 0.62 (0.58); Ovipositor sheaths L: 0.88 (0.88-0.93); Body L: 3.80 (3.64-3.96); Fore wing L: 3.92 (3.64-3.92). Maximum W of T1 and T2 W at anterior margin are approximate for 2 specimens. T1 L is approximate for 3 specimens. T1 W at posterior margin and T2 W at posterior margin are approximate for 1 specimen.

Male.

Unknown.

Biology.

Host unknown.

Distribution.

Only known from the type locality in Malaysia.

Molecular data.

No molecular data available.

Etymology.

Named after the Naturalis Biodiversity Center in Leiden (the Netherlands) in recognition of the outstanding and important collection of 18+ million insect specimens that institution holds, including one of the largest and most complete Microgastrinae collection in the world.

Figures

Figure 41. Ypsilonigaster naturalis female holotype. A Habitus B Head frontal C Fore wing D Head and mesosoma, dorsal E Metasoma dorsal F Propodeum.