Platystethynium

Huber, John T. & Read, Jennifer, 2021, A new, remarkable species of Platystethynium (Platypatasson) (Hymenoptera: Mymaridae) from New Zealand, Zootaxa 5052 (2), pp. 215-232 : 229

Key to Eastern Hemisphere Platystethynium species. Females.

1 Clava 3-segmented [ Platystethynium (Platystethynium) ]; fu 5 distinctly larger than fu 4 or fu 6 and with 1 mps.............. 2

- Clava 2-segmented [ Platystethynium (Platypatasson) ]; fu 5 same size as fu 4 or fu 6 and without mps..................... 3

2(1) Fu 3 with 1 mps.............................................................. P. triclavatum (Donev & Huber)

- Fu 3 without mps................................................................ P. onomarchicidum Ogloblin

3(1) Vertex with V-shaped line extending from median ocellus to lateral apices of transverse trabecula and without a pair of short lateral setae about midway between median ocellus and transverse trabecula ( Fig. 22 ); temple with 1 seta near posteroapical angle of eye ( Fig. 22 ); pronotum with 2 short sublateral setae posteriorly; fore wing posterior margin with lobe behind parastigma forming an obtuse angle apically ( Fig. 24 ); frenum about 1.3× as wide as long ( Fig. 25 ); propodeum with V-shaped carinae submedially ( Fig. 25 )................................................................. P. fransseni (Ogloblin)

- Vertex without V-shaped lines extending from median ocellus and without a pair of short lateral setae between median ocellus and transverse trabecula ( Fig. 2a ); temple with 2 setae near posteroapical angle of eye ( Fig. 2a ); pronotum with 1 long submedian seta posteriorly; fore wing posterior margin with lobe behind parastigma forming a right angle apically ( Fig. 5 ); frenum about 2.2× as wide as long ( Fig. 4 ); propodeum without V-shaped lines submedially ( Fig. 4 ).................... P. earlyi Huber

Figures

FIGURES 22–24. Platystethynium (Platypatasson) fransseni (Ogloblin), paratype female. 22, head, dorsal; 23, antenna, lateral; 24. Wings. Scale bars: 22, 23 = 100 μm; 24 = 200 μm.

FIGURES 25, 26. Platystethynium (Platypatasson) fransseni (Ogloblin),paratype female.25, mesosoma,dorsal;26a, metasoma, dorsal; 26b, genitalia (seen through metasoma). Scale bars = 100 μm.

FIGURES 1–3. Platystethynium (Platypatasson) earlyi Huber, holotype. 1, habitus, ventral; 2, head, dorsal; 3, head, ventral. Scale bars: 1 = 200 μm; 2, 3 = 100 μm.

FIGURES 4–6. Platystethynium (Platypatasson) earlyi Huber, holotype. 4, mesosoma, dorsal; 5, wings; 6, holotype slide. Scale bars: 4 = 100 μm; 5 = 200 μm.