Fig 1. Female, Platystethynium

Nomenclature

Platystethynium Ogloblin, 1946: 290. Type species Platystethenium onomarchicidum Ogloblin, by original designation.
Platypatasson Ogloblin, 1946: 293. Type species Platypatasson fransseni Ogloblin, by original designation. Synonymy by Donev & Huber, 2002.

Diagnosis

Platystethynium belongs to the Clerchus group of genera and diagnostic characters are as follows:

• Antenna 11-segmented, with a 3-segmented clava; funicle segments submoniliform; F5 and clava with placoid sensorial
• Forehead distinctly divided into ventral and dorsal halves, the former with two curved trabeculae, which extend from clypeus to antennal scrobes
• Mandible small, toothless, apparently not movable (without articular processes); gnathal aperture small, ventral, removed from occipital border
• Epicranial sutures joining the posterior ones before anterior ocellus so as to form X-shaped figure
• Pronotum large, completely divided longitudinally
• Wings with narrow discal blade, sharply pointed distally
• Legs short and stout; fore tibiae with strong spines on the ventral surface; hind femora distinctly swollen and compressed
• Abdomen broadly sessile; ovipositor protruding, the whole body strongly flattened dorsoventrally

Geographic Distribution

Indonesia (Java) (Ogloblin, 1946), India (Meghalaya) (new record).

Hosts and habitat

Ex. eggs of Tettigonoidea, Saltatoria (P. onomarchicidum recorded from eggs of Onomarchus uninotatus) (Ogloblin, 1946).

Species in India

1. Platystethenium onomarchicidum Ogloblin

References

Ogloblin, A. A. 1946. Descriptions of new genera and species of Mymaridae (Hymenoptera: Chalcidoidea). Iowa State College Journal of Science, 20 (3): 293.

Donev, A. and Huber, J. T. 2002. Pseudocleruchus triclavatus Donev and Huber, gen. and sp. nov. (Hymenoptera: Mymaridae), with notes on the Cleruchus - group of genera. Parasitic wasps: evolution, systematic, biodiversity and biological control, pp. 117-123. (Eds: Melika, G. and Thuróczy, C.)

Ramesh Kumar et al., 2013