Atoposega Krombein

Kimsey, Lynn S., 2014, Reevaluation of the odd chrysidid genus Atoposega Krombein (Hymenoptera, Chrysididae, Amiseginae), ZooKeys 409, pp. 35-47 : 37-38

Genus Atoposega Krombein

Atopogyne Krombein, 1957: 184. Type: Atopogyne lineata Krombein, 1957: 186. Nec Forel 1911. Original designation

Atoposega Krombein, 1960: 33. Replacement name for Atopogyne Krombein.

Diagnosis.

Female Atoposega most closely resemble those of Mahinda Krombein based on the acute or spine-like propodeal angles and mesopleuron with-well developed omaulus. Female Atoposega differ from Mahinda as they are fully winged (all known Mahinda are strongly brachypterous), the hindcoxa has with two longitudinal carina (one or none in Mahinda ), and the mesopleuron has a dorsally carinate and U-shaped posteromedial groove (a narrow, parallel-sided longitudinal groove in Mahinda ). In addition Mahinda females have two sharp submedial angles above the posterior propodeal declivity, which do not occur in Atoposega . Perissosega females are fully winged, but unlike Atoposega and Mahinda have a transverse frontal carina, and lack an omaulus. Atoposega can be distinguished from other amisegine genera by these characters, and by the dentate tarsal claws, malar space with a vertical sulcus, frons without transverse carina, vertex without longitudinal welt, pronotum with posteromedial longitudinal pit, and short sulcus and pit adjacent to lateral posterior lobe, mesopleuron without scrobal sulcus, metanotal dorsal enclosure usually V-shaped, propodeum with two dorsomedial decumbent angles and posterior declivity smooth and impunctate, with longitudinal medial carina, and forewing with an arcuate Rs vein.

Generic description.

Head: occipital carina well-developed, visible laterally; eye with tiny sparse setulae, encircled by carina; scapal basin deep, wide and coarsely cross-ridged; malar space with vertical groove; female flagellum short, fusiform and flattened on one surface. Mesosoma: pronotum with posteromedial groove and deep pit before lateral lobe, 0.8 –0.9× as long as combined lengths of scutum, scutellum and metanotum; scutum with notauli deep and narrow, without parapsides; mesopleuron evenly punctate, omaulus well-developed, scrobal sulcus absent, posteromedial fossa U-shaped, carina edged; metanotum elongate, subequal in length to scutellum, with triangular medial enclosure; propodeum dorsal surface bending abruptly to posterior declivity, lateral angles long, spike-like; hindcoxa with two longitudinal, dorsobasal carinae; tarsal claw with large medial tooth; female fully winged; forewing R1 clearly indicated, medial vein arising before cu-a, Rs extended at abrupt angle by dark streak; wings densely setose, often banded. Metasoma: sternum I produced into large basal keel.

Distribution.

Atoposega species have been collected in Myanmar, Borneo, Thailand and Malaysia.

Key to the species of Atoposega