Nipponosega Kurzenko & Lelej, 1994

Mita, Toshiharu, 2021, Taxonomic study of Baeosega and its allies, with description of a new species of Nipponosega (Hymenoptera, Chrysididae, Amiseginae), ZooKeys 1041, pp. 1-25 : 1

Genus Nipponosega Kurzenko & Lelej

Nipponosega Kurzenko & Lelej, 1994: 83. Type species: Nipponosega yamanei Kurzenko & Lelej, 1994, original designation.

Diagnosis.

General characters of Nipponosega are similar to those of Baeosega and Okinawasega . The distinctive characters of Nipponosega are in the developed occipital carina in the female, the short setae on flagellum and the short pronotum in the male. More details, see the diagnosis of Baeosega .

Description.

Female. Clypeal apex not thickened; malar sulcus absent or indicated as faint track; scapal basin shallow, cross-ridged, median longitudinal smooth strip present; occipital carina present, reaching gena (Fig. 8C ); eye setose; flagellum fusiform, intermediate segments broader than long, and with ventral surface flattened. Mesosoma slender, punctate or longitudinally striate; pronotum with median groove and shallow pit before lateral lobe, as long as combined length of mesoscutum, mesoscutellum and metanotum; mesoscutum with notauli and without parapsides; posterolateral corner of mesoscutum not lobate; micropterous (Figs 1D , 2A ), forewing pads extending to posterior margin of mesoscutellum; mesopleuron with omaulus; scrobal sulcus lacking; metanotum triangular, longer than mesoscutellum; propodeum with long dorsal surface and a pair of recumbent teeth present, almost meeting together, dorsal posterolateral angles bluntly angulate, lateral surfaces abruptly declivous and posterior surface rounded. Hind coxa with dorsobasal carina; tarsal claws without inner tooth. Metasoma smooth.

Male. Clypeal apex not thickened; scapal basin flat, cross-ridged, median longitudinal smooth strip present; malar sulcus present; occipital carina absent (Fig. 9C ); eye setose; antenna elongate, F3 2.3 × longer than wide. Mesosoma stout, dorsum punctate; pronotum with median groove and shallow pit before lateral lobe, 0.7-0.9 × as long as mesoscutum (Fig. 9E ); median length of pronotum 0.4-0.5 × as long as combined length of mesoscutum, mesoscutellum and metanotum; mesoscutum with notauli; parapsidal line faintly indicated; mesopleuron without omaulus and scrobal sulcus; metanotum ca. 0.6 × as long as mesoscutellum; a pair of recumbent teeth present, slightly separated each other; propodeum with dorsal posterolateral angles rounded, posterior surface abruptly declivous; fully winged (Fig. 2B ), R1 tubular, thick (Fig. 9D ), not clearly differentiated from pterostigma; Rs extended by weakly curved dark streak; medial vein arising at or before cu-a. Hind coxa with dorsobasal carina; tarsal claws with one small inner tooth. Metasoma punctate with smooth interspaces.

Distribution.

Palaearctic region: Japan (Honshu, Shikoku, Kyushu, northern Ryukyus); Oriental region: China (Zhejiang); Thailand.

Hosts.

Micadina phluctainoides (Rehn, 1904) ( Diapheromeridae ) is considered to be the host of Nipponosega yamanei in Japan ( Mita 2014).

Figures

Figure 1. General habitus of Amiseginae A Baeosega humida Krombein, holotype ♀ B B. torrida Krombein, holotype ♀ C ditto, allotype ♂ D Nipponosega lineata sp. nov., holotype ♀. Scale bars: 1.0 mm.

Figure 2. General habitus of Amiseginae A Nipponosega yamanei Kurzenko & Lelej, holotype ♀ B ditto, ♂ C Okinawasega eguchii Terayama ♀ D ditto, holotype ♂. Scale bars: 1.0 mm.

Figure 8. Nipponosega yamanei Kurzenko & Lelej ♀ A holotype of N. yamanei, head in frontal view B ditto, dorsal view C female from Aichi, gena (arrow indicates occipital carina) D holotype of N. kantoensis Nagase, head in dorsal view E holotype of N. yamanei, mesosoma. Scale bars: 0.5 mm.

Figure 9. Nipponosega yamanei Kurzenko & Lelej ♂ A Head in frontal view B ditto, lateral view C ditto, dorsal view D forewing, pterostigma and R 1 E mesosoma. Scale bars: 0.5 mm.