Okinawasega Terayama, 1999

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 Okinawasega Terayama

Okinawasega Terayama, 1999: 99. Type species: Okinawasega eguchii Terayama, 1999, original designation.

Diagnosis.

General characters of Okinawasega are similar to those of Baeosega and Nipponosega ; however, there are some distinctive differences, e.g., the deep malar sulcus in the female, the elongated linear R1 in the male. For more details, see the diagnosis of Baeosega .

Description.

Female. Clypeal apex not thickened; malar sulcus present (Fig. 10D ); scapal basin shallow, cross-ridged, median longitudinal carina present; occipital carina absent but posterior margin of vertex forming distinct corner behind ocellar triangle; eye setose; flagellum fusiform, intermediate segments broader than long, and with ventral surface flattened. Mesosoma slender, punctate by dense punctures; 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 (Fig. 2C ), forewing pads extending to posterior margin of mesoscutellum; mesopleuron with omaulus, without scrobal sulcus; metanotum triangular and small, slightly shorter than mesoscutellum; propodeum with long dorsal surface and a pair of recumbent teeth present, almost meeting together, dorsal posterolateral angles bluntly angulate, lateral and posterior surfaces abruptly declivous. Hind coxa with dorsobasal carina; tarsal claws without inner tooth. Metasoma smooth.

Male. Clypeal apex not thickened; scapal basin flat or weakly excavated, cross-ridged; malar sulcus present; occipital carina absent but posterior corner of vertex forming distinct corner behind ocellar triangle, occasionally trace of occipital carina present on upper gena; eye setose; antenna elongate, F3 3.5-4.3 × longer than wide. Mesosoma slender, dorsum punctate by dense punctures; pronotum with median groove and shallow pit before lateral lobe; pronotum as long as mesoscutum, 2/3 of combined length of mesoscutum, mesoscutellum; mesoscutum with notauli; parapsidal line faintly indicated; mesopleuron without omaulus and scrobal sulcus; metanotum approximately half mesoscutellum (Fig. 11E ); a pair of recumbent teeth present, meeting or almost meeting together; propodeum with dorsal posterolateral angles bluntly angulate, posterior surface abruptly declivous; fully winged (Fig. 2D ), pterostigma normal, with linear extension of R1 indicated, long (Fig. 11D , arrow); Rs extended by weakly curved dark streak; medial vein arising before cu-a. Hind coxa with dorsobasal carina; tarsal claws without inner tooth. Metasoma sparsely punctate with smooth interspaces.

Distribution.

Oriental region: Japan (Yaeyama Islands, southern Ryukyus).

Hosts.

Unknown.

Remarks.

The previous record of Baeosega in southern Ryukyus ( Kimsey 1995) should probably be attributed to Okinawasega .

Figures

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 10. Okinawasega eguchii Terayama ♀ A head in frontal view B ditto, dorsal view C ditto, lateral view D ditto, malar space (arrow indicates malar sulcus) E mesosoma. Scale bars: 0.5 mm.

Figure 11. Okinawasega eguchii Terayama ♂ A head in frontal view B ditto, dorsal view C ditto, lateral view D forewing E mesosoma. Scale bars: 0.5 mm.