Notosemus planus Sheng & Sun

Sheng, Mao-Ling, Sun, Shu-Ping, Zhang, Ying & Liang, Yan-Ping, 2016, Three new species of the genus Notosemus Förster, 1869 (Hymenoptera, Ichneumonidae, Ichneumoninae) from China, with a key to the world species, European Journal of Taxonomy 209, pp. 1-19 : 6-10

Notosemus planus Sheng & Sun , sp. nov.

urn:lsid:zoobank.org:act:2254FFA5-96BB-4B24-9870-1A8DA7CD1D6A

Figs 11 –22

Diagnosis

Antenna with 39 flagellomeres, apical portion of flagellum distinctly flattened below. Upper tooth of mandible almost as long as lower tooth. Subocular sulcus absent. Maximum diameter of propodeal spiracle approximately 2.0× as long as minimum diameter. Second tergite coriaceous, with indistinct punctures, 1.5× as long as maximum apical width. Face yellowish white, with median longitudinal black band. Metapleuron with large white spot. Hind tarsus yellow brown.

Etymology

The specific name is derived from the distinctly ventrally flattened apical portion of the antennal flagellum.

Material examined

Holotype

CHINA: ♀, Shangcaiyu, 1690 m, Xizang Autonomous Region, 7 Jul. 2013, leg. Tao Li.

Description

Female

MEASUREMENTS. Body length approximately 16.5 mm. Fore wing length approximately 13.5 mm. Antenna length approximately 13 mm.

HEAD. Face ( Fig. 12 ) approximately 1.3× as wide as long, evenly convex; with indistinct fine punctures, median portion with irregular, elongate punctures; median portion of upper margin between antennal sockets finely carinate, with a small median tubercle. Clypeal suture shallow, median section indistinct. Clypeus 2.1× as wide as long, basal portion with sculpture as face, apical portion smooth; lateral portion of apical margin oblique straight, median portion slightly evenly concave. Subbase of mandible slightly convex, upper tooth almost as long as lower tooth. Subocular sulcus absent. Malar space approximately 0.6× as long as basal width of mandible. Gena ( Fig. 13 ) widened, evenly convex, smooth, shiny, with sparse, indistinct punctures. Vertex ( Fig. 14 ) shiny, with sparse shallow punctures. Interocellar area with indistinct longitudinal wrinkles, impunctate. Postocellar line approximately 0.5× as long as ocularocellar line. Frons with strong transverse wrinkles; lateral and lower portions almost smooth, shiny. Antenna ( Fig. 15 ) with 39 flagellomeres, apical portion distinctly flattened below. Ratios of lengths from first to fifth flagellomeres: 11.5:8.9:8.7:8.5:6.5. Occipital carina complete, lower end reaching base of mandible.

MESOSOMA. Upper portion of pronotum ( Fig. 16 ) with distinct longitudinal wrinkles; latero-posteriorly with dense oblique longitudinal wrinkles; dorso-posteriorly with fine punctures. Mesoscutum (Fig. 17) strongly convex, with irregular punctures; posterior submedian portion smooth. Notaulus anteriorly distinct. Scuto-scutellar groove deep, smooth, shiny. Scutellum shiny, with weak, uneven, fine punctures; lateral carina strong, almost reaching apex of scutellum. Postscutellum transverse, shiny, with indistinct fine punctures; anterior lateral portion deeply concave. Upper anterior and median portions of mesopleuron (Fig. 18) with transverse wrinkles; upper median with indistinct punctures; lower portion slightly shagreened, irregularly finely reticulate. Speculum small. Upper end of epicnemial carina reaching about 0.4 height of posterior margin of pronotum. Metapleuron convex, with dense, illdefined punctures; anterior margin with short transverse wrinkles. Juxtacoxal carina absent. Juxtacoxal area shiny, with oblique wrinkles dorsally, ventrally with sparse fine punctures. Submetapleural carina complete, strong. Wings brownish hyaline. Fore wing with vein 1cu-a opposite 1-M. Areolet (Fig. 19) quadrangular, receiving vein 2m-cu at anterior 0.35. 2-cu slightly longer than 2cu-a. Hind wing vein 1-cu about 4.0× as long as cu-a; 1-cu reclivous. First tarsomere of hind leg 0.85× as long as second to fifth tarsomeres together except claws. Ratio of length of hind tarsomeres 1:2:3:4:5 is 8.5:3.4:2.7:1.2:2.1. Tarsal claws simple. Propodeum (Fig. 20) irregularly reticulate. Area superomedia almost complete, connecting costula at its anterior 0.35. Lateral longitudinal carina vestigial. Pleural carina complete, strong. Apical transverse carina absent. Propodeal crest strong. Maximum diameter of propodeal spiracle approximately 2.0× as long as minimum diameter.

METASOMA (Figs 21 – 22). First tergite 3.1 to 3.6× as long as apical width; median dorsal carina absent; dorsolateral carina weak, almost reaching to spiracle; petiole slightly shagreened; postpetiole with longitudinal wrinkles. Lateral sides of tergites 2 to 6 almost parallel. Second tergite coriaceous, with indistinct punctures, 1.5× as long as maximum width; thyridia approximately 1.4× as wide as distance between them, 0.9× as wide as distance to base of second tergite; spiracle located approximately at basal 0.4. Third tergite with same sculpture as second tergite; apically with distinct fine punctures; 0.9× as long as maximum width. Tergites 4 to 6 (Fig. 22) almost shiny. Tergite 4 with sparse, distinct punctures. Tergites 5 and 6 with large apical median membranous areas. Ovipositor sheath 0.7× as long as apical depth of metasoma, slightly widened apically. Ovipositor slightly curved upwards, upper and lower valves with distinct ridges.

COLOR ( Fig. 11 ). Black, except following: face except median longitudinal black band, clypeus except black apical margin and black brown along clypeal suture, maxillary and labial palpi, malar area, gena, frons laterally, pronotum anteriorly, tegula, subalar ridge, large upper-median and lower spots of mesopleuron, large median spot of metapleuron, large posterolateral spots of propodeum, anterior and middle coxae and trochanters, dorsal profile of hind coxa, dorsal spot of hind trochanter, small lateral and posterior median spots of postpetiole, white or slightly yellowish white. Flagellomeres 7 to 15 dorsally yellow-white; apically, ventrally reddish brown. Lateral spots of vertex, pronotum dorso-posteriorly, posterior margins of tergites 2 to 4 yellowish white. Submedian triangular spots of mesoscutum, scutellum, postscutellum yellow. Fore and mid femora and tibiae ventrally, hind femur, hind tibia except base, hind tarsus yellow brown. Fore and mid tibiae dorsally, fore and mid tarsi dark brown. Membranous areas of tergites 5 and 6 yellow. Median area of pterostigma red-brown. Veins brown black.

Male

Unknown.

Remarks

This new species can easily be distinguished from Notosemus species by the apically, ventrally flattened antenna (although this is probably not the case for the unknown male), and can be distinguished by the identification key here.

Figures

Figs 11 – 13, 15, 19. Notosemus planus Sheng & Sun, sp. nov., holotype, ♀. 11. Habitus, lateral view. 12. Head, anterior view. 13. Head, lateral view. 15. Antennae. 19. Areolet.

Figs 14, 16 – 18, 20 – 22. Notosemus planus Sheng & Sun, sp. nov., holotype, ♀. 14. Head, dorsal view. 16. Pronotum. 17. Mesoscutum. 18. Mesosoma, lateral view. 20. Propodeum. 21. Metasoma, dorsal view. 22. Apical portion of metasoma, lateral view.