Tubpontania

Vikberg, Veli, 2010, European species of Tubpontania gen. nov., a new genus for species of the Pontania crassispina group (Hymenoptera: Tenthredinidae: Nematinae), Zootaxa 2620, pp. 1-28 : 5-6

Key to females of European Tubpontania .

1 Tegula dark brown to black, occasionally brown. Stigma pale yellow. Lancet: ctenidia reach aulax on annulets 2–4 ( Fig. 9), basal third of teeth 10–15 distinctly elevated ( Figs 11–12 )............................................................................ 2

1* Tegula yellow to brownish yellow. Stigma often apically infuscate. Lancet: ctenidia do not reach aulax on annulets 2–4 ( Fig. 10), basal third of teeth 10–15 not elevated ( Figs 13–17 )............................................................................. 3

2 Hind femur pale or infuscate only basally. Pubescence on abdominal terga 2–4 longer, thicker and covering the midline ( Zinovjev & Vikberg 1999, fig. 37). Ovipositor sheath distinctly shorter than head width: index 0.76–0.94 ........ .................................................................................................................................................................. anomaloptera

2* Hind femur black. Pubescence on abdominal terga 2–4 shorter, thinner and often with a narrow glabrous area on midline ( Zinovjev & Vikberg 1999, fig. 38). Ovipositor sheath as long as or longer than head width: index 1.00–1.15 ..................................................................................................................................................................... crassispina

3 Hind femur entirely reddish yellow or slightly infuscate near base or on lower side. Upper part of mesepisternum smooth or slightly sculptured........................................................................................................................................ 4

3* Hind femur mostly black. Upper part of mesepisternum often strongly sculptured. Glabrous longitudinal area on mesepisternum between mid and lower third ............................................................................................................... 5

4 Apex of sawsheath with tuft of long, curved setae, dorsal margin of sheath glabrous basad of tuft ( Fig. 4 ). Stigma bicoloured, apically infuscate. ............................................................................................................................ cyrnea

4* Sawsheath with shorter setae which are distributed in larger area, subapical tuft of long curved setae missing, dorsal margin of sheath with short setae ( Fig. 5 ). Stigma uniformly brownish yellow............................................ purpureae

5 Sawsheath on dorsal margin with 3–6 short setae basad of apical tuft of long setae ( Fig. 6 ). Midlobe of mesoscutum medially strongly sculptured, not shining. Upper part of mesepisternum with strong microsculpture. Lancet with emarginate cypsellae ( Fig. 15 ) ....................................................................................................................... nudipectus

5* Sawsheath on dorsal margin without setae or with 1–2 setae close to apical tuft of long setae ( Fig. 6 ). Midlobe of mesoscutum medially with weak sculpture, shining. Upper part of mesepisternum often with weak surface sculpture. Lancet without emarginate cypsellae ( Figs 16–17 ) ........................................................................................ nitidinota

Key to males of Tubpontania (males of T. crassispina and T. nitidinota unknown)

1 Tegula dark brown to black. Pubescence on abdominal terga 2–4 longer, thicker and covering midline. Penis valve ( Fig. 18 ) .................................................................................................................................................... anomaloptera

1* Tegula yellow to brownish yellow. Pubescence on abdominal terga 2–4 shorter, thinner and often there is a narrow glabrous area on midline............................................................................................................................................... 2

2 Hind femur entirely reddish yellow or slightly infuscate near base. Upper part of mesepisternum smooth or slightly sculptured...................................................................................................................................................................... 3

2* Hind femur mostly black. Upper part of mesepisternum strongly sculptured. Glabrous longitudinal area on mesepis-

ternum between mid and lower third. Penis valve ( Fig. 21 )......................................................................... nudipectus 3 Flagellum shorter: flagellum / head width index ca. 2.1. Penis valve ( Fig. 19 )................................................. cyrnea 3* Flagellum longer: flagellum / head width index ca. 2.7. Penis valve ( Fig. 20 )............................................. purpureae

Key to leaf-rolls and larvae of Tubpontania (larva of T. nitidinota feeding on Salix phylicifolia is unknown)

1 Leaf-roll on Salix caprea ; tight roll, many-layered, not twisted, smooth. Anal tergum of larva without black stripes, pseudocerci apically black.................................................................................................................................. cyrnea

1* Leaf-roll on other willow species................................................................................................................................. 2

2 Leaf-roll on Salix purpurea ; twisted. Anal tergum of larva without dark spots. ( Beneš 1968, fig. 3: leaf roll; fig. 15: anal tergum) .................................................................................................................................................... purpureae

2* Leaf-roll on other willow species................................................................................................................................. 3

3 Upper epidermis of roll eaten when larva large. Leaf-roll on Salix phylicifolia , hastata , starkeana . Larva: anal ter- gum without black stripes. ....................................................................................................................... anomaloptera

3* Upper epidermis of roll intact...................................................................................................................................... 4

4 Leaf-roll on Salix phylicifolia ; twisted. Anal tergum of larva with black longitudinal lateral stripes ( Vikberg 1965, fig. 14)........................................................................................................................................................... nudipectus

4* Leaf-roll on Salix glauca , hastata ; not twisted. Anal tergum of larva with small blackish spots............... crassispina

Figures

FIGURES 11 – 13. Apical segments of lancet of Tubpontania species in lateral view. Fig. 11. T. anomaloptera (drawn after specimen from Vihti). Fig. 12. T. crassispina (drawn after specimen from Kilpisjärvi). Fig. 13. T. cyrnea (drawn after specimen from Kirkkonummi, Siikajärvi). Scale line 0.1 mm.

FIGURES 2 – 8. Sawsheaths of Tubpontania species in dorsal view. Fig. 2. T. anomaloptera (drawn after lectotype of Nematus anomalopterus). Fig. 3. T. crassispina (drawn after specimen from Saana, ex larva on Salix glauca). Fig. 4. T. cyrnea (drawn after holotype of Pontania cyrnea). Fig. 5. T. purpureae (drawn after lectotype of Euura acuminata). Fig. 6. T. nudipectus (drawn after paratype, Kitee, ex larva on Salix phylicifolia). Fig. 7. T. nitidinota (drawn after holotype, Nilsiä). Fig. 8. T. nitidinota (drawn after an aberrant female, Pälkäne, ex larva on Salix phylicifolia). Scale line 0.1 mm.

FIGURES 14 – 17. Apical segments of lancet of Tubpontania species in lateral view. Fig. 14. T. purpureae (drawn after specimen from Tring). Fig. 15. T. nudipectus (drawn after holotype, Kitee, ex larva on Salix phylicifolia). Fig. 16. T. nitidinota (drawn after holotype, Nilsiä). Scale line 0.05 mm. Figure 17. T. nitidinota (drawn after holotype, Nilsiä), lancet in lateral view (basalmost part of radix drawn separately). Scale line 0.1 mm.

FIGURES 18 – 21. Penis valves of Tubpontania species in lateral view. For each species whole penis valve (scale line 0.1 mm) and apical part of penis valve in higher magnification (scale line 0.05 mm) is drawn. Fig. 18. T. anomaloptera (drawn after specimen from Pihtipudas). Fig. 19. T. cyrnea (drawn after specimen from Kirkkonummi). Fig. 20. T. purpureae (drawn after specimen from Tring). Fig. 21. T. nudipectus (drawn after paratype, Kitee, ex larva on Salix phylicifolia).