Tubpontania purpureae ( Cameron, 1884 ) Cameron, 1884

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 : 16-18

Tubpontania purpureae ( Cameron, 1884) , comb. nov.

Figs 5 , 14 , 19 .

Nematus purpureae Cameron, 1884: 80 . Euura acuminata Enslin, 1915: 339 .

Notes on original descriptions and type material. Nematus purpureae was described by Cameron (1884) from near Worcester, England, where J. E. Fletcher reared adults from leaf-rolls on Salix purpurea . No additional records were given by Cameron (1885). Kopelke (2007a: 80) designated a female lectotype ( NHML) for the species. The same specimen was labelled as the holotype of the species by Benson in 1936. The lectotype (in bad condition) has not yet been seen by me.

Euura acuminata was described by Enslin (1915) based on some females from “Merseburg” [probably in error for Meissen]. Kopelke (2007a: 78) designated a female lectotype ( ZSM) from Meissen, Germany. This specimen had been identified as Nematus proximus Lep. by O. Conde. Kopelke (2007c: 171, 173–175) considered it to be Phyllocolpa purpureae and synonymized it with that species. The lectotype was examined by me. The photographs of the lectotype are presented in Taeger & Blank (2008) under Phyllocolpa purpureae . Sawsheath ( Fig. 5 ).

Measurements of the lectotype female of Euura acuminata . Body 4.4. Fore wing 4.0, costa 2.3. Head width 1.10, head height 0.80, head length 0.65. Malar space 0.07. Intertorular distance 0.15. Compound eye 0.48 x 0.33. Distance between eyes on frons 0.70, on face 0.69. POL 0.25, OOL 0.21, OD 0.08. Postocellar area 0.14 x 0.36. Flagellomeres 1–5: 0.41 (height 0.10), 0.42, 0.39, 0.31, 0.29, apical flagellomeres missing. Hind femur 1.13, height 0.24. Hind tibia 1.30, apical width 0.18, inner hind spur 0.23, outer spur 0.18. Hind tarsomeres 1–5: 0.51, 0.25, 0.17, 0.10, 0.27; total 1.30. Hind claw 0.12. Ovipositor sheath 0.92. Sawsheath 0.50 x 0.12. Cercus 0.16 x 0.04.

Further description. Female. Lancet: radix with a group of 8 pores and 2 isolated pores, lamnium with 19 segments, apically slightly curved, annulus 2 with some 12 ctenidial spines, ctenidial spines on annuli 3–5 long, not reaching aulax. Tooth 10 from base with 9–12 distinct serrulae, with basal third not elevated, postcalcar acute, cypsella long, slightly emarginated.

The sawsheath has short setae and a tuft of long curved subapical setae is missing. Figure 10 in Zinovjev & Vikberg (1999) shows the usual distribution of setae, but number of setae can vary and be less numerous, as in the lectotype of Euura acuminata .

Measurements of a large female of Tubpontania purpureae from Ljubljana. Body 4.0. Fore wing 4.0, costa 2.2. Head width 1.10, head height 0.80, head length 0.67. Malar space 0.09. Intertorular distance 0.15. Compound eye 0.50 x 0.36. Distance between eyes on frons 0.72, on face 0.72. POL 0.23, OOL 0.20, OD 0.07. Postocellar area 0.14 x 0.35. Flagellomeres 1–7: 0.43 (height 0.10), 0.44, 0.41, 0.31, 0.29, 0.27, 0.30 (height 0.06); total 2.45. Hind femur 1.08, height 0.25. Hind tibia 1.22, apical width 0.16, inner hind spur 0.22, outer spur 0.17. Hind tarsomeres 1–5: 0.45, 0.20, 0.15, 0.08, 0.23; total 1.11. Hind claw 0.13. Ovipositor sheath 1.05. Sawsheath 0.53 x 0.13. Cercus 0.15 x 0.04.

Male. Measurements of a large male of Tubpontania purpureae from Hertfordshire, Tring: Body 3.9. Fore wing 3.9, costa 2.2. Head width 1.10, head height 0.75, head length 0.63. Malar space 0.07. Intertorular distance 0.13. Compound eye 0.48 x 0.36. Distance between eyes on frons 0.70, on face 0.67. POL 0.22, OOL 0.20, OD 0.08. Postocellar area 0.13 x 0.36. Flagellomeres 1–7: 0.46 (height 0.12), 0.51, 0.49, 0.40, 0.38, 0.37, 0.43 (height 0.07); total 3.04. Hind femur 1.05, height 0.23. Hind tibia 1.19, apical width 0.20, inner hind spur 0.20, outer spur 0.16. Hind tarsomeres 1–5: 0.49, 0.23, 0.17, 0.09, 0.26; total 1.24. Hind claw 0.14. Hypopygium 0.74 x 0.60.

Variability. Length of body in females 3.0– 4.3 mm, in males 3.4–3.9 mm. Head width in females 0.90– 1.12 mm, in males 0.99–1.10 mm.

Ovipositor sheath / head width index 0.84–0.99 (mean 0.90, n=5). Lamnium of lancet / head width: 0.79 / 1.11 = 0.71 (Tring 22.5.1941)

Sex ratio. The entire material studied consists of only 10 females and 5 males. This is completely insufficient for calculation of a sex ratio.

Host plants, gall and larva. Salix purpurea is recorded as the host plant by several authors (e.g. Cameron 1884, Benson 1938, Stritt 1938, Benander 1966, Beneš 1968, Kopelke 2007c). The gall was described by all of them; mostly apical leaves of the willow are rolled down and the whole leaf is twisted. The larva was briefly described by Cameron, Stritt and Benander, and a detailed description given by Beneš (1968). The species has two generations per year ( Stritt 1938, Beneš 1968).

Distribution. Austria, Czech Republic, France, Germany, Great Britain, Italy, Latvia, Morocco ( Lacourt 1997), Poland, Russia, Slovakia, Slovenia, Spain, Sweden ( Benander 1966), Switzerland, Ukraine.

Material / specimens examined: Austria. Lower Austria, Semmeringgebiet, Hollenthal, 1♀ 31.5.1957, leg. R. B. Benson ( CVV). Salzburg, Weissenbach, 1♀ (reared specimen), the leaf-roll (SZ 24 / 2003) on Salix purpurea was taken on 31.7.2003 and the female emerged in April 2004. The specimen was identified as Ph. purpureae by Kopelke ( FNMS).

Czech Republic. Bohemia, Kolin, 1♀ 9.5.1963, leg. A. Hoffer ( CVV). Bohemia, Skryje, 1♀ 24.5.1959, leg. K. Beneš (CKB

Germany. Baden-Württemberg, Markelfingen / Schlafbach, 1♀ (reared specimen), the leaf-roll (SZ 6 / 2006) on Salix purpurea was taken on 2.7.2006 and the female emerged on 7.9.2006. The specimen was identified as Ph. purpureae by Kopelke (FNMS). Sachsen, Meissen, 1♀ (lectotype of Euura acuminata ; ZSM).

Slovenia. Ljubljana (“Laibach”), 1♀, leg. Palmén (ZMH). Hrusica, Karawanken, 2♀ (reared specimens), the leaf-rolls (SZ 1 / 2007) on Salix purpurea were taken on 28.5.2007 and the females emerged in April 2008. The specimens were identified as Ph. purpureae by Kopelke (FNMS).

United Kingdom. England, HT. (= Hertfordshire), Tring, 1♀ 1♂ 12.5.1937, 3♂ 1.6.1937, 1♂ 21.5.1941, leg. R. B. Benson (RSME, ZMH, CVV); two males labelled Pontania purpureae Cam. ♂ det. R. B. Benson 1939 or 1944, one female labelled Pontania purpureae Cam. ♀ det. R.B. Benson 1944 and one male labelled Phyllocolpa purpureae Cam. ♂ det. R. B. Benson 1963.

Figures

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).