Tubpontania nudipectus ( Vikberg, 1965 ) Vikberg, 1965

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 : 18-20

Tubpontania nudipectus ( Vikberg, 1965) , comb. nov.

Figs 6 , 15 , 21 .

Pontania nudipectus Vikberg, 1965: 54 –57.

Notes on original descriptions and type material. Pontania nudipectus (female, male, gall on Salix phylicifolia , larva) was described by Vikberg (1965). The holotype female from Finland, PK: Kitee, [Papinniemi], reared from larva on Salix phylicifolia , leg. T. Kontuniemi ( MZH no. 5463) was examined. Leaf-rolls of the species were found on 30.6.1963 and the female emerged on 18.7.1963.

The holotype is a rather small specimen. The midlobe of mesoscutum is medially sculptured, mat. Upper half of mesepisternum is strongly wrinkled, mat. Upper margin of sawsheath has 5 setae basad of the long curved subapical setae.

Measurements of the holotype female. Body 4.0. Fore wing 3.9, costa 2.3. Head width 1.05, head height 0.78, head length 0.62. Malar space 0.10. Intertorular distance 0.14. Compound eye 0.42 x 0.32. Distance between eyes on frons 0.72, on face 0.71. POL 0.25, OOL 0.22, OD 0.06. Postocellar area 0.16 x 0.39. Flagellomeres 1–7: 0.40 (height 0.10), 0.38, 0.36, 0.29, 0.25, 0.23, 0.25 (height 0.08); total 2.16. Hind femur 1.12, height 0.25. Hind tibia 1.31, apical width 0.18, inner hind spur 0.25, outer spur 0.20. Hind tarsomeres 1– 5: 0.53, 0.19, 0.14, 0.08, 0.21; total 1.15. Hind claw 0.11. Sawsheath 0.52 x 0.16. Cercus 0.13 x 0.04. Lancet: lamnium 0.72, with 19 segments.

Further description. Female. Lancet: radix with a group of 5–6 pores and no isolated pores, lamnium with 19 segments, apically slightly curved, annulus 2 with 9–13 ctenidial spines, ctenidial spines on annuli 3– 5 long, not reaching aulax. Tooth 10 from base ( Fig. 15 ) with some 15 small serrulae, with basal third not elevated, postcalcar acute, cypsella long, emarginate.

Measurements of a large female of Tubpontania nudipectus from Vehkalahti. Body 4.0. Fore wing 4.2, costa 2.4. Head width 1.18, head height 0.81, head length 0.65. Malar space 0.09. Intertorular distance 0.15. Compound eye 0.50 x 0.36. Distance between eyes on frons 0.78, on face 0.75. POL 0.25, OOL 0.24, OD 0.06. Postocellar area 0.14 x 0.38. Flagellomeres 1–7: 0.41 (height 0.11), 0.40, 0.37, 0.30, 0.27, 0.25, 0.28 (height 0.06); total 2.28. Hind femur 1.20, height 0.23. Hind tibia 1.42, apical width 0.17, inner hind spur 0.30, outer spur 0.21. Hind tarsomeres 1–5: 0.52, 0.21, 0.16, 0.08, 0.25; total 1.22. Hind claw 0.12. Ovipositor sheath 1.03. Sawsheath 0.55 x 0.15. Cercus 0.14 x 0.05.

Male. Measurements of a large male of Tubpontania nudipectus from Helsingin pitäjä: Body 3.8. Fore wing 3.8, costa 2.1. Head width 1.17, head height 0.79, head length 0.68. Malar space 0.09. Intertorular distance 0.14. Compound eye 0.50 x 0.38. Distance between eyes on frons 0.78, on face 0.75. POL 0.25, OOL 0.23, OD 0.08. Postocellar area 0.15 x 0.39. Flagellomeres 1–7: 0.40 (height 0.15), 0.40, 0.39, 0.32, 0.30, 0.28, 0.31 (height 0.08); total 2.40. Hind femur 1.15, height 0.21. Hind tibia 1.30, apical width 0.17, inner hind spur 0.25, outer spur 0.20. Hind tarsomeres 1–5: 0.52, 0.21, 0.16, 0.08, 0.22; total 1.19. Hind claw 0.10. Hypopygium 0.78 x 0.65.

Variability. Length of body in females 3.3–4.2 mm, in males 2.9–3.8 mm. Head width in females 1.00– 1.20 mm, in males (0.85–) 0.90–1.16 mm. One reared female dwarfish: body 2.9 mm, head width 0.95 mm. Lamnium of lancet / head width: 0.725 / 1.05 = 0.69 (Kitee, the holotype)

Ovipositor sheath length 0.90–1.00 mm (mean 0.94 mm, n = 12). Ovipositor sheath / head width index 0.79– 0.90 (mean 0.85, n=12), larger values in small females.

Flight period. 129 females with known dates of capture from 12 biogeographical provinces of South Finland (from Varsinais-Suomi to Central Ostrobothnia) are in collections. If they are allocated to five day periods, the following distribution is found: May 17–21: 6, May 22–26: 11, May 27–31: 20, June 1–5: 28, June 6–10: 35, June 11–15: 22, June 16–20: 5, June 21–25: 2 females. Thus, a Gaussian distribution occurs with a peak in the second five day period in June. No females were found in July. Thus there is one generation per year, as thought by Vikberg (1965: 58).

Vikberg & Zinovjev (1999) wrote that there usually are two generations per year, but this is not true and was based on the specimens of Tubpontania nitidinota which were mixed with Pontania nudipectus . Nevertheless, the diapause in T. nudipectus is not obligatory because in 1963 some females were reared in July from larvae found earlier in the same year.

Sex ratio. The studied material from South Finland consists of 139 females and 139 males. The proportion of males is thus 50 per cent.

Host plant and larva. The gall on Salix phylicifolia and the larva of the species were described by Vikberg (1965).

Further observations of the galls: Janakkala, Punkka (6743:3374; no. 28 / 2001.

Janakkala, Kalpalinna, Kilparinne (6760:3370; rearing no. 31 / 2001), some 300 leaf-rolls on Salix phylicifolia were collected on 27.7.- 1.8.2001, about 250 cocoons were taken for overwintering; no adults were reared! Only one ichneumonid was obtained next spring.

Janakkala, Jaarli printing house (6761:3371; no. 17 / 2003).

Distribution. Finland, Norway, Russia, Sweden.

Material / specimens examined: Finland, V (= Varsinais-Suomi): Karjalohja, 1♀ 2.6.1964, leg. O. Ranin ( CVV). Sammatti, 1♂ 2.6.1954, leg. J. Kangas ( ZMH). Vihti, 1♀ 9.6.1952, 1♂ 10.6.1962, leg. V. J. Karvonen ( ZMH). Vihti, Siikajärvi, 1♂ 30.5.1960, 1♀ 21.6.1964, 1♂ 27.5.1965, 1♀ 7.6.1965, 4♂ 30.5.1966, 3♂ 4.6.1966, 2♀ 28.5.1967, 1♂ 4.6.1967, 1♀ 3.6.1968, 1♂ 8.6.1968, 5♂ 25.5.1969, 1♀ 11.6.1969, 3♀ 31.5.1970, 1♀ 6.6.1970, 1♀ 7.6.1970, 1♀ 13.6.1970, 1♀ 19.6.1970, 2♂ 29.5.1971, 1♂ 6.6.1971, 1♀ 26.5.1973, leg. V. J. Karvonen ( ZMH).

U (= Uusimaa): Espoo, 1♂ 24.5.1969, leg. V. J. Karvonen ( ZMH). Helsingfors, 1♀ 22.5.1966, 1♀ 30.5.1969, 1♀ 2.6.1969, leg. E. Lindqvist ( ZMH). Helsingin pitäjä, 1♂ 27.5.1962, 1♀ 19.5.1963, leg. J. Perkiömäki ( ZMH); 1♀ 30.5.1967, leg. V. J. Karvonen ( ZMH). Helsinki, 3♂. 1♀ 29.5.1968, 2♂ 2♀ 1.6.1968, 1♀ 7.6.1968, leg. M. Viitasaari ( CMV). Helsinki (6681:3396), 3♂ 18.5.1971, 15♂ 3♀ 24.5.1971, 3♂ 1♀ 1.6.1971, 8♂ 2♀ 3.6.1971, 1♀ 7.6.1971, (6681:3397) 1♂ 9.6.1971, (6681:3397) 1♀ 16.6.1971, leg. M. Viitasaari ( CMV). Helsinki, ymp. [= surroundings], 1♀ 24.5.1953, leg. Winter ( ZMH). Kirkkonummi, 1♀ 19.5.1963, leg. V. J. Karvonen ( ZMH). Kirkkonummi, Siikajärvi, 2♀ 13.6.1964, 1♀ 12.6.1965, 2♂ 30.5.1966, 1♀ 4.6.1967, 1♀ 26.5.1968, 1♂ 25.5.1969, leg. V. J. Karvonen ( CVV, ZMH). Pasila, 1♂ 18.5.1949, leg. V. J. Karvonen ( ZMH). Sibbo, 2♀ 31.5.1966, leg. E. Lindqvist ( ZMH).

EK (= South Karelia): Vehkalahti, 1♀ 25.6.1974, 1♀ 6.6.1975, 2♀ 5.6.1976, 5♂ 3♀ 9.6.1976, 2♀ 1.6.1977, leg. L. Tiensuu ( ZMH).

EH (= South Häme): Forssa, 1♀ 28.5.1963, 1♀ 18.6.1964, 1♀ 12.6.1968, leg. E. Nylund ( FNHM); 1♀ 3.6.1967, leg. M. Nylund ( FNHM). Hattula, 1♂ 1.6.1967, 1♀ 11.6.1967, 1♀ 14.6.1967, 1♀ 5.6.1968, 1♂ 1.6.1969, 4♂ 4♀ 9.6.1969, 1♀ 14.6.1969, 1♀ 5.6.1970, 14 31.5.1971, 1♂ 1♀ 28.5.1983, 4♂ 1♀ 18.6.1987, 1♂ 21.6.1987, (676:334) 2♂ 27.5.1989, (676:334) 1♂ 1♀ 6.6.1997, leg. M. Nuorteva ( CMN, CMV). Hattula, 1♂ 1♀ 2.6.1968, 12♂ 3♀ 1.6.1969, 2♀ 7.6.1969, 1♀ 8.6.1969, 3♂ 4♀ 9.6.1969, 1♂ 2♀ 10.6.1969, 3♀ 12.6.1969, 1♂ 1♀ 31.5.1970, 1♀ 3.6.1970, 1♂ 1♀ 5.6.1970, 1♀ 8.6.1970, 1♂ 11.6.1970, 1♂ 30.5.1971, 1♀ 15.6.1971, 2♂ 4.6.1972, 1♀ 19.6.1972, 1♀ 7.6.1973, 1♂ 8.6.1975, 1♀ 21.5.1984, 1♀ 1.6.1985, 1♂ 1♀ 2.6.1985, 1♂ 23.6.1985, 1♂ 7.6.1986, 4♂ 1♀ 6.6.1987, 2♀ 14.6.1987, 1♂ 29.5.1988, 1♂ 5.6.1988, 3♂ 3♀ 21.5.1989, 1♂ 3.6.1989, 1♂ 2♀ 22.5.1993, leg. J. K. Nuorteva (CJN, CVV). Hattula, Vuohiniemi (6763:3342), 1♂ 10.5.2000, 3♂ 27.5.2001, 1♂ 10.5.2002, 1♂ 29.5.2003, leg. J. Nuorteva (CJN). Jokioinen, 1♂ 1♀ 7.6.1968, leg. M. Nylund ( FNHM). Koijärvi, 1♀ 4.6.1964, leg. I. Petäjikkö ( FNHM). Pälkäne, 1♂ 3.6.1963, 1♀ 6.6.1963, leg. M. Viitasaari ( CMV). Pälkäne, Onkkaala, shore grove (6806:3353), 1♂ 31.5.1971, leg. M. Viitasaari ( CMV). Pälkäne, Ruotsila, Lakka brook grove (6801:3351), 1 ♀ 14.6.1964, leg. J. Kangas ( ZMH). Pälkäne, Sappee, Laippa (6816:3370), 2♀ 2.6.1983, leg. J. Kangas ( ZMH). Pälkäne, Tykölänjärvi (6798:3349), 1♀ 28.5.1984, leg. J. Kangas ( ZMH). Pälkäne, Töyräniemi, Ihanainen (6808:3361), 1♀ 13.6.1964, leg. J. Kangas ( ZMH). Pälkäne, Värilä meadow (6798:3355), 1♂ 4.6.1964, 1♀ 23.5.1984, leg. J. Kangas ( ZMH). Somerniemi, 1♀ 10.6.1965, leg. J. Kuusinen ( FNHM). Tammela, 1♀ 5.5.1964, leg. M. Loikkanen ( FNHM); 1♀ 2.6.1972, leg. M. Nylund ( FNHM). Tampere, 1♀ 22.5.1964, 2♀ ex larva on Salix phylicifolia in 1964, leg. V. Vikberg ( CVV).

PS (= North Savo): Juankoski, Haaramäki (7017:3569), 1♀ 8.6.1995, leg. M. Nuorteva ( CMN). Juankoski, Jouhteninen (6999:3562), 1♂ 2♀ 11.6.1994, leg. J. Nuorteva (CJN). Juankoski, Koiramäki (6992:3563), 3♂ 1♀ 9.6.1996, leg. J. Nuorteva (CJN). Nilsiä, Kalkkiruukki (7013:3550), 1♂ 2♀ 13.6.1994, leg. J. Nuorteva (CJN); (7012:3550), 1♀ 29.5.2000, leg. M. Nuorteva ( CMN). Nilsiä, Laitisenmäki (7006:3551), 3♀ 8.6.1996, leg. J. Nuorteva (CJN). Nilsiä, Pajustenranta (7016:3552), 2♀ 30.5.2000, leg. J. Nuorteva (CJN). Nilsiä, Petäjäjärvi (7015:3542), 1♂ 30.5.2000, leg. J. Nuorteva (CJN). Nilsiä, Rasimäki (7023:3566), 1♂ 31.5.2000, leg. J. Nuorteva (CJN); 1♀ 31.5.2000, leg. M. Nuorteva ( CMN). Nilsiä, Syvärinranta (7025:3549), 1♀ 11.6.1994, leg. M. Nuorteva ( CMN). Nilsiä, Tahkomäki (7023:3550), 1♂ 7.6.1996, 1♂ 30.5.2000, leg. J. Nuorteva (CJN).

PK (= North Karelia): Kitee, Papinniemi, ex larva Salix phylicifolia 1963 , 1♀ (holotype) emerged 18.7.1963, 4♀ emerged 20.7.- 3.8.1963, leg. T. Kontuniemi ( CMV, CVV, ZMH); 1♀ emerged in May 1964, leg. J. Kangas ( ZMH); 1♀ emerged in May 1964, leg. J. Perkiömäki ( ZMH). Pyhäselkä, 1♂ 1.6.1963, leg. V. Vikberg ( CVV).

EnL (= Enontekiö Lapland): Kilpisjärvi, 1♀, leg. W. Hellén ( ZMH). Kilpisjärvi, Saana, 1♂ 1.7.1949, leg. Grönvall ( ZMH). Kilpisjärvi, 1♂ 30.6.1964, leg. V. J. Karvonen ( ZMH); 1♂ 3.7.1968, leg. V. Vikberg ( CVV).

InL (= Inari Lapland): Inari, 2♀ 26.6.1969, leg. V. J. Karvonen ( ZMH). Utsjoki, 1♀, leg. R. Frey ( ZMH). Utsjoki, 1♀ 5.7.1967, leg. V. J. Karvonen ( ZMH). Utsjoki, Kuoppaniva, 1♂ 12.6.2003, leg. J. Nuorteva (CJN). Utsjoki, kk. (= Mantojärvi), 1♀ 11.6.1960, 1♀ 17.6.1960, leg. V. Vikberg ( CVV); 1♂ 18.6.1960, leg. O. Ranin ( ZMH). Utsjoki, Outakoski, 1♀ 20.6.1947, leg. W. Hellén ( ZMH); 1♀ 25.6.1947, leg. E. Lindqvist ( ZMH). Utsjoki, Pulmanki, 1♀ 14.7.1951, leg. Y. Kangas ( ZMH).

Norway. S.-Trondelag, Dovrefjell, 1♀ 1♂ (reared specimens), leaf-rolls (SZ 1 / 2001) on Salix phylicifolia were taken on 26.7.2001 and the specimens emerged in May 2002. They were identified as Ph. nudipectus by Kopelke ( FNMS).

Russia, Karelian Republic, Suoju, 1♀ 31.5.1943, leg. W. Hellén (ZMH). Murmansk oblast: Liinahamari, 5♂ 1♀, 13.7.1935, leg. Th. Grönblom (CMV, CVV, ZMH), female labelled Nematus anomalopterus Först. ♀ O. Conde det. 1939. Petsamo, 1♀ 8.7.1929, leg. Håkan Lindberg (ZMH).

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).