Tubpontania nitidinota, Vikberg, Veli, 2010

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 : 20-22

Tubpontania nitidinota sp. nov.

Figs 7, 8 , 16, 17 .

Description. Female. Description of the holotype female from Nilsiä, Syvärinranta: Head, including antenna, black. Ocelli red. Lateral parts of clypeus anteriorly brownish. Base of mandible brownish yellow, apex amber red. Labrum brownish yellow. Malar space narrowly brown near mandible. Palpi brownish – piceous. Thorax black. Tegula brownish yellow. Lateral pronotum black (left) or slightly margined with brown (right). Prepectus partly and upper part of mesepimeron brown. Wings slightly yellowish infumate. Costa brownish yellow, stigma pale, its hind margin brown. Veins brownish yellow to pale brown. Coxae black, slightly yellowish apically. Trochanters and trochantelli brownish yellow. Bases of fore and midfemora blackish, apically brownish. Hind femur black, only apical 0.2 brown. Tibiae yellowish brown, apically narrowly piceous. Apical 0.3 of hind tibia blackish. Tarsi brownish, hind tarsus completely blackish. Abdomen black, cercus yellowish. Basal plate mostly yellowish.

Frontal pit broad, oval. Frons tuberculate, without wrinkles. Mid-lobe of mesoscutum medially with faint sculpture, shining. Upper mesepisternum with weak alutaceous sculpture, shining. There is a glabrous longitudinal area between two lower thirds of mesepisternum. Basal terga medially alutaceous, shining. Tergum 3 medially with sparse hairs (their interspaces larger than length of hairs), medial line glabrous. Sawsheath ( Fig. 7 ): upper margin with one short seta on right side near long, curved setae.

Measurements of the holotype female: Body 4.5. Fore wing 4.4, costa 2.4. Head width 1.24, head height 0.87, head length 0.70. Malar space 0.10. Intertorular distance 0.17. Compound eye 0.52 x 0.36. Distance between eyes on frons 0.83, on face 0.80. POL 0.27, OOL 0.25, OD 0.08. Postocellar area 0.15 x 0.45. Flagellomeres 1–7: 0.48 (height 0.11), 0.46, 0.42, 0.35, 0.31, 0.30, 0.35 (height 0.07); total 2.67. Hind femur 1.30, height 0.25. Hind tibia 1.46, apical width 0.19, inner hind spur 0.25, outer spur 0.20. Hind tarsomeres 1– 5: 0.57, 0.21, 0.15, 0.09, 0.24; total 1.26. Hind claw 0.12. Ovipositor sheath 0.94. Sawsheath 0.46 x 0.15. Cercus 0.15 x 0.05. Lamnium of lancet 0.72, with 18 segments.

Measurements of the paratype female of Tubpontania nitidinota from Pietarsaari; this specimen has asymmetric flagella, both with 8 flagellomeres. Body 4.2. Fore wing 4.3, costa 2.5. Head width 1.23, head height 0.86, head length 0.67. Malar space 0.11. Intertorular distance 0.15. Compound eye 0.53 x 0.37. Distance between eyes on frons 0.81, on face 0.79. POL 0.26, OOL 0.25, OD 0.07. Postocellar area 0.14 x 0.40. Flagellomeres 1–8: Left antenna 0.44 (height 0.12), 0.46, 0.40, 0.34, 0.30, 0.28, 0.25 (height 0.08), 0.15; total 2.62; right antenna 0.45 (height 0.11), 0.45, 0.41, 0.34, 0.31, 0.30, 0.26 (height 0.08), 0.27; total 2.79. Hind femur 1.25, height 0.26. Hind tibia 1.37, apical width 0.18, inner hind spur 0.25, outer spur 0.22. Hind tarsomeres 1–5: 0.55, 0.21, 0.16, 0.08, 0.24; total 1.24. Hind claw 0.15. Ovipositor sheath 0.90. Sawsheath 0.49 x 0.16. Cercus 0.17 x 0.07. Lamnium of lancet 0.66, with 20 segments.

Further description. Female. Lancet ( Fig. 17 ): radix with a group of 5–9 pores and no isolated pores, lamnium with 18–20 segments, apically slightly curved, annulus 2 with 13–17 ctenidial spines, ctenidial spines on annuli 3–5 long, not reaching aulax. Tooth 10 from base ( Fig. 16 ) with 12–15 rather small serrulae, with basal third not elevated, postcalcar shallow, acute or obtuse, rounded, cypsella long, not emarginated, forming obtuse angle with tooth.

Variability. Length of body in females 2.9–4.5 mm. Head width in females 0.91–1.24 mm.

Ovipositor sheath length 0.79–0.95 mm (mean 0.88 mm, n = 25). Ovipositor sheath / head width index 0.73–0.86 (mean 0.78, n=25), larger values in small females and smaller values in large females.

Lamnium of lancet / head width: 0.605 / 1.15 = 0.53 (Pälkäne 16.6.1959), 0.655 / 1.19 =0.55 (Pälkäne, ex larva 5.6.1975),0.705 / 1.21 = 0.58 (Vihti, Siikajärvi 5.6.1971), 0.72 / 1.23 = 0.58 (Nilsiä, Syvärinranta 13.7.1994).

Note. The reared females from Pälkäne, Kemmo are atypical; the long subapical hairs in sawsheath are only slightly curved and directed more backwards than usual ( Fig. 8 ) but the other characters and also structure of lancet fit this species.

Male. Unknown.

Flight period. 52 females with known dates of capture from 12 biogeographical provinces (Varsinais- Suomi to Central Ostrobothnia) in South Finland are in collections. If they are allocated to five day periods, the following distribution is found: May 27–31: 3, June 1–5: 6, June 6–10: 4, June 11–15: 9, June 16–20: 8, June 21–25: 4, June 26–30: 3, July 1–5: 5, July 6–10: 5, July 11–15: 8 females. A distribution is thus found with one peak in the first half of June and one peak near the middle of July. There are therefore two generations per year.

Sex ratio. From South Finland the studied material consists of 59 females. The male is still unknown.

Host plant. Two times one or several females have been reared from leaf-rolls on Salix phylicifolia . The female from Hämeenlinna was swept from Salix phylicifolia , but other species of Salix grew near, e.g. Salix cinerea . The female from Janakkala, Leppälampi was swept on a lake shore with numerous bushes of Salix cinerea , but other willow species ( Salix aurita , S. phylicifolia and S. myrsinifolia ) were also present. The female from Janakkala, Suurisuo was captured in a pine bog with large area of Salix aurita nearby, but also single bushes of S. cinerea were present. Possible additional host plant could be S. aurita , or S. cinerea , but neither of them is confirmed by rearing. The characters of the larva are unknown.

Distribution. Finland, Russia (Leningrad oblast), Sweden.

Material / specimens examined: Holotype female: Finland (” Suomi ”), PS (= North Savo), Nilsiä, Syvärinranta (7025:3549), 1♀ 13.7.1994, leg. J. Nuorteva; saw preparation 743 VV ( ZMH).

Paratypes: Finland, V (= Varsinais-Suomi): Lojo, 1♀ 11.6.1918, leg. Håkan Lindb[erg] ( ZMH); labelled Nematus (Pont.) anomalopterus Först. O. Conde det. 19xx. Vihti, 1♀ 29.5.1960, 1♀ 4.6.1960, leg. E. Karvonen ( ZMH). Vihti, 1♀ 14.6.1959, leg. V. J. Karvonen ( ZMH). Vihti, Siikajärvi, 1♀ 7.6.1964, 1♀ 5.6.1965, 1♀ 30.5.1966, 1♀ 24.6.1966, 1♀ 5.6.1971, 1♀ 7.7.1974, leg. V. J. Karvonen ( ZMH).

U (= Uusimaa): Helsinge, 1 ♀, leg. W. Hellén ( ZMH). Helsinge, 1♀ 6.6.1959, 1♀ 15.6.1968, leg. E. Lindqvist ( ZMH). Helsingfors, 1♀ 18.6.1965, 1♀ 30.5.1969, leg. E. Lindqvist ( ZMH). Helsinki, 1♀ 17.6.1968, leg. M. Viitasaari ( CMV). Helsinki, Lapinlahti, 1♀ 19.6.1962, leg. J. Perkiömäki ( ZMH). Kirkkonummi, Siikajärvi, 1♀ 3.6.1962, leg. E. Karvonen ( ZMH); 1♀ 13.6.1964, leg. V. J. Karvonen ( ZMH). Munksnäs, 1♀ 25.6.1970, 1♀ 10.7.1970, leg. E. Lindqvist ( ZMH). Tvärminne, 1♀, leg. Suomalainen ( ZMH).

St (= Satakunta): Karkku, Pappilansaari, 1 ♀ 7.7.1952, leg. W. Hellén ( ZMH). Kauvatsa, 1♀ 16.6.1934, leg. R. Elfving ( ZMH), labelled Nematus anomalopterus Först. ♀ O. Conde det. 1939.

EH (= South Häme): Hämeenlinna, Miemala (6761:3365), 1♀ 5.7.2009 on Salix phylicifolia , leg. V. Vikberg ( CVV). Hartola, 1♀, leg. L. v. Essen ( ZMH). Hattula, 1♀ 11.6.1967, 1♀ 25.6.1975, leg. M. Nuorteva ( CMN). Hattula, 1♀ 13.6.1968, 1♀ 13.7.1968, 1♀ 9.6.1971, 1♀ 3.7.1974, 1♀ 8.6.1986, 1♀ 15.6.1986, leg. J. K. Nuorteva (CJN). Hattula, Vuohiniemi (6763:3342), 1♀ 2.6.2002, leg. J. Nuorteva (CJN). Hattula, Vuohiniemi (676:334), 1♀ 17.6.2002, leg. M. Nuorteva ( CMN). Janakkala, Leppälammi (6766:3379), 1♀ 4.7.2009, leg. V. Vikberg ( CVV). Janakkala, Suurisuo (6766:3381), marsh, 1♀ 23.6.2009, leg. V. Vikberg ( CVV). Pälkäne, Kemmo (6798:3354), 3♀, ex larva on Salix phylicifolia , rearing no. 20 / 1974, emerged in June 1975, leg. J. Kangas ( ZMH). Pälkäne, Onkkaala, shore grove (6806:3353), 1♀ 5.6.1969, leg. M. Viitasaari ( CMV). Pälkäne, Ruotsila, Lakka brook grove (6801:3351), 1♀ 16.6.1959, leg. V. Vikberg ( CVV). P.-Pirkkala, 1♀ 30.6.1940, leg. Th. Grönblom ( ZMH). Somerniemi, 1♀ 14.7.1964, leg. J. Kuusinen ( FNHM). Somero, 1♀ 11.7.1964, leg. J. Kuusinen ( FNHM).

ES (= South Savo): Valkeala, Utti, 1♀ 27.6.1940, leg. V. J. Karvonen ( ZMH).

LK (= Ladoga Karelia): Parikkala, Laurila, 1♀ 16.6.1945, leg. W. Hellén ( ZMH). Parikkala, Tiviä, 1♀ 12.6.1945, leg. W. Hellén ( ZMH).

PS (= North Savo): Nilsiä, Kinahmi, 1♀ 13.7.1994, leg. J. Nuorteva (CJN). Nilsiä, Sänkimäki (7009:3545), 2♀ 10.7.1995, leg. J. Nuorteva (CJN). Nilsiä, Syvärinranta (7029:3545), 1♀ 1.7.1993, leg. J. Nuorteva (CJN). Nilsiä, Syvärinranta (7025:3549), 2♀ 13.7.1994, leg. J. Nuorteva (CJN). Nilsiä, Tahkomäki (7023:3550), 1♀ 13.7.1994, leg. J. Nuorteva (CJN).

PK (= North Karelia): Polvijärvi, 1♀ 18.6.1945, 1♀ 27.6.1945, leg. M. Pohjola ( CMV, ZMH).

KP (= Central Ostrobothnia): Pietarsaari (707:328), 1♀ 3.7.1981, leg. J. Kangas ( ZMH)

PeP (= Outer Ostrobothnia): Kemi, 1♀ 14.6.1964, leg. O. Ranin ( CVV). Kemijärvi village, 1♀ 31.6.1951, leg. Håkan Lindberg ( ZMH).

Russia, Leningrad oblast: Pyhäjärvi, 1♀ 16.6.1920, leg. W. Hellén ( ZMH). Vaaseni, Svir, 1♀ 15.6.1942, leg. V. J. Karvonen ( ZMH).

Sweden, Lycksele lappmark, Storuman, 1♀ (reared specimen), the leaf-roll (SZ 22 / 2004) on Salix phylicifolia was taken on 8.8.2004 and the female emerged in April 2005. The specimen (body 3.5, head width 1.07 mm) is complete. It was identified as Ph. nudipectus by Kopelke (FNMS).

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.