Pristiphora (Pristiphora) rufipes Serville, 1823

Macek, Jan, 2016, Descriptions of larvae of the Pristiphora thalictri group of the Czech Republic (Hymenoptera: Symphyta: Tenthredinidae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 785-794 : 789-791

Pristiphora (Pristiphora) rufipes Serville, 1823

( Figs 2 , 4 , 8 , 10 )

Pristiphora rufipes Serville, 1823: 75 (original description).

Pristiphora alnivora: TORKA (1934) :301 –304 (larval development); LORENZ & KRAUS (1957): 190 (larval description, host plant); KONTUNIEMI (1960): 72 (host plant).

Pristiphora rufipes: LACOURT (1999) :219 (host plant); HELLRIGL (2007): 223 (larval development, host plant); LISTON (2011): 191 (host plant).

Pristiphora aquilegiae: LISTON (1995) : 131 (host plant); TAEGER et al. (1998): 114 (host plant).

Material examined. CZECH REPUBLIC: BOHEMIA centr.: Louny distr., Cikánský dolík NR (5749), 28.v.2015, 12 larvae on Aquilegia vulgaris, J. Macek lgt. & det. ( NMPC).

Description of the last instar larva. Body length 12–13 mm. Colour. Head yellow green, with brownish reticulate texture on vertex; trunk green with translucent dark blood vessel margined by white strips of fat body.

Morphology. Head with scattered erect setae; clypeus with four setae, labrum symmetrical, deeply emarginated anteriorly, with four setae; mandibles with one seta; stipes with no setae; palpifer with two setae; the second segment of palpus with one seta; trunk cuticle finely granulose; prothorax (four annulets): first annulet with 3+3 setae, second annulet with 9–10 setae, fourth annulet with 4 setae, lateral lobe with 3 setae, suprapedal lobe with 2–4 setae; mesothorax (four annulets): first annulet with 6 setae, second annulet with 8 setae, lateral lobe with 6–7 setae, suprapedal lobe with 3–5 setae; metathorax (four annulets): first annulet with 4 setae, second annulet with 6 setae, third annulet 10 setae, lateral lobe with 6–7 setae, suprapedal lobe with 4 setae; abdominal segments (III–VII) (six annulets): second annulet 7–8 setae; fourth annulet 8–10 setae; first postspiracular lobe with 3 setae; second postspiracular lobe with 3 setae; subspiracular lobe with 4–5 setae; suprapedal lobe with 3–6 setae; supraanal and subanal lobes with scatterd long setae.

Notes on identification. Compared to Pristiphora sareptana , the larvae of P.rufipes differ in the absence of the black basal rings surrounding the setae on the thorax and lateral lobes of trunk segments ( Figs 8a,b ), as well as in oligophagy on columbines ( Aquilegia spp. ).

Bionomics. Habitat: mesophilous species, inhabiting deciduous and mixed forests, meadows, forest clearings, forest paths, parks, gardens; bivoltine/trivoltine; flight period from April to September; larval period from the end of April to September. Host plants: columbines ( Aquilegia spp. ) including garden cultivars ( LACOURT 1999, LORENZ & KRAUS 1957); e.g., Aquilegia atrata ( LISTON 2011) , A. coerulea ( HELLRIGL 2007) , A. chrysantha ( TORKA 1934) , A. flabellata ( HELLRIGL 2007) , A. olympica ( LISTON 2011) , A. vulgaris ( KONTUNIEMI 1960, TAEGER et al. 1998, HELLRIGL 2007). Mature larvae build a solid cocoon covered with soil particles, in which they also hibernate.

Discussion. The larva was described in detail by LORENZ & KRAUS (1957), the larval development by TORKA (1934) and HELLRIGL (2007). A redescription of the larva is provided here to facilitate comparison with the other Pristiphora larvae treated here.

Distribution. Palaearctic: Austria, Belgium, Bulgaria, Czech Republic, Estonia, Finland, France, Germany, Great Britain, Hungary, Italy, Latvia, Luxembourg, Macedonia, Netherlands, Norway, Poland, Romania, Russia, Slovakia, Spain, Switzerland. Introduced to Canada ( TAEGER & BLANK 2011).

Figures

Figs 1–3. Live last instar larvae: 1 – Pristiphora sareptana Kuznetzov-Ugamskij, 1924; 2 – P.rufipes Serville, 1823; 3 – P. thalictri (Kriechbaumer, 1884). Scale bar: 10 mm.

Figs 4–6.Adults reared from larvae (a – female, b – male): 4 – P.rufipes Serville, 1823; 5 – P. sareptana Kuznetzov- Ugamskij, 1924; 6 – P. thalictri (Kriechbaumer, 1884). Scale bar: 5 mm.

Figs 7–9. Mounted last instar larvae from alcohol (a –, anterior part, b – 2nd and 3rd abdominal segment): 7 – P.sareptana Kuznetzov-Ugamskij,1924; 8 – P.rufipes Serville,1823; 9 – P.thalictri (Kriechbaumer, 1884). Scale bar:3 mm.

Figs. 10–12. Genitalia of reared adults (a – penis valve, b –