Biblio.
- Benson 1 : RES - Handbooks ... Symphyta ... Vol. VI 2(b) - 1952
- Benson 2 : Bull. British Museum ... Vol. 22 n°4 - 1968 - Hymenoptera from Turkey - Symphyta
- Berland : Faune de France ... Vol. 47 - Hyménoptères Tenthredoïdes - 1947
- Blank & Ritzau : Die Tenthredopsini Deutschlands (in Pflanzenwespen Deutschland ... Edit. Goecke & Evers - 1998)
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Ciao,
# 4424 captured at an altitude of about 410 m in Cne : Anost (Dépt. Saône-et-Loire) - 20.05.2008 . Length : about 9.4 mm
We use the keys (which I already sent to the forum) here after :
download/file.php?id=47394&mode=view and download/file.php?id=47396&mode=view
We find that it is a Tenthredininae .
According to Benson 1 p.109/112 : we are in the presence of a tenthredopsis, because :
- The 1st tergite does not have a medial furrow, but a medial ridge whose cross section is clearly triangular (which I could not photo because of the poor quality of my camera)
- The form of the clypeus (to see my photo).
The capture is thus a Tenthredopsis ♂ .
The tergite 8 of this Tenthredopsis is depressed marginally (I could not make photo) .
According to Blank & Ritzau p.234 : we are in the presence (thing understoud) of the nassata-group (sensu Benson).
It is now that the difficulties start : The specialists are not more in agreement , because the hindwing of this Tenthredopsis does not have a marginal vein .
For some the absence of this vein is enough to indicate T. coqueberti, for the others this criterion is not sufficient :
- According to Blank & Ritzau p.238 : other species of the nassata-group can have this characteristic .
- According to Berland p.150 and Benson 2 p.161 : T. coqueberti is a form of T. nassata
Finaly ;
The white color of tarsus 3 also posing a problem , I can be more precise only :
Tenthredopsis nassata-group (Benson 1968) var. coqueberti (Klug 1817) ♂
T. coqueberti vivono anche in Italia (to see : Masutti L. e Pesarini F. - 1995)
… Avete un parere ?
Saluti.
D & JP Balmer
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