Posted by Jessica on 28-06-2024 20:08
#1
Hello,
I saw this male on a
Centaurea jacea. So may be
Chaetorellia jaceae ?
But in France we have
Chaetorellia acrolophi, Chaetorellia hestia, Chaetorellia loricata and
Chaetorellia succinea...
How can I distinguish them ?
Jessica Joachim : France : Mazères : 09270 : 28/06/2024
Altitude : 243 m - Taille : 5-6 mm environ
Réf. : 345128
Edited by Jessica on 04-07-2024 16:45
Posted by Nosferatumyia on 29-06-2024 11:34
#2
ID is difficult, indeed. There is an article by White and Marquardt (1989), with a key, which has not been updated since then. Reddish vittae on mesonotum and 4 pairs of black dots are in C. jaceae and C. acrolophi, but the latter, as well as C, australis is generally smaller and has more pependicular 2nd and 3rd crossbands (oblique in C. jaceae).
More precise ID requires females, dissections and measurements, or exact association with host plant (C. jacea). So this is certainly
C. jaceae.
Edited by Nosferatumyia on 29-06-2024 11:35
Posted by Jessica on 04-07-2024 16:44
#3
Hi,
Sorry for the late answer !
And thank you very much for explanations