what could this be?

Gestart door DJHiker, augustus 31, 2014, 15:17:14 PM

Vorige topic - Volgende topic

DJHiker

Larva?, caterpillar?
It is hanging from a leaf.
Does anyone recognize this?
Location: Stara Platina, Bulgaria
Date: 25-06-2013
Thanks in advance,
David
David Kohl

jck

Have you considered one of the Coleophoridae?

James

DJHiker

#2
Well, up until now I didn't  ;)
Many pictures of Coleophoridae larva cases can be found on Lepiforum.de  http://www.lepiforum.de/lepiwiki.pl?Fotouebersicht_Coleophoridae_Raupen.
Amid all of those, there is only one that looks similar to the one on my photo: Coleophora vibicella (page 13).
However, the end of the case is not rolled in as shown on various images of Coleophora vibicella that I find on the web. I understand that this roll-in is a remnant of the youth case. What would be the implication of the case end not being rolled in?  Does it rule out Coleophora vibicella as a possible candidate?
Thanks and regards,
David
David Kohl

jck

Maybe time for your topic to be transferred to Microvlinders - they have a special subforum Zakdragers en Kokermotten - or to Butterflies outside the Netherlands. What may help: there is an excellent site, Bladmineerders.nl, which also has Coleophoridae but you have to begin with the correct plant genus. I saw on Lepiforum that C. vibicella lives on Genista and the plant on your photo doesn't look very like a Genista?

James

DJHiker

Looking more closely at the photo I can see that the remnant of the youth case is there, only partially visible because it's hidden behind the tube.
Regarding food plants for Coleophora vibicella, the Vlaamse Vereniging voor Entomologie lists the following: Chamaespartium sagittale, Genista tinctoria, Vicia cracca, Vicia hirsuta, Vicia sativa subsp. nigra and Vicia sepium http://www.bladmineerders.be/nl/content/coleophora-vibicella-h%C3%BCbner-1813. While Wikipedia https://en.wikipedia.org/wiki/Coleophora_vibicella lists Chamaespartium sagittale, Genista tinctoria and Vicia species.
So apparently Genista is not the only food plant for the Coleophora vibicella larva. Unfortunately I am a total dummy when it comes to plants, so I have difficulties identifying the plant on my photo. On the other hand, I haven't been able to find another Coleophoridae sp. with a similar looking tube.
Comment is appreciated.

Regards,
David
David Kohl