Two Chrysididae to identify

Two Chrysididae to identify

Postby Galatea on 23 Sep 2017, 21:10

Hi everyone :D

Castelfranco di Sopra (Arezzo, Tuscany), 20-07-2017.


First one.
Attachments
crisididae 5.JPG
Crisididae 4.JPG
Crisididae 3.JPG
Crisididae 2.JPG
Crisididae 1.JPG
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Re: Two Chrysididae to identify

Postby Galatea on 23 Sep 2017, 21:13

Second one.
Attachments
crisididae 7.JPG
Crisididae 8.JPG
Crisididae 6.JPG
Federica
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Re: Two Chrysididae to identify

Postby piros on 24 Sep 2017, 10:21

The second is C. grohmanni, female.

Greetings,

Henrik
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Re: Two Chrysididae to identify

Postby Galatea on 25 Sep 2017, 19:03

Thanks. And the first? Not even the genus?
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Re: Two Chrysididae to identify

Postby Alex on 26 Sep 2017, 00:56

The first is also a Chrysis, a male in the comparata-group of species I would say. Do you have any pictures showing the "teeth" on the hind margins of the abdomen - its a very important character for almost all Chrysididae.
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Re: Two Chrysididae to identify

Postby Galatea on 26 Sep 2017, 15:35

These are the last pictures I have, unfortunately.
Attachments
ancora crisidide.JPG
Ancora crisidide 3.JPG
Ancora crisidide 2.JPG
Federica
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Re: Two Chrysididae to identify

Postby Alex on 26 Sep 2017, 17:14

The first would have been great if it was for the motion blur sadly, but a good candidate is Chrysis marginata
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Re: Two Chrysididae to identify

Postby Galatea on 27 Sep 2017, 00:23

Alex wrote:The first would have been great if it was for the motion blur sadly, but a good candidate is Chrysis marginata


Great, thanks again Alex! Searching for some pictures of this species, I noticed that the coloration of the abdomen varies a lot: some individuals are intensely red, while others - like mine - have yellowish/greenish reflexes and almost no red at all. Is it a matter of subspecies, sex or what else?
Sorry for what may be a silly question, but I know nothing about this difficult family.
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Re: Two Chrysididae to identify

Postby Alex on 27 Sep 2017, 19:41

Its not an unreasonable question at all!

There is a bit of variation between individuals of the same species, and little between the sexes (when they arent completely different that is). Males of the ignita-complex tend to be slightly more intensive/dark than females for example. Most of the times the "colour scheme" stays basically the same, but the shade of the colours can change, for example in a species that is usually blue and red there can occur specimens that are green and orange as well. Or darker specimens which would be purple/black and dark red/magenta.

Since the colours are created structurally, and not by pigments, they also change as the collected specimen dries. The multireflector-layers shrink when they dry, and so the colour that is reflected shifts to shorter wavelengths, green to blue, red to orange, yellow to green etc.
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Re: Two Chrysididae to identify

Postby Galatea on 28 Sep 2017, 01:32

Clear and exhaustive: thank you so much, Alex! Now I know something more about these splendid little jewels of Nature :wink:
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