Caribena versicolor [molt sexing]
@boina Is it male in this photo because of the whitish quite straight, horizontal line between the book lungs? or??? just trying to learn how to sex these.
 
@Nicky Davis Lack of spermathecae is one thing, but they can be folded in sometimes and not be easy to see. What makes this an obvious and doubtless male is the field of epiandrous fusillae - the light triangular patch in the darker field between the book lungs.

It's the overall appearance, though. Females not only have spermathecae and utereus externus but also a bursa copulatrix that is usually very easy to see and lacking here. They also have a wider and more obvious furrow. There are actually plenaty of differences.

That's a pretty good pic, btw. :)
 

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Spermathecae sexing (Molts)
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Nicky Davis
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Device
Canon Canon EOS 20D
Aperture
ƒ/16
Focal length
100.0 mm
Exposure time
1/250
ISO
200
Filename
t_caribena_versicolor_molt_28oct2017_2189_6.jpg
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543.2 KB
Date taken
Sat, 28 October 2017 10:32 AM
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900px x 607px

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