Penultimate Male Brachypelma albopilosum - 5"
Can you tell by the exuvium that a male is penultimate? I have always wondered how people knew...
 
@ErinM31 He hooked out with this moult. That makes the exuvia the one he was in just before he matured - making it the penultimate exuvia.
 
@VanessaS Ahhh. Often I see want-to-buy ads for penultimate males and I’ve been meaning to ask how people know the T is one molt away from maturing.
 
@ErinM31 I don't know how they know either. Unless they don't realize that penultimate means the one directly before the last one. Maybe they think that it means the same as immature?
 
@ErinM31 @VanessaS Penultimate is always technically a guess, but when a male is close to its maturing size, it's listed as penultimate, meaning the dealer suspects it will mature with its next molt.

Interesting accessory organs in this pic!
 
I wouldn't want to guess at that. Some species can be very difficult to guess at. I wouldn't even try to guess when my B.hamorii will mature. Even if you are one moult off in your guess - it could mean up to another year before they mature.
Nope, I'm not guessing. Mature or immature, along with size, and I'll let someone else guess.
 

Media information

Category
Spermathecae sexing (Molts)
Added by
Vanessa
Date added
View count
813
Comment count
6
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Image metadata

Device
SONY SLT-A57
Aperture
ƒ/11
Focal length
50.0 mm
Exposure time
1/160
ISO
100
Filename
DSC09989-2.jpg
File size
584.7 KB
Date taken
Wed, 25 October 2017 9:00 AM
Dimensions
967px x 791px

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