Brachypelma albopilosum [molt sexing]
Can someone please sex this for me? It is a brachypelma albopilosum.
I third male. Not only are the male organs visible, but the light coloured patch behind them indicates epiandrous fusillae.
@ccTroi ok so I must be off I am second guessing what I thought my last few molts were. I thought the 2 bumps where spermatheca. What are the male organs? I need someone to point me to a pic or diagram that will help me see the difference.
I thought I was seeing the spermatheca as in this image of my p Victori molt. Am I correct on my molt?
@Noah Blades Female spermathecae are fused together, and they have a very prominent uterus externus, in this species. It isn't like species where the female spermathecae are tube-like and they have a less obvious 'flap'. There are definitely species where it is far more difficult to tell if they are male, or female, organs - Thrixopelma is one of them. This species is much easier because of the structure of the spermathecae being very different.
Male organs are two, almost perfectly round, little circles spaced far apart and there is no sign of a uterus externus.
All of the below photos are in my album here and properly labeled for comparison purposes.
Female - 3"

Female - 4"

Male - 3"

Penultimate male - ~4"
@Noah Blades You cannot compare Psalmopoeus spermathecae to Brachypelma - they are worlds different in their structure. That is why it is so important for people to include the species in this gallery. Spermathecae is very particular to each genus and can even differ significantly right down to a species level.
Psalmopoeus spermathecae are very tube like and are not fused together. Yes, your Psalmopoeus does look female.

Media information

Spermathecae sexing (Molts)
Added by
Date added
View count
Comment count
0.00 star(s) 0 ratings

Image metadata

samsung SM-G950U
Focal length
4.3 mm
Exposure time
File size
2.4 MB
Date taken
Mon, 20 May 2019 3:53 PM
4032px x 3024px

Share this media