Spermathecae Resource Thread

[Talkenlate04]

These arent really clear but his is a ventrical shot of my Curly Hair Tarantula (Brachypelma albopilosum)..Can this guy / gal be sex correctly?..I was thinking male.....(one of the dummies :? )

Male all the way.

 

[Luca Torelli]

Hello to all, this is my first post here...

Acanthoscurria Brocklehursti female:

Brachypelma Boehmei female:

thanks

 

[YouLosePayUp]

Here's some guaranteed ventral shots. The problem comes with some of the males being mature(the look changes a lot)

Brachypelma auratum juvenile female:

Brachypelma auratum juvenile male:

Brachypelma vagans female:

G. grossa appearing male:

H. minax Female:

P. cambridgei Female:

 

[SuperRad]

Tibial Hooks

It seems like this would be a much easier sure fire way to tell a male from a female.

Are there species that don't have tibial hooks on the males? Are there females that might have weird legs that have hook like parts? It just seems that most ppl prefer to ventrally sex or check out molts to tell. I would think hooks were the way to go every time.

 

[Truff135]

It seems like this would be a much easier sure fire way to tell a male from a female.

Are there species that don't have tibial hooks on the males? Are there females that might have weird legs that have hook like parts? It just seems that most ppl prefer to ventrally sex or check out molts to tell. I would think hooks were the way to go every time.

Hooks and palpal bulbs only appear on mature males, meaning when they've had their ultimate molt. Up until then, pre-ultimate male tarantulas can look just like a juvenile/sub-adult female tarantula. Some have said that pre-ultimate males look "leggier" than females, but that isn't any sort of guarantee. Ultimately, the best way to discern pre-ultimate male from female is via exuvium.
Additionally, I have heard of a couple of species of tarantula where even the mature males do not develop the tibial hooks. I'm not sure which species these are (or how many exist), but perhaps someone else can enlighten us?
I have not heard of a single individual tarantula, or even any species, where the female develops anything even close to a hook. Perhaps some sort of deformity could occur rarely, but even then it would have to be on both legs which would be even more rare.
Hope this answered your question!

 

[Tunedbeat]

Spermathecea,

 

[BCscorp]

female GBB

 

[barabootom]

male parahybana exuvium

male parahybana ~7

 

[barabootom]

Adult female Grammostola iheringi ~7

 

[xhexdx]

B. boehmei male:

H. incei male and two females, in that order:

 

[nulir]

B. albopilosum

 

[Hobo]

Female N. chromatus, ventral and molt:

 

[Hobo]

Probably not needed, but Here are a female B. smithi, Vent shot and exuvium.
The exuvium is about 3" DLS.

Ventral:

Exuvium:

 

[TheHolyToast]

Yes the white dot is a male trait.

The "white dot", and also the "triangle" you hear mentioned may have some truth to them, but I wouldn't base an opinion on them alone.

4" P. regalis - confirmed female

4" L. Parahybana - confirmed female

 

[Mack&Cass]

Spermathecae of 4.5" F B. albopilosum

Cass

 

[Ms.X]

Spermathecae of a 6.5" L. violaceopes:

 

[BCscorp]

P. pederseni mature male ventral and dorsal pics

 

[Mack&Cass]

Psalmopoeus cambridgei spermathecae

Cass

 

[Mack&Cass]

Acanthoscurria geniculata spermathecae

Cass

 

[Mack&Cass]

Aphonopelma anax spermathecae

Cass