male or female

[vincent winyard]

hi there everyone need help. my brazilian white knee molted yesterday and i want to know if it's male or female. i've taken these photo's to see if anyone can confirm the gender for me thank's.

[craig mcinnes]

Most definitely female. Have a look here and you can see why -

http://www.arachnophiles.co.uk/forum/showthread.php?5442-Sexing-a-tarantula

[vincent winyard]

hi craig thank's for your reply. that is good news i did have an idea from photo's in a book i needed to get it confirmed though thank's again mate.

[Paolo Trabucco]

Hi there!!
Can anyone confirm from the pic below, that my Grammostola Rosea its a Female....?
Its a year in august since i've bought Her and never molted yet.
by the looks its a female coz i can't see any hooks on the front legs, and i think its quite fat for being a male.
Anyway i just wanted 2 know if anyone of you can confirm that for me. Thankx

[Peter Lacey]

Paolo, you need to supply a pic of a moult to get an accurate ID on sexing. Ventral sexing isnt considered accurate but there are areas where a good idea can be obtained. You'd need a quality image from around the book lungs but I wouldnt consider myself experienced enough to determine sex by this method.
The males only have emboli, and for most species tibial spurs, when they mature. Its at this time that their body structure changes to the slim abdomen and slim slender legs but prior to maturity the male and female generally look the same.

Mikhail Bagaturov produces a good article on ventral sexing:

http://tarantulas.tropica.ru/en/node/586

and here's another from Chris Sainsbury:

http://www.arachnoboards.com/ab/showthread.php?t=84086

[Rebecca Bastin]

While on the topic of sexing- could someone please have a look at my B. albopilosum molt? The abdomen is about 2cm long, I don't know whether this is too small to tell, but I managed to rehydrate and unravel it. There are photos from inside the molt and outside, I have a feeling it's male?? Also all the legs had fallen off the molt by the time it was placed outside the burrow, the spid has all his/hers, should I be worried?!

Many Thanks

[Christopher Smallman]

While on the topic of sexing- could someone please have a look at my B. albopilosum molt? The abdomen is about 2cm long, I don't know whether this is too small to tell, but I managed to rehydrate and unravel it. There are photos from inside the molt and outside, I have a feeling it's male?? Also all the legs had fallen off the molt by the time it was placed outside the burrow, the spid has all his/hers, should I be worried?!

Many Thanks

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Cant help with the sexing of your moult Im sorry.

But there is nothing to worry about with the legs falling off the shed skin your lucky you have that much intact my Brachypelma albopilosum used to rip his to shreds and dump everything in the waterdish.

Hope someone can help with the moult

Chris.

[Chris Graham]

While on the topic of sexing- could someone please have a look at my B. albopilosum molt? The abdomen is about 2cm long, I don't know whether this is too small to tell, but I managed to rehydrate and unravel it. There are photos from inside the molt and outside, I have a feeling it's male?? Also all the legs had fallen off the molt by the time it was placed outside the burrow, the spid has all his/hers, should I be worried?!

Many Thanks

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It looks as though it is a male to me also

[Rebecca Bastin]

Ta for the help, looks like I can finally start thinking up a name!

[Paolo Trabucco]

Hi guys ! i have finally rescued the fresh molted exuvium, of my Grammostola rosea, first molt since i got it august last year.
Well i have the pics on here, I had a online search and looked on the tarantula keeper's guide, and my conclusions are that my Hendrix is a SHE.
Can anyone confirm that for me please. I love this hobby, and i just love study my T's.

[Peter Lacey]

If you look at the first pic in this thread you'll see an excellent example of what you're looking for, a flap (uterus externus) about the slit (epigastric furrow) on top of which are some well formed protrusions (spermatheca). This area develops sexually as the spider ages, therefore they're less developed in smaller specimens and fully developed in adult females.
Rebecca's pics show no sign of the flap which suggests a male.
Paolo's pic shows the flap which tells us its female. If you could get a close-up pic around the upper booklungs perhaps we could see the protrustions too.

[Colin D Wilson]

therefore they're less developed in smaller specimens and fully developed in adult females..

I think we'd better let the spiders in on this one.
After seeing Pat's pictures of a Harpactira (?) showing fully sclerotised spermatecae after a moult, then the next moult picture looking like a juveniles organs - we've been keeping an eye on our moults a lot more intently and not just logging a spider as female when sexed as we all do and then dismissing the susequent moults as we've already established the sex, we've had a few Juveniles showing what would appear to be fully developed sexual organs, but far too young (and small) to consider breeding, just waiting on the next moults to see if this changes in any way.

[Anton Beukes]

Heya folks,
I came across this photo and was told its a female... Im sorry for posting this here, but im still very knew to this forum, (e.g. post number one!).
Anyone able to say yay or nay on the female theory??

http://www.glowfoto.com/static_image/30-132802L/3793/jpg/08/2010/img4/glowfoto

Thank you in advance!

[Peter Lacey]

Hi Anton and welcome to the forum
Any chance of a pic inside the moult, around the booklungs is the area we need to examine.