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View Full Version : Sex my Aphonopelma sp please!



Sterlingspider
11-21-2009, 08:07 PM
Yes, I bought ANOTHER one. :p Based on the same criteria (spinnarette colour, diagonal line on the
metatarsus) I'm calling this another A. sp "Guatemala".

http://www.arachnoboards.com/ab/gallery/displayimage.php?imageid=14909

It's very slightly larger then the one I got a few weeks ago (also ~4") and based on the undercarriage
looking completely different I'm hoping this one's a seņorita (or at least that one of them is anyway).

http://www.arachnoboards.com/ab/gallery/displayimage.php?imageid=14908

Post discussing the sex (and species) of the first one here:
http://www.arachnoboards.com/ab/showthread.php?t=166781

Hobo
11-21-2009, 08:23 PM
I actually thought your first one was female.... I don't remember if I ever posted though...

This one looks male in comparison with the other. I wouldn't know what to think if I saw it without the other as reference.

DanHalen
11-21-2009, 08:44 PM
I'd put good money on this one being male.

Sterlingspider
11-21-2009, 08:50 PM
I'd put good money on this one being male.

Then would you say the other one (http://www.arachnoboards.com/ab/showthread.php?t=166781) is female?

Note: admittedly I stink at ventral sexing but I was sure my 1st one was a female before I posted the original sexing pic (http://www.arachnoboards.com/ab/gallery/showimage.php?i=14721&catid=member&imageuser=3215), based on what I thought I understood about ventral sexing I too would have called this male. Now I have NO idea.

Clearly they are completely different, but which is which I just don't know anymore.

gvfarns
11-21-2009, 11:04 PM
Looks like a dude to me.

Sterlingspider
11-21-2009, 11:07 PM
Looks like a dude to me.

Then I ask of you as well; would you say my other one (http://www.arachnoboards.com/ab/showthread.php?t=166781) is female?

If so/not why?

I'm really trying to understand what people are looking for and every time I think I have it nailed down I get all turned around again.

Teal
11-21-2009, 11:10 PM
This one posted here, and the one you are linking to - both look male to me.

Sterlingspider
11-21-2009, 11:14 PM
This one posted here, and the one you are linking to - both look male to me.

See, I don't get that, this one has the super obvious arch, the other one does not. What are you looking at?

Teal
11-21-2009, 11:23 PM
Well, I'm no expert LOL I am looking at the furrow area (is it only called that on females? lol)

After looking MUCH closer... the book lung positioning is different, so I would say one is male and one is female... but I wouldn't be sure which.

Just between those two pictures.. I'd guess this one is female, and the other is male.

joshuai
11-21-2009, 11:23 PM
Hay i might need one of thoes males for my female;)

Sterlingspider
11-21-2009, 11:28 PM
Well, I'm no expert LOL I am looking at the furrow area (is it only called that on females? lol)

After looking MUCH closer... the book lung positioning is different, so I would say one is male and one is female... but I wouldn't be sure which.

Just between those two pictures.. I'd guess this one is female, and the other is male.

I'd be a bit iffy on using booklung positioning without new photos as the other T was WAAAAAAY skinny when I got it. I'm pretty sure it had JUST shed.
I'll have to get some pics now (19 days and 24 crickets later) to compare.

Mvskokee
11-21-2009, 11:32 PM
im pretty crappy at vent sexing. i usually just wait for molts

aliceinwl
11-21-2009, 11:57 PM
This one looks male, but the one in the links really looks female to me.

Hope you don't mind, but I pulled you photos and outlined the relevant features:

http://i88.photobucket.com/albums/k196/aliceinwl_2006/t-sexing.jpg

The arch made by the epiandrous fusillae is really obvious in the spider posted on this thread and absent on the linked spider. This spider's first book lungs are also more parallel while the linked spider's are more flared.

-Alice

rd_07
11-22-2009, 12:06 AM
+1 male on 1st pic

Teal
11-22-2009, 12:30 AM
I'd be a bit iffy on using booklung positioning without new photos as the other T was WAAAAAAY skinny when I got it. I'm pretty sure it had JUST shed.
I'll have to get some pics now (19 days and 24 crickets later) to compare.

I'm not going by that 100%, of course. But differences must be noted, if you're trying to figure out what's what :)

Newer pictures, with the T more well fed, probably would be helpful... but you gave us THOSE pictures to go by, so that's what I'm doing :p

Sterlingspider
11-22-2009, 01:06 AM
Newer pictures, with the T more well fed, probably would be helpful... but you gave us THOSE pictures to go by, so that's what I'm doing :p

Because s/he is the ginchiest Geist actually came out and climbed a wall right when I needed her/him to.

Just to be clear: this is a shot of the ORIGINAL tarantula with considerably more weight on. This is not the same T as the top of this post.

http://www.arachnoboards.com/ab/gallery/displayimage.php?imageid=14911

Mvskokee
11-22-2009, 01:08 AM
i see male in that one

Sterlingspider
11-22-2009, 01:11 AM
This one looks male, but the one in the links really looks female to me.

Hope you don't mind, but I pulled you photos and outlined the relevant features:
(snipped for size)
The arch made by the epiandrous fusillae is really obvious in the spider posted on this thread and absent on the linked spider. This spider's first book lungs are also more parallel while the linked spider's are more flared.

-Alice

aliceinwl, that is totally awesome and exactly the kind of thing I need to see more of. Those are the structural differences I was looking at in the first place and I was starting to wonder if I was going crazy.
I've just linked a fresh pic of the linked spider in a well fed state so the positioning of the booklungs and should be more easily compared.

Teal
11-22-2009, 01:43 AM
Yup, I am still saying that one is male :)

And aliceinwl, awesome depiction in those two pictures! VERY helpful!

Hobo
11-22-2009, 07:07 AM
Well you know what, part of the problem with ventral sexing from pics (IMO) is not so much the method, but the means.

When you are looking at a tarantula right in front of you, at least with some of the larger Ts, it's much easier to see the necessary, tell-tale signs of it being male or female. With pictures, it's more of a guess than usual, since you are looking at a picture with a fixed angle, perhaps too much or too little a flash, or some other distortion that may sway your guess away from the actual sex of the tarantula!

For example, if you would allow me to post 2 pictures here:
http://www.arachnoboards.com/ab/gallery/displayimage.php?imageid=14867 http://www.arachnoboards.com/ab/gallery/displayimage.php?imageid=14866

Both these pics are from the same individual. The second one ended up looking far more "male" than the first, and all it took was a slightly different angle to do so. Tricky business!

Now with your situation, assuming they are indeed of the same species (and the same size), I would say you most likely have a pair! I actually asked a relavent question in another thread of mine (http://www.arachnoboards.com/ab/showthread.php?t=168418) - whether or not a minute difference in the ventral areas of two individuals of the same species at the same size would mean different sexes.

Err... to conclude: Your two Ts, if I saw them each seperately, I would say they are both male. But if they are indeed the same species, about the same size, and depending on the answer to my question, you might have a pair - with your first T looking more "female" than the other.

Sorry if this is too long winded or doesn't make sense, but I've jsut realized it's 4am where I live, and I really should be getting some sleep!

Sterlingspider
05-31-2010, 10:25 PM
Given the hot debate at the time of original posting I figured it would be relevant to post my most recent pic of Geist, the first purchased A sp. Guatemala of the two that came up in this thread...

I think the image speaks for itself :D

Edit: Just to be clear! I had my threads mixed up when I first posted... this is the thread for Rauch, my second Guatemala (who has not yet shed in my care), the molt pictured here is of Geist (the first one originally discussed here: http://www.arachnoboards.com/ab/showthread.php?t=166781 )

http://www.arachnoboards.com/ab/gallery/files/3/2/1/5/confirmed_thumb.jpg (http://www.arachnoboards.com/ab/gallery/showimage.php?i=16770&c=member&imageuser=3215)

codykrr
05-31-2010, 10:27 PM
female.:clap:

edit: i hope mine is a girly too!

xhexdx
06-01-2010, 11:10 AM
Without reading any posts other than the OP's, that's a male.

To be clear, I'm referring to the very first ventral shot, not the shot of the molt.

I also just noticed that this thread was from ~6 months ago. :}

Sterlingspider
06-01-2010, 05:30 PM
Without reading any posts other than the OP's, that's a male.

To be clear, I'm referring to the very first ventral shot, not the shot of the molt.

I also just noticed that this thread was from ~6 months ago. :}

That is my guess as well given the ventral differences. Sadly I suspect this one is too close in size to the confirmed female to make them a good match at the size they are (she's about 3.5 inches, "he" is probably closer to 3).

I resurrected the two threads because I thought it worth having such a clear comparison. I only wish I could figure out the sex of more of my Ts within the first 6 months!

xhexdx
06-02-2010, 09:23 AM
If I had seen this thread when you first posted it, I'd have said the same thing.

If you slow down the feeding schedule of the male and feed the tar out of the female, you can still probably get them to mature around the same time. She'll be ready by her next molt, and maybe he'll take two to hook out.

Although...I just had a P. miranda male mature and he's ~4"...so you never know.