GBB spinnerets

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5 years 2 months ago #56047 by Brynn Lurie
Must be one of the Chernobyl imports :P


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5 years 2 months ago #56066 by Stanley A. Schultz

CB1981 wrote: ... here is the female with 3: ...


Yes, indeed. Three POSTERIOR spinnerets.

CB1981 wrote: ... So is the female supposed to have 4 spinnerets, but 1 of them came off during the last molt?


No. Yours has three posterior spinnerets, and at least two anterior ones. I have taken the liberty of cropping and resizing your photo, then pointing to the anterior pair. They're the little dark things that my "arrows" point to under the belly of the tarantula. (Click or right-click on the thumbnail to see a larger image. Click that image again to see the photo full size.) A normal tarantula only has 2 + 2. Yours has 2 + 3, possibly 3 + 3 but I can't see the belly of the tarantula clearly enough. The forward spinnerets only appear as little cushions, not little fingers.



When animals display developmental defects like this we seldom appreciate the ramifications. For instance, the extra spinneret may likely be functional, in which case there must either be a separate, second silk duct leading from one of the normal, internal silk glands, or from an extra, separate silk gland. In either case that would infer the presence of more than a single, normal, silk gland on that side of the tarantula's abdomen, which infers that something else must either be reduced in size or shoved off to one side to make room. And, such changes can effect the way other organs and body parts function, pinching off ducts for instance. (But, of course we don't know all that for sure in your case, it's just surmise.)

You have a defective individual. It could be something merely accidental in its embryonic development, but it could as easily be an inheritable, genetic defect ... a true mutation.

This is not a particularly desirable character that we might want to preserve. And as such I would strongly urge you to NOT breed this individual. In fact, I would urge you or anyone else who may have its siblings not to breed them either.

It will, however, make a great pet, and a bit of a conversation piece.

If you don't live near a nuclear power plant, are you sure you don't live too near a toxic waste dump? :silly:

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Marguerite Schultz
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5 years 2 months ago #56071 by Brynn Lurie
A little ironic :) the GBB is already a web master with 2 posterior spinnerets. I don't want to know what her tank looks like :P


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5 years 2 months ago #56090 by Conrad Bester
Stanley, you just sunk my boat! I got that female specifically for breeding, I have 2 males too. FFS! :igiveup:

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5 years 2 months ago #56094 by Phill Bosch
dis nou n teleurstelling.En females is so onmenslik skaars!

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5 years 2 months ago - 5 years 2 months ago #56187 by Stanley A. Schultz

CB1981 wrote: Stanley, you just sunk my boat! I got that female specifically for breeding, I have 2 males too. FFS! :igiveup:


Sorry. Assuming neither of your males are closely related to the female, surely someone else in S.A. has a nice nubile female ready to breed. Trust me. It'll be worth the effort!

The Tarantula Whisperers!
Stan Schultz
Marguerite Schultz
Co-authors of the TARANTULA KEEPER'S GUIDE, now in its third edition!
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Last Edit: 5 years 2 months ago by Stanley A. Schultz.

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