mutant tarantula

[Tom Forman]

check it out:

http://www.tarantulas.ru/tex/2opist_11_foto.jpg

[Mikhail F. Bagaturov]

Tom, I believe You not the first noticed this tarantula...
You can find a plenty of the discussion about it on AB forum.

[Pam Turner]

It's an egg that tried to twin and failed. It's where we (humans) get conjoined twins from.

[Richard Shah]

Some twisted things going on right there... you may be right Pam, and that is what I thought, or it could just be something else to do with the egg development...

[Gayle E. Anderson]

Don't you sometimes (incredibly rarely) get the same with a 'twin' carapace?

I seem to recall this being discussed on here before.