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Black or brown widow?

Kevin Aug 01, 2003 12:46 PM

Hi,
i recently returned from a trip from central florida.
i collected about a few dozen or so L.geometricus, that were very light brown or tan with a very distinctive pattern.

i than collected 1 L.mactans more south in marion county.
i beleived the widow i caught in marion was a l.mactans because she was black and had a very red hourglass.
now that i returned she laid an eggcase which was golden and pear shaped but tufted, not as tufted as the browns and a little smaller and papery but it had some tufts on it.
she has no pattern and even under bright light i do not see and pattern
what could she be?
a cross?
also she constructed a large sphere out of silk that she lives in.
thanks
Kevin

Replies (1)

Venom Aug 01, 2003 03:28 PM

Do her legs show any signs of banding, and is the bottom portion of her hourglass pointed, as in this picture :

http://forums.insecthobbyist.com/view.php?id=1717,1803

This is a confirmed dark morph of L.geometricus :

http://www.arachnology.org/Arachnology/Pages/Pictures/geometri.jpg

The top picture is most likely an L.geometricus as well, as it exhibits leg banding , tufted eggsacs, and a pointed hourglass.
If you go to this picture below, you will see that the brown widow has a distinctely pointed hourglass :

http://www.petbugs.com/caresheets/L-geometricus.html

If your widow doesn't have the different hourglass, or the leg banding, I would say that it is most likely a true L.mactans, and that, a small amount of tufting is possible in other Lactrodectus species.

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