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Brown widow

Latrodectus geometricus


The last 4 pictures of the series were captured the night after shooting the first 2 pictures, only 50 cm away. I suppose they are the same specie or even more, the same individual (because I found the exoskeleton of the spider in the web, which can be a sign that it molted). I think they are Latrodectus, but I can not find the specie.


Dry forest


After long discussion with some colleagues, the spider was identified as Latrodectus geometricus.

1 Species ID Suggestions

Black Widow Spider
Latrodectus mactans

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GustavoMorejon 7 years ago

Thanks John, I checked all the known Latrodectus for South America, and none of the species listed is similar to that one (Except probably for L. antheratus). I will need to take more pictures of the spider.

John La Salle
John La Salle 7 years ago

Certainly a Latrodectus (some form of black widow).
I am not sure that L. mactans extends as far south as Ecuador, so it might be a different species.

Spotted by

Guayllabamba, Provincia de Pichincha, Ecuador

Spotted on Apr 8, 2013
Submitted on Apr 8, 2013

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