Latrodectus mirabilis, sometimes (but rarely), known as black widow is a spider species that is native to most of South America in the genus Latrodectus of the family Theridiidae.

Latrodectus mirabilis
Latrodectus mirabilis female
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Theridiidae
Genus: Latrodectus
Species:
L. mirabilis
Binomial name
Latrodectus mirabilis
(Holmberg, 1876, Argentina)

Description

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Instead of an "hourglass" pattern on the ventral side of this species, this spider has a red rectangle on its ventral side.

Venom

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This spider's bite has never been recorded but as with other Latrodectus species most people think the bites are venomous and causes latrodectism.

Look-alikes

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The False Black Widow looks more like this species than any other in Latrodectus except the Brown Widow.

References

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Research Gate