Latrodectus hesperus
(Western Black Widow)

Picture ID 75579

Picture of Latrodectus hesperus (Western Black Widow) - Dorsal

Comments & ID Thoughts

Looks like Western Black Widow. Was making web on outside door handls.

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ItsyBitsy
Moderator

Latrodectus hesperus(Western Black Widow)

J_staff99
Member

I imagine it is Latrodectus, but it’s not a western black widow. They are black with a red hourglass on the underside of their abdomen.

TangledWeb
Member

This is the topside (dorsal) of the spider. That’s why you can’t see the red hourglass mark.

J_staff99
Member

Westerns are black on the topside, unless this is some sort of juvenile form, it’s not a western.

ItsyBitsy
Moderator

Juvenile Western Black Widows have a red line or fused spots along the dorsal of the abdomen indicating this is either a juvenile or maybe a young adult.

Example of a juvenile Western Black Widow (L. hesperus): https://bugguide.net/node/view/1574467/bgimage

I think this female is penultimate and has similar coloration: https://bugguide.net/node/view/1480591/bgimage

Additional Pictures

Picture of Latrodectus hesperus (Western Black Widow) - Dorsal Enlarge Picture
Picture of Latrodectus hesperus (Western Black Widow) - Dorsal Enlarge Picture
Picture of Latrodectus hesperus (Western Black Widow) - Male - Dorsal Enlarge Picture
Picture of Latrodectus hesperus (Western Black Widow) - Lateral Enlarge Picture