Spiny-backed Orb Weaver Gasteracantha cancriformis

Spiny-backed Orb Weaver
Spiny-backed Orb Weaver
The Spiny-backed Orb Weaver spider is native to the Americas (North, Central and South) and has 6 spikes on the edge of its back. These photos were taken by Alexandra Makhnina in Mexico.
Spiny-backed Orb Weaver
Spiny-backed Orb Weaver
The round web or orb that she weaves. The female, as usual with spiders, is much larger than the male, which doesn't have the prominent spikes.