What structure, sometimes found in the web of a Gasteracantha spider, appears as a dense, zigzag pattern of silk?

Answer

Stabilimentum

A feature that frequently accompanies the web of a Gasteracantha spider is the stabilimentum, which is a dense, zigzag pattern of silk woven into the web, usually near the center or hub.

What structure, sometimes found in the web of a Gasteracantha spider, appears as a dense, zigzag pattern of silk?
spideridentificationarachnidKite