triangle spider

The triangle spider (Hyptiotes cavatus) is a small American arachnid found in the dead branches of evergreen trees. It constructs a unique triangular web with four radii and a double elastic fiber. The spider holds the apex of the web taut, releasing it to spring the net when an insect touches it.1

Arachnids, a class of arthropods, possess segmented bodies, exoskeletons, and jointed appendages. Most are predatory, using digestive fluids to liquefy prey before consumption. Their bodies are typically divided into a cephalothorax and an abdomen, with eight legs in total. The triangle spider belongs to the family Uloboridae, which are known for lacking poison glands.23