-Animals (Kingdom Animalia)

-Arthropods (Phylum Arthropoda)

-Chelicerates Subphylum Chelicerata

-Arachnids (Class Arachnida)

-Spiders Order Araneae

-Typical Spiders (Suborder Araneomorphae)

-Entelegyne Spiders (Infraorder Entelegynae)

-RTA Clade Spiders (Zoosection Rta clade)

-Oval Calamistrum Clade Spiders (Zoosubsection Oval calamistrum clade)

-Wolf Spiders and Allies (Superfamily Lycosoidea)

-Trechaleid Spiders (Family Trechaleidae)

-Genus Trechalea

Trechalea is a relatively large, crablike spider. The body is moderately flat, with long legs that are held in a somewhat crablike stance. In the southwestern United States, these spiders are found at the margins of permanent streams and are typically seen perched head-down on the surfaces of rocks near the water margin.