part of tarsus cuticular structure depressor cuticular guide Martin Ramirez spider_anatomy 2016-11-28T19:58:30Z A cuticular structure arising ventrally from the cuticle of the foot of many spiders, usually from the internal wall of the condyles, may be produced into a pair of thick, parallel ridges that provide a canal for the depressor tendon. The guide extends from the tip of the pretarsus to the foot slits or may continue further into the tarsus. The guide is usually open dorsally, but in some spiders with flexible feet, it is closed making a tube. SPD:0000828