part of opisthosoma seta elongated pedicillate seta 2009-08-10T12:27:15Z spider_anatomy Each of the several long, elongate setae, with strong socket and smooth shaft, occurring anteriorly on the opisthosoma around the pedicel. They are presumably propioceptors of the position of the opisthosoma relative to the prosoma. SPD:0000487 Martin Ramirez sensory organ