Harvestmen do not have silk glands, so they cannot spin webs they also lack the venom glands that true spiders possess. Among the obvious structural differences are harvestmen’s having one apparently unified (usually egg-shaped) body, while true spiders have clearly separate head and abdomen regions. Similar species: Though they also have long, thin legs and are also often called daddy longlegs, harvestmen (in order Opiliones) are quite different and unrelated. To distinguish it from other cellar spiders may require close examination of palps, “face” structure, carapace markings, and eye groupings. Perhaps the most common species in our area is the longbodied cellar spider, Pholcus phalangioides. Many common spiders in this family have 8 eyes arranged into three groups: 2 in the center of the face, and a cluster of 3 on each side of the central pair. Most have oval or rounded abdomens, sometimes described as “peanut shaped.” Females build nonadhesive, unorganized, messy-looking cobwebs, usually in corners or crevices. The first episode of Whitey Exotics Outdoor Adventure, Out of nowhere Cellar Spider vs. Some species have darkened joints on their legs, giving them a “knobby-kneed” look. This movement turns them into a blur, rendering them practically invisible to potential predators. Other characteristics add to their camouflage: Their gray, tan, or whitish color, small body size, and remarkable habit of “vibrating” or bouncing rapidly in their webs when alarmed. An urban legend has sprouted up for both Harvestmen and Cellar Spiders that they are actually the most poisonous spiders in the world, but their fangs are too. Another difference is that Daddy Longlegs are not venomous. House Spider Identification The cellar spider is a harmless, brown spider with a small rounded abdomen and long thin tan-colored legs. However, the name daddy long-legs is also given to other arthropods like harvestmen and crane flies. The tarsi (“feet”) are flexible, adding to the wispy impression they give. Daddy Long Legs actually have only two eyes unlike spiders who have eight. The cellar spider also goes by common names like vibrating spiders, carpenter spiders, and daddy long-legs spider. Cellar spiders are inconspicuous, harmless, fragile spiders with extremely long, thin legs.
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