These spiders are very common along the Pacific Coast. Holocnemus pluchei also has a rectangular, elongate abdomen but has a brown stripe on the ventral side (the belly side - which is typically directed upwards since the spider hangs upside down in its web) which covers its sternum and is a stripe on the abdomen. Pholcus phalangioides is a uniformly grey spider with rectangular, elongate abdomen and is found throughout the U.S. ![]() The most common pholcid spiders found in U.S. This is most probably the animal to which people refer when they tell the tale because these spiders are plentiful especially in cellars (hence their common name) and are commonly seen by the general public. Because these arachnids are spiders, they have 2 body basic body parts (cephalothorax and abdomen), have 8 eyes most often clumped together in the front of the body, the abdomen shows no evidence of segmentation, have 8 legs all attached to the front most body part (the cephalothorax) and make webs out of silk. Previously the common name of this family was the cellar spiders but arachnologists have also given them the moniker of "daddy-longlegs spiders" because of the confusion generated by the general public. These long-legged spiders are in the family Pholcidae. Scorpions are in the Order Scorpiones, spiders are in the Order Araneae, ticks and mites are in the Order Acari.Īnother creature often called daddy-longlegs is actually a spider. In the animal class Arachnida, there are several lower level divisions called Orders. Most folks who retell this tale have no idea that they are referring to two completely separate groups of animals: "daddy-longlegs" and "daddy-longlegs spiders". But a mongoose considers cobras to be lunch because they are immune to the venom. Cobras are venomous because they have venom which can have a negative effect on some mammals such as humans so the effect in humans is toxic. The correct term for having a negative effect on a target organism is "toxic".Poison oak causes dermal injury in humans but deer readily eat the plant so "poisonous" does not imply universal effect. ![]()
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