These are haplogyne spiders, and have six eyes, arranged in three groups of two. They have long cylindrical bodies, ideal for their preferred hiding places of holes in walls and bark. They put down silk threads round their entrance holes to entrap their prey. Their front two pairs of legs can often be seen projecting from their retreats after dark. There is no visible epigyne on the female, and the pedipalps on the males are simple compared with the majority of spiders.
|Head and chelicerae of female Segestria senoculata||Chelicerae of female Segestria senoculata||Left Pedipalp (male sexual organ) of Segestria senoculata|
|The six eyes of Segestria senoculata||Spinnerets of Segestria senoculata||Tarsal claw of Segestria senoculata|
|Pedipalp of a female Segestria senoculata|