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The spider family Filistatidae (crevice weavers) includes 115 described species (Platnick 2013). Seven of these species occur in North America north of Mexico, including five large spiders in the genus Kukulcania (the other two are small spiders, <5 mm long) (Bradley 2013).

The common name "crevice weaver" refers to the retreat these spiders build in a crack or similar space, usually among rocks or dead wood. The spider builds a silken tube in this space then extends a circular band of hackle-banded silk (i.e., silk from the cribellum) in a circular pattern around the entrance. From this circular area the spider spins a series of long trip lines, yielding a distinctive web. Crevice weavers can often be found in and around buildings. (Bradley 2013).

The synanthropic Southern House Spider (Kukulcania hibernalis) is found in the southeastern United States (Bradley 2013), but is also widespread in South America (Brescovit and Santos 2013). It is among the most common spiders within its range in the eastern United States (Howell and Jenkins 2004). The eight eyes are tightly grouped on a central mound (Bradley 2013). This spider exhibits conspicuous sexual dimorphism. The female is dusky gray or black with a velvety covering of hairs. The legs have velvet hairs and many short spines. The male is tan with long legs and palps. These palps are often held in a folded position position, extending directly in front of the chelicerae. Markings on the male's carapace (the upper part of the cephalothorax) often result in these spiders being misidentified as Brown Recluse Spiders (Loxosceles reclusa), although Brown Recluses can be easily distinguished from Southern House Spiders by the fact that they have six eyes rather than eight eyes (Howell and Jenkins 2004; Gaddy 2009). Although the female Southern House Spider stays around her web crevice, the male roams and hunts like a wolf spider or fishing spider (Gaddy 2009).


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