The family Liocranidae, belonging to the order Araneae (spiders), is a group of mostly small to medium-sized ground-dwelling spiders commonly referred to as liocranid sac spiders. These spiders are typically nocturnal hunters that do not rely on webs to catch prey, instead actively stalking insects and other small arthropods. They are distributed worldwide, with many species found under stones, leaf litter, or within crevices. Morphologically, liocranids often have a somewhat flattened body and eight eyes arranged in two rows, and their coloration tends to be muted browns or grays, aiding in camouflage. Ecologically, they contribute to controlling insect populations and maintaining balance in their terrestrial habitats.