Rookactidae

Rookactidae is a small family of spiders in the order Araneae. Described in the 21st century, it was defined by distinctive morphological traits and supported by molecular data, though its status remains disputed in some classifications. The family is generally accepted to comprise two genera and several described species, most of which occur in forest floor habitats.

Members are small to medium-sized (roughly 4–9 mm in body length) with eight eyes arranged in two forward rows. They have a smooth cephalothorax, moderately spined legs, and elongated posterior spinnerets that protrude beyond the abdomen. Coloration varies from dull browns to pale mottled patterns suitable for leaf-litter camouflage.

Ecology and behavior: They are primarily ground-dwellers and nocturnal ambush predators, often relying on leaf litter or low vegetation for concealment. Diet consists of small insects and arthropods. Some species construct small silk retreats or use hidden silken linings within their shelters.

Distribution and habitat: Descriptions so far come from temperate forests of North America and parts of Eurasia. The precise range is uncertain and under-sampled regions likely host additional species. They favor moist microhabitats with abundant detritus.

Taxonomic status: As a recently described and debated lineage, Rookactidae is the subject of ongoing phylogenetic analysis. Additional molecular data and comparative morphology are needed to clarify internal relationships and confirm its status as a distinct family.