Nesticidae
Guides
Eidmannella
Eidmannella is a genus of scaffold web spiders (family Nesticidae) established by Roewer in 1935. The genus contains eight described species, including the invasive Eidmannella pallida, which has demonstrated significant invasive potential and ecological concern. Species in this genus are associated with both surface and subterranean habitats.
Eidmannella pallida
Pallid cave spider
Eidmannella pallida is a scaffold-web spider in the family Nesticidae with native distribution in North America and established invasive populations across multiple global regions. The species has been introduced to Pacific Islands, the Galápagos Islands, Macaronesia, Spain, Japan, and Italy, where it demonstrates high invasiveness potential. It readily establishes permanent populations in anthropogenic habitats including vineyards, annual crop fields, and olive groves, and shows particular tendency to exploit vulnerable subterranean ecosystems such as caves.
Nesticus barri
Nesticus barri is a species of cave spider in the family Nesticidae, first described by Willis J. Gertsch in 1984. The species is endemic to the United States. Members of the genus Nesticus are commonly known as cave cobweb spiders or scaffold web spiders, typically inhabiting dark, humid environments.
Nesticus brimleyi
Nesticus brimleyi is a species of cave-dwelling spider in the family Nesticidae, described by Gertsch in 1984. Members of this genus are commonly known as scaffold web spiders or cave spiders. The species is endemic to the United States.
Typhlonesticus silvestrii
Silvestri's Cave Spider
Typhlonesticus silvestrii is a troglobitic spider in the family Nesticidae, first described by Fage in 1929. The species is endemic to cave systems and exhibits adaptations typical of obligate cave-dwellers, including reduced pigmentation and elongated appendages. It represents one of the specialized members of the genus Typhlonesticus, which comprises European cave spiders with restricted distributions. The species was originally described under the genus Nesticus before being transferred to Typhlonesticus.