Liocranidae

Liocranidae can be distinguished from other sac spider families by subtle morphological features, though definitive identification often requires examination of copulatory organs. The family is placed in the superfamily Dictynoidea. Members typically have two tarsal claws and lack the enlarged anterior median eyes characteristic of some related families. The genus Agroeca is recognizable by its holarctic distribution and relatively well-documented morphology, while many other genera require specialist taxonomic knowledge for accurate identification.

Liocranidae occupy diverse habitats across their range. The North American genus Neoanagraphis inhabits extremely dry conditions in the Mojave, Sonoran, and Chihuahuan deserts, where females live in animal burrows. Other members are found in forest litter, under rocks and stones, and in well-vegetated habitats. Several species show cave-dwelling (troglobitic) adaptations, including eyelessness and depigmentation. The family has been introduced to some oceanic islands, with records from the Ogasawara Islands.

The family has a wide distribution including the Holarctic region, Oriental region, and parts of the Mediterranean. Specific distribution records include: Denmark, Norway, Sweden, China, Vietnam, southern India, Sri Lanka, Thailand, the Iberian Peninsula, Algeria, Tunisia, Italy, France, Spain, Sardinia, Sicily, Mallorca, and the Ogasawara Islands (Japan). The genus Agroeca is holarctic. The genus Paratus occurs in the Oriental region at altitudes of 27–2020 metres. The genus Neoanagraphis is restricted to North American deserts.

• termites - commensalismThe genus Andromma shows apparent commensalism with termites, though the exact nature of this association requires further study.

Females of some desert-dwelling species (Neoanagraphis) live in animal burrows while males wander and are frequently captured in pitfall traps. Many species are ground-dwelling and construct silk sac-like retreats. Cave-dwelling species show behavioral adaptations to subterranean life including reduced activity and enhanced sensory reliance due to eyelessness.

Liocranidae are not considered medically significant spiders. They are primarily of scientific interest for taxonomic and biodiversity research. The family has been the subject of extensive recent taxonomic work, particularly by researchers documenting new species from Asia.

• ClubionidaeAlso called sac spiders and construct similar silk retreats; distinguished by morphological details of eye arrangement and genitalia.
• CorinnidaeGround-dwelling spiders with similar habits; Liocranidae distinguished by tarsal claw structure and copulatory organ morphology.

• Araneae
• Araneomorphae
• sac spiders
• ground-dwelling
• cave-dwelling
• troglobitic
• Holarctic
• Oriental region
• Simon 1897

• BugGuide
• Wikipedia
• GBIF taxonomy match
• NCBI Taxonomy
• Catalogue of Life
• On the amazing discovery of a new species and how to choose names for spiders | Blog
• Araneae | Blog
• Pensoft Editorial Team | Blog - Part 32
• animals | Blog
• The genus Jacaena Thorell, 1897 from southern China (Araneae: Liocranidae)
• Studies in the Liocranidae (Araneae): revision of Andromma Simon, 1893
• A new species of Paratus Simon, 1898 (Araneae: Liocranidae, Paratinae) from India
• Description of three new troglobiontic species of Cybaeodes (Araneae, Liocranidae) endemic to the Iberian Peninsula
• Discovery of presumably introduced spiders, Oedignathascrobiculata Thorell, 1881 (Araneae, Liocranidae) and Boagriusqiong Lin & Li, 2022 (Araneae, Palpimanidae) on Chichi-jima Island, the Ogasawara Islands, Japan.