Rta-clade
Guides
Cybaeus
Soft Spiders
Cybaeus is a genus of araneomorph spiders in the family Cybaeidae, first described by Ludwig Carl Christian Koch in 1868. The genus contains approximately 198 species distributed across America, Europe, Japan, Korea, and China. North American species are classified into Holarctic and Californian clades, with many exhibiting restricted geographic ranges and conservation concerns. Females of different species are difficult to distinguish, particularly in North America; species identification relies heavily on examination of male pedipalps.
Trachelidae
Broad-Faced Sac Spiders, Ground Sac Spiders
Trachelidae is a family of araneomorph spiders within the RTA clade, elevated from subfamily status in 2014 based on molecular phylogenetic evidence. The family comprises 29 genera and approximately 307 species distributed across tropical, subtropical, and temperate regions worldwide. Members are commonly known as broad-faced sac spiders or ground sac spiders, though many species are arboreal. The family is characterized by reduced leg spines and other distinctive morphological synapomorphies that distinguish it from related families Corinnidae and Clubionidae.