ArkyidaeArkyidae, also known as triangular spiders, is a family of araneomorph spiders first described by Ludwig Carl Christian Koch in 1872 as a subfamily of Araneidae, and later elevated to a full family in 2017.Genera, this family includes two genera and 38 species:Arkys Walckenaer, 1837 – Indonesia, Australia, New Caledonia, New GuineaDemadiana Strand, 1929 – Australia