👉 Notarchidae are a family of arachnids that include spiders, orb-weavers, and other similar insects. They are characterized by their elongated body structures with a long trunk or abdomen, which is used for crawling and feeding. Notarchidae is divided into two subfamilies: the Masticatae (which includes spiders) and the Arachnidae (which includes orb-weavers).