Dactylosaurus is a species of marine reptiles, belonging to Nothosauroidea Pachypleurosauridae. Dactylosaurus with Anarosaurus is one of the earliest known European pachypleurosaurs. Dactylosaurus generic name in the Greek context as "finger lizard". The nasal bones of Dactylosaurus meet and are broadly structured. The upper temporal fenestra is large and kidney-shaped.