👉 Malacopterygian is a scientific term that refers to a group of marine reptiles, including some species that are closely related to snakes but have different features and adaptations. These include the Malacopterygota group (including the modern-day snake family) and the Parapeneidae group (which includes the sea turtles). The term was coined by the American geologist Charles Darwin in 1872, who described them as "very small" marine reptiles with a