"Cryptodira" Natural Recordings by Native Speakers
Cryptodira is a group of turtle-like reptiles that have a hidden or cryptic pillar-like structure in their limbs, which is usually a retr競ourceable external nub or process on the humerus or femur. This characteristic is thought to be related to their ancestors' ability to pull their heads and limbs into their shells for protection. The term "Cryptodira" was coined by the German paleontologist Hermann von Meyer in 1837. Today, the group is divided into two suborders: the Trionychia (painted turtles and relatives) and the Testudines (true turtles and tortoises).
Cryptogamia refers to a group of organisms that reproduce by producing spores, rather than seeds. It includes ferns, mosses, liverworts, and other non-flowering plants that have no stems or flowers. They typically reproduce by producing large numbers of spores, which are dispersed to grow into new plants. The term "cryptogam" literally means "hidden seed", as the spores are not visible or obvious like the seeds of flowering plants.