Cerata

The tortrix mothgenusCerata is considered a junior synonym of Cydia.

Cerata, singular ceras, are anatomical structures found externally in nudibranchsea slugs, especially in aeolid nudibranchs, marineopisthobranchgastropodmollusks in the cladeAeolidida. The word ceras comes from the Greek word κέρας (kéras), meaning "horn", a reference to the shape of these structures.

Cerata are dorsal and lateral outgrowths on the upper surfaces of the body of these nudibranchs.