Peronia
Peronia is a genus of sea slugs, specifically nudibranchs, belonging to the family Onchidorididae. They are commonly known as “peronid nudibranchs” and are characterized by their relatively small size, typically ranging from 5 to 25 millimeters in length. The genus was established by the renowned French malacologist, Alphonse Milne-Edwards, in 1874.
Common Names
Peronia species are often referred to as "peronid nudibranchs" or "peronids." Other common names, which are less frequently used, include "false dorids" and "dorid nudibranchs."
Characteristics
Peronia nudibranchs possess distinctive features that differentiate them from other nudibranchs. Their bodies are typically oval-shaped with a prominent dorsal hump, giving them a slightly domed appearance. They lack external gills, unlike many other nudibranchs, and instead have a respiratory pore located on the right side of the body. The rhinophores, which are sensory organs used for detecting food and other stimuli, are located on the top of the head and are often branched or lamellate.
The coloration of Peronia species can vary depending on the specific species and habitat. Some are brightly colored, while others are more muted or translucent. Their coloration can serve as camouflage or to warn potential predators of their unpalatability. They are also known for their distinctive feeding habits, often consuming sponges and other sessile organisms.
Environments
Peronia nudibranchs are primarily found in intertidal and subtidal zones in marine environments. They are typically associated with rocky substrates, seaweeds, and sponges. Their distribution is widespread, with species found in various locations around the world, including the Pacific Ocean, Atlantic Ocean, and Mediterranean Sea.
References
For more detailed information on Peronia species, refer to these reliable sources: