Cyanoplax

Cyanoplax is a genus of chitons, a group of marine mollusks in the family Lepidochitonidae. These small, oval-shaped animals are commonly called “blue-grey chitons” due to their characteristic coloration. They are known for their distinctive, eight-plated shells, which are often adorned with intricate patterns and textures.

Cyanoplax beanii

Cyanoplax berryana

Characteristics

Cyanoplax species are typically small, with most reaching lengths of only a few centimeters. Their bodies are flattened dorsoventrally, resembling a small, elongated oval. The most prominent feature of these chitons is their dorsal shell, composed of eight overlapping plates (valves) that are firmly attached to a tough, leathery girdle. The plates are typically a greyish-blue color, often with brown or black markings, and may be ornamented with fine ridges or grooves. The girdle is usually a darker shade of blue or black and may have hair-like structures called spicules.

Environment and Distribution

Cyanoplax chitons are found in intertidal and subtidal marine environments, typically on rocky shores or reefs. They are often found in crevices, under rocks, or among algae. They prefer habitats with moderate wave action and good water circulation. Cyanoplax species are widely distributed throughout the world's oceans, with a particular concentration in the Pacific and Atlantic coasts of North America.

Diet and Behavior

Like other chitons, Cyanoplax are herbivores, feeding primarily on algae and diatoms that they scrape from surfaces using their radula, a tongue-like structure with rows of teeth. They are generally nocturnal, emerging from their hiding places at night to graze. During the day, they remain concealed, using their powerful foot to adhere firmly to rocks or other surfaces.

Examples of Species

The genus Cyanoplax includes several species, some of the most well-known include:

  • Cyanoplax hartwegii (Hartweg's chiton)
  • Cyanoplax dentifer (Spiny chiton)
  • Cyanoplax corrugata (Wavy chiton)

References

For more information on Cyanoplax, consult the following resources: