''Chthamalus anisopoma'' is a species of intertidal barnacle. Indigenous to the northern Gulf of California, adult ''Chthamalus anisopoma'' are found on exposed shores between 0.0 and 2.0 m above mean low tide. The species is typically absent in areas protected from wave splash. Notably, ''Chthamalus anisipoma'' exhibits predator-mediated

plasticity Plasticity may refer to: Science * Plasticity (physics), in engineering and physics, the propensity of a solid material to undergo permanent deformation under load * Neuroplasticity, in neuroscience, how entire brain structures, and the brain it ...

in the growth of its calcareous test. In the presence of the carnivorous

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

''Acanthina angelica'', the barnacle's typical conical growth form is altered to appear bent over, with the operculum perpendicular to the substrate. The alternate form is more resistant to predation.

References

Barnacles Crustaceans of the eastern Pacific Ocean Crustaceans described in 1916 {{Maxillopoda-stub