''Menesiniella aquila'' is a species of

acorn barnacle Acorn barnacle and acorn shell are Common name, vernacular names for certain types of stalkless barnacles, generally excluding goose barnacles, stalked or gooseneck barnacles. As adults they are typically cone-shaped, symmetrical, and attached to r ...

in the family

Balanidae The Balanidae comprise a family of barnacles of the order Balanomorpha. As a result of research published in 2021 by Chan et al., the members of the family Archaeobalanidae were merged with this family. Genera These genera belong to the family B ...

. It is found off the California coast from San Francisco to San Diego from the bottom of the

intertidal zone The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species o ...

down to depths of 18 m. It is preyed upon by fish, sea stars, and certain carnivorous snails. Fish also rub against the barnacles to clean themselves of parasites, which wears the barnacles shells to a smooth surface. This species was formerly a member of the genus ''

Balanus ''Balanus'' is a genus of barnacles in the family Balanidae of the subphylum Crustacea. This genus is known in the fossil record from the Jurassic to the Quaternary periods (age range: from 189.6 to 0.0 million years ago.). Fossil shells withi ...

''.

References

Barnacles Endemic fauna of California Crustaceans of the eastern Pacific Ocean Crustaceans described in 1907 Taxonomy articles created by Polbot Taxobox binomials not recognized by IUCN Fauna without expected TNC conservation status {{crustacean-stub