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Barnacle adults are sessile; most are suspension feeders with hard calcareous shells, but the Rhizocephala are specialized parasites of other crustaceans, with reduced bodies. Barnacles have existed since at least the mid-Carboniferous, some 325 million years ago. In folklore, barnacle geese were once held to emerge fully formed from goose ...
"The goose-tree" from Gerard's Herbal (1597), displaying the belief that goose barnacles produced barnacle geese.. In the days before birds were known to migrate, barnacle geese, Branta leucopsis, were thought to have developed from this crustacean through spontaneous generation, since they were never seen to nest in temperate Europe, [4] hence the English names "goose barnacle" and "barnacle ...
The barnacle creates a crown-shaped shell, and in most instances, deeply embeds itself into the skin for stability while riding a fast-moving host. The shell plates are made of calcium carbonate and chitin. Whale barnacles may live for up to a year, and often slough off along migration routes or at whale calving grounds.
Sacculina. Sacculina is a genus of barnacles that is a parasitic castrator of crabs.They belong to a group called Rhizocephala.The adults bear no resemblance to the barnacles that cover ships, whales, and piers; they are recognised as barnacles because their larval forms are like other members of the barnacle class Cirripedia.
Identification of barnacles in the field can be challenging, and identification of particular species of Chthamalus is not considered reliable in the field other than a few species. However, a notable distinction in the arrangement of wall plates can help biologists distinguish Chthamalid barnacles from the other common barnacles in the family ...
Acorn barnacle and acorn shell are vernacular names for certain types of stalkless barnacles, generally excluding stalked or gooseneck barnacles. As adults they are typically cone-shaped, symmetrical, and attached to rocks or other fixed objects in the ocean.
The word barnacle is a slang term used in electrical engineering to indicate a change made to a product on the manufacturing floor that was not part of the original ...
The barnacle goose myth is a widely-reported historical misconception about the breeding habits of the barnacle goose (Branta leucopsis) and brant goose (Branta bernicla). [1] One version of the myth is that these geese emerge fully formed from goose barnacles ( Cirripedia ). [ 2 ]