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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 ...
Their body plan is uniquely reduced in an extreme adaptation to their parasitic lifestyle, and makes their relationship to other barnacles unrecognisable in the adult form. The name Rhizocephala derives from the Ancient Greek roots ῥίζα ( rhiza , "root") and κεφαλή ( kephalē , "head"), describing the adult female, which mostly ...
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 and piers; they are recognised as barnacles because their larval forms are like other members of the barnacle class Cirripedia.
The adult barnacle bears no resemblance to an acorn barnacle, but the larval development is typical of a barnacle, with four nauplius larval stages and one cyprid larval stage. [2] The female cyprid larva of L. panopaei has a spear-like stylet.
Hemioniscus balani parasitically castrates adults of several species of barnacles, including Semibalanus balanoides, [2] Chthamalus fissus, Chthamalus dalli, and Balanus glandula. Rarely does more than one H. balani parasitize the same host, [ 3 ] but under conditions of heavy infestation, a single barnacle may contain as many as seven H ...
Elminius modestus) is a species of barnacle in the family Elminiidae, native to Australia, Tasmania and New Zealand, but now spread to Britain and the north west coasts of Europe. [1] It reaches a maximum size of about 10 millimetres ( 3 ⁄ 8 in) in diameter.
This list may not reflect recent changes. (previous page) Barnacle; Cirripedia; List of prehistoric barnacles * List of Cirripedia genera; A. Acrothoracica;
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. [1]