Cirripedia


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Cirripedia

[‚sir·ə′pēd·ē·ə]
(invertebrate zoology)
A subclass of the Crustacea, including the barnacles and goose barnacles; individuals are free-swimming in the larval stages but permanently fixed in the adult stage.

Cirripedia

 

an order of crustaceans. Members of the order are sessile. Some parasitize other animals, mainly decapods.

The body of nonparasitic representatives, for example, members of the superfamilies Balanomorpha and Lepadomorpha, is covered with a mantle that excretes calcareous plates, forming the shell. The height of the shell is 1–40 cm. The body, which is divided into a head, thorax, and abdomen, has antennules on the head that are converted into organs of attachment. There are also oral extremities on the head. The thorax has six pairs of long, segmented cirri, by means of which the crustacean forces water with food particles (tiny organisms) into its mantle cavity.

Most members of the family are hermaphroditic; some have supplementary dwarfed males. The saclike body of parasitic species lacks a shell, extremities, and an intestine. The organism hatches from an egg and develops into a nauplius, which is then transformed into a cypris larva. The Cirripedia live in seas, attaching themselves to solid objects. The Balanomorpha foul the bottoms of seagoing vessels.

The Cirripedia include approximately 700 species. Seas of the USSR, except the Caspian and Aral seas, have approximately 50 species.

REFERENCES

Darwin, C. Usonogie raki: Sochineniia, vol. 2. Moscow-Leningrad, 1936.
Zhizn’ zhivotnykh, vol. 2. Moscow, 1968.
Tarasov, N. I., and G. B. Zevina. Usonogie raki (Cirripedia Thoracica) morei SSSR. Moscow-Leningrad, 1957. (Fauna SSSR: Novaia seriia, no. 69.)
Dogel’, V. A. Zoologiia bespozvonochnykh, 6th ed. Moscow, 1975.

A. V. IVANOV

References in periodicals archive ?
Crustacea fauna of Taiwan: Barnacles, 1- Cirripedia: Thoracica excluding the Pyrgomatidae and Acastinae.
Interesting records of whale epizoic crustaceans from the Dutch North Sea coast (Cirripedia, Amphipoda).
Comparison of larval and adult stages of Chthamalus dalli and Chthamalus fissus (Cirripedia: Thoracica).
Our study examines the swimming motions and morphology of plumose setae on cyprids of several barnacle species in the clade Cirripedia, particularly the thoracican species Balanus glandula, to specifically describe setal and setule morphology and to hypothesize how their morphology influences their swimming strokes.
Los principales taxones responsables de la tendencia observada fueron Copepoda (Calanoida y Harpaticoida), Cirripedia, Cladocera y Brachyura.
Observation on the relationship between Octolasmis grayii (Darwin, 1851) (Cirripedia, Thoracica) and certain Marine snakes (Hydrophiidae).
Eleven meroplankton groups were identified in the mesozooplankton of Guarairas, including larvae of Gastropoda and Pelecypoda, Cirripedia, Brachyura and Polychaeta.
The barnacle, Xenobalanus globicipitis (Cirripedia, Coronulidae), attached to the bottle-nosed dolphin, Tursiops truncatus (Mammalia, Cetacea) on the southeastern coast of India.
10:30 IDENTIFICATION OF THE EPIBIONT, CHELONIBIA TESTUDINARIA (CIRRIPEDIA: BALANOMORPHA: CORONULOIDEA) ASSOCIATED WITH ARCHAEOLOGICAL SEA TURTLE REMAINS FROM THE NORTH STORR'S LAKE SITE (SS-4), SAN SALVADOR, BAHAMAS, Jeffrey P.
negatively affects Balanus balanoides (L.) (Cirripedia thoracia) in tidepools.