conch


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conch

(kŏngk, kŏnch, kôngk), common name for certain marine gastropodgastropod,
member of the class Gastropoda, the largest and most successful class of mollusks (phylum Mollusca), containing over 35,000 living species and 15,000 fossil forms.
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 mollusks having a heavy, spiral shell, the whorls of which overlap each other. In conchs the characteristic gastropod foot is reduced in size and the operculum, a horny plate located on the foot and used to seal the shell opening in many gastropods, has the appearance and function of a claw. During locomotion, the operculum secures a foothold in the sand, and the conch jumps forward by means of the quick contraction of a retractor muscle called the columella muscle. Thus the conch lacks the creeping motion of most gastropods. The king conch, Strombus gigas, found in the warmer waters of the Atlantic, Caribbean, and Gulf of Mexico, has a shell 10 to 12 in. (25–30 cm) long and may weigh up to 5 lb (2.3 kg). Similar in size and distribution is the queen conch, Cassis cameo. Its shell has been used in Europe to carve cameos. Conch shells range in color from white to red; they have been used by humans to fashion a number of items, such as buttons, ornaments, or the crude trumpets made from the shell of the trumpet conch, Charonia tritonis. This conch is similar in shape to the king and queen conchs but is much more slender and reaches a length of 20 in. (50 cm). C. tritonis is found in the Gulf of Mexico and the Indian Ocean. The largest conch and also one of the largest univalves in the world is the horse conch, Pleuroploca gigantea, having a shell length of 24 in. (60 cm). It is found along the Atlantic Coast from North Carolina to Brazil. The body can retreat entirely into the shell and remain there for months if unfavorable conditions prevail. An unusual conch shell is that of the spider conch, Lambis lambis, which has leglike projections. Spider conchs are voracious carnivores, common on coral reefs. They also feed on algae, as do the king conchs. Most conchs are carnivorous, feeding on bivalve mollusks; some are scavengers as well. They inhabit tropical waters and have been used as a food source for man. The conch is classified in the phylum MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
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, class Gastropoda, order Mesogastropoda.

Conch

Semidome vaulting of an apse or eastern end of a church.

conch

[käŋk]
(invertebrate zoology)
The common name for several species of large, colorful gastropod mollusks of the family Strombidae; the shell is used to make cameos and porcelain.

conch

The domed roof of a semicircular apse.

conch

1. any of various tropical marine gastropod molluscs of the genus Strombus and related genera, esp S. gigas (giant conch), characterized by a large brightly coloured spiral shell
2. the shell of such a mollusc, used as a trumpet
References in periodicals archive ?
Furthermore, both the bathymetry of San Andres archipelago (Andrade, 2001) that limit the queen conch dispersion among sites, as well as the environmental and fishing variable conditions, may induce phenotypic differences in the queen conch shells.
Although most common in depths below 25 m, deep-water (>25 m) conch populations can be found throughout the Caribbean, for example, Bahamas, Belize, Martinique, Turks and Caicos, Jamaica, People's Republic of China (Berg Jr 1975, Berg & Olsen 1989, Stoner & Sandt 1991, Appeldoorn 1997, Reynal et al.
This rise in both resident population and visitors places increasing pressure on a limited resource: the queen conch.
When a conch jumps, this spurt-and-leak circulation supplies tissues with four to six times the oxygen delivered when the snail just chills, Lefevre and colleagues report in the Oct.
If the flame structure is not visible in a conch pearl with the unaided eye, it is called porcelaneous (Fritsch and Misiorowski, 1987).
These observations suggest that the pesticides used for mosquito eradication in the Keys have the potential to negatively affect queen conch larvae.
A 1 m snood line connected each pot to the mainline of the string via longline clips affixed at the mainline and at the top of each octopus and conch pot.
To forge closer partnership, Chia Hsin is considering increasing shareholding in Conch, with both sides to strengthen cooperation in the fields of cement, marine transportation and logistics system.
14 January 2010 - Danish cement and minerals systems provider FLSmidth & Co A/S (CPH: FLS) said today it will supply a cement kiln to Chinese player Anhui Conch Cement Co Ltd (HKG: 0914) and will launch equipment designed for the Chinese market.
The event will also feature singing bulls, conch shells, flutes and other sound healing instruments.
plural conchs \'ka[tailed n]ks, 'k[dot][tailed n]ks\ or conch*es \'kan-ch[schwa]z\
again my shell of conch stripped of wax chronicler of stacks of raw