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 ?
The sea snails save their jumping for conch emergencies, such as when they detect dissolved body odor from the deadly cone snail Conus marmoreus.
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.
Florida landings data for true tulip snails, lightning whelks, and horse conchs were collected from commercial harvesters and dealers from 1994 through 2011 and are represented graphically by Gulf and Atlantic coasts in Figure 4.
Compared with the mean number of individuals caught per year during the entire 18-y period, the 5-y (2007 through 2011) average number of true tulips was 45% less, the average number of horse conchs was 89% less, and the average number of lightning whelks was 82% greater.
The freedom they talk about birthed the Conch Republic in 1982, when the U.
Highway 1) to the "0' mile marker at Key West takes a mere three hours, travelers opting for a more leisurely ramble will find a variety of pleasures along the way, from conch cuisine to creature encounters.
Information shared by fishermen from Las Perlas about the distribution of sites in which adult conchs were abundant was geo-referenced and compared with the distribution of conch densities resulting from our survey.
galeatus in Las Perlas and Coiba were very low, we performed a growth analysis on 88 tagged conchs from Coiba Archipelago that were followed between 1999 and 2000 (data partially analyzed in Vega & Perez 2003).
Honduras' closed seasons for crustaceans and conchs.
And last but not least, what is the putative danger of transmission to natural predators and humans when the queen conchs are eaten raw?
In the last decade significant progress has been made in our understanding of the general biology, habitat requirements, distribution, and mortality processes that influence populations of juvenile conch.