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Isognomon alatus

Isognomon alatus, the flat tree oyster, is a species of bivalve mollusc in the family Isognomonidae. It can be found along the Atlantic coast of North America, ranging from southern Florida to Brazil and Bermuda.

Isognomon alatus
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Pteriida
Family: Isognomonidae
Genus: Isognomon
Species:
I. alatus
Binomial name
Isognomon alatus
(Gmelin, 1791) [1]
Synonyms
  • Ostrea alatus Gmelin, 1791
  • Ostrea rostralis Lamarck, 1819
  • Perna ephippium Reeve, 1858
  • Perna obliqua Lamarck, 1819

Description edit

The flat tree oyster has two thin, irregularly shaped valves joined by a long straight hinge. The exterior is sculptured by a large number of rough, concentric rings with loose flakes and varies in colour from a pale brownish olive to a purplish black. The nacre on the inside is lustrous and cream coloured shaded with purplish brown. The shell is attached to the substrate by a byssus thread and grows to about 75 to 95 millimetres (3.0 to 3.7 in) in length.[2]

Distribution and habitat edit

The flat tree oyster is found in southern Florida, the Caribbean Sea and Gulf of Mexico, Colombia, Costa Rica, Cuba, Jamaica, Lesser Antilles, Puerto Rico, Venezuela, San Andrés and Brazil.[1][3] It is one of three closely related species that are found, sometimes in dense patches, on the roots of mangroves, especially the red mangrove (Rhizophora mangle) and on shallow rocky areas, down to depths of 15 metres (49 ft) or more. On coral reefs it occurs on rock ledges and exposed rocks in areas of high sedimentation, forming mats of hundreds of individual animals. It also grows on the shells of the Atlantic thorny oyster (Spondylus americanus).[4]

Biology edit

The flat tree oyster is a filter feeder, drawing water into its shell and passing it through its gills, extracting plankton and small organic particles in the process.[2]

Breeding takes place after heavy rain has lowered the salinity of the water. Most of the adult oysters in the area take part in a mass spawning event when they all liberate their gametes at the same time. Fertilisation takes place in the water column and the larvae are planktonic. When they have passed through several developmental stages they settle to the seabed, undergo metamorphosis and attach themselves with byssus threads as miniature adults.[2]

References edit

  1. ^ a b Huber, Markus (2010). "Isognomon alatus (Gmelin, 1791)". WoRMS. World Register of Marine Species. Retrieved 2012-10-03.
  2. ^ a b c Melany P. Puglisi; Maribel Thiebaud (2008). "Isognomon alatus Gmelin, 1791". Smithsonian Marine Station at Fort Pierce. Retrieved 2012-10-03.
  3. ^ Abbott, R.T. & Morris, P.A. A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies. New York: Houghton Mifflin, 1995. 22.
  4. ^ Colin, Patrick L. (1978). Marine Invertebrates and Plants of the Living Reef. T.F.H. Publications. p. 390. ISBN 0-86622-875-6.

isognomon, alatus, flat, tree, oyster, species, bivalve, mollusc, family, isognomonidae, found, along, atlantic, coast, north, america, ranging, from, southern, florida, brazil, bermuda, scientific, classificationdomain, eukaryotakingdom, animaliaphylum, mollu. Isognomon alatus the flat tree oyster is a species of bivalve mollusc in the family Isognomonidae It can be found along the Atlantic coast of North America ranging from southern Florida to Brazil and Bermuda Isognomon alatusScientific classificationDomain EukaryotaKingdom AnimaliaPhylum MolluscaClass BivalviaOrder PteriidaFamily IsognomonidaeGenus IsognomonSpecies I alatusBinomial nameIsognomon alatus Gmelin 1791 1 SynonymsOstrea alatus Gmelin 1791Ostrea rostralis Lamarck 1819Perna ephippium Reeve 1858Perna obliqua Lamarck 1819 Contents 1 Description 2 Distribution and habitat 3 Biology 4 ReferencesDescription editThe flat tree oyster has two thin irregularly shaped valves joined by a long straight hinge The exterior is sculptured by a large number of rough concentric rings with loose flakes and varies in colour from a pale brownish olive to a purplish black The nacre on the inside is lustrous and cream coloured shaded with purplish brown The shell is attached to the substrate by a byssus thread and grows to about 75 to 95 millimetres 3 0 to 3 7 in in length 2 Distribution and habitat editThe flat tree oyster is found in southern Florida the Caribbean Sea and Gulf of Mexico Colombia Costa Rica Cuba Jamaica Lesser Antilles Puerto Rico Venezuela San Andres and Brazil 1 3 It is one of three closely related species that are found sometimes in dense patches on the roots of mangroves especially the red mangrove Rhizophora mangle and on shallow rocky areas down to depths of 15 metres 49 ft or more On coral reefs it occurs on rock ledges and exposed rocks in areas of high sedimentation forming mats of hundreds of individual animals It also grows on the shells of the Atlantic thorny oyster Spondylus americanus 4 Biology editThe flat tree oyster is a filter feeder drawing water into its shell and passing it through its gills extracting plankton and small organic particles in the process 2 Breeding takes place after heavy rain has lowered the salinity of the water Most of the adult oysters in the area take part in a mass spawning event when they all liberate their gametes at the same time Fertilisation takes place in the water column and the larvae are planktonic When they have passed through several developmental stages they settle to the seabed undergo metamorphosis and attach themselves with byssus threads as miniature adults 2 References edit a b Huber Markus 2010 Isognomon alatus Gmelin 1791 WoRMS World Register of Marine Species Retrieved 2012 10 03 a b c Melany P Puglisi Maribel Thiebaud 2008 Isognomon alatus Gmelin 1791 Smithsonian Marine Station at Fort Pierce Retrieved 2012 10 03 Abbott R T amp Morris P A A Field Guide to Shells Atlantic and Gulf Coasts and the West Indies New York Houghton Mifflin 1995 22 Colin Patrick L 1978 Marine Invertebrates and Plants of the Living Reef T F H Publications p 390 ISBN 0 86622 875 6 Retrieved from https en wikipedia org w index php title Isognomon alatus amp oldid 1047646936, wikipedia, wiki, book, books, library,

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