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Isognomon ephippium   (Linnaeus, 1758)

saddle tree oyster

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Isognomon ephippium   AquaMaps   Data sources: GBIF OBIS
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Image of Isognomon ephippium (saddle tree oyster)
Picture by FAO

Classification Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Pterioida | Isognomonidae

Main reference References | Biblio | Coordinator | Collaborators

Poutiers, J.M. 1998. (Ref. 348)

Size / Weight / Age

Max length : 14.0 cm SL male/unsexed; (Ref. 348); common length : 10.0 cm SL male/unsexed; (Ref. 348)

Environment

Benthic; brackish

Climate / Range

Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-West Pacific: from East Africa, to Melanesia; north to Japan and south to Indonesia.

Short description

Shell variable, irregularly rounded in outline, with height about equal to length. Dorsal margin straight and relatively short, not expanded posteriorly in a wing-like ear. Anterior margin sharply sinuous dorsally, ventrally strongly convex and extending well forward of umbones. Posterior margin slightly concave, forming an obsolete angulation with the rounded ventral margin. Umbones small, pointing at anterior end of dorsal margin. Outer surface covered with concentric lamellar processes, with very low radial ridge ending at posteroventral angulation. Ligamental area with a dozen transverse grooves. Nacreous area of the inner side of shell surrounded by a broad, non-nacreous margin. Colour: outside of shell horny to purplish brown. Interior nacreous, with a broad dark brown margin.

Biology     Glossary (e.g. epibenthic)

Attached to rocks and other hard substrates, in marine and brackish water areas. Common in muddy estuaries and mangrove where it attaches to prop roots. Littoral and shallow subtidal levels (Ref. 348). Members of the class Bivalvia are mostly gonochoric, some are protandric hermaphrodites. Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).

IUCN Red List Status (Ref. 114614)

   

CITES status (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless

Human uses


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More information

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FAO areas
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Ecology
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Common names
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Predators
Reproduction
Maturity
Spawning
Eggs
Egg development
Age/Size
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Length-weight
Length-length
Morphology
Larvae
Abundance
References
Mass conversion

Internet sources

BHL | BOLD Systems | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | ispecies | National databases | PubMed | Scirus | FishBase | Tree of Life | uBio | uBio RSS | Wikipedia (Go, Search) | Zoological Record

Estimation of some characteristics with mathematical models

Vulnerability (Ref. 71543)
Low vulnerability (10 of 100)
Price category (Ref. 80766)
Unknown