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Tegillarca granosa   (Linnaeus, 1758)

granular ark

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Tegillarca granosa   AquaMaps   Data sources: GBIF OBIS
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Image of Tegillarca granosa (granular ark)
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Classification Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Arcoida | Arcidae

Main reference References | Biblio | Coordinator | Collaborators

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

Size / Weight / Age

Max length : 9.0 cm TL male/unsexed; (Ref. 348); common length : 6.0 cm TL male/unsexed; (Ref. 348)


Benthic; brackish; depth range 0 - 20 m (Ref. 101198)

Climate / Range

Tropical; 46°N - 39°S, 26°E - 134°W (Ref. 106948)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions


Short description

Shell equivalve, thick and solid, ovate, strongly inflated, slightly longer than high and feebly inequilateral. Umbones strongly protruding, cardinal area rather large. About 18 radial ribs (15 to 20) with wide interstices at each valve; ribs stout and distinctly rugose, bearing regular, often rectangular nodules. Periostracum rather thin and smooth. Internal margins with strong crenulations corresponding with the external radial ribs. No byssal gape. Colour: outside of shell white under the yellowish brown periostracum. Inner side white, often tinged yellow towards the umbonal cavity.

Biology     Glossary (e.g. epibenthic)

This represents the most important commercial ark (Ref. 348). Lives in intertidal and shallow subtidal waters. On muddy bottoms, mainly in protected bays and estuaries, or in mangroves. Often occurring in dense populations (Ref. 348). Typically found in the intertidal with silty bottoms with low salinity. A filter-feeder and a shallow burrower. Primarily feeds on organic detritus, phytoplankton and detritus (Ref. 101198). 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


Human uses

Fisheries: commercial
FAO(Aquaculture: production; fisheries: production) | FisheriesWiki | Sea Around Us

Internet sources

BHL | BOLD Systems | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | FAO(fisheries: species profile; publication : search) | GenBank (genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | ispecies | National databases | PubMed | Scirus | Sea Around Us | 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)