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Malleus regula, Straight hammer oyster

Common name (e.g. turtle)

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Malleus regula   (Forsskål, 1775)

Straight hammer oyster

Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Malleus regula  AquaMaps  Data sources: GBIF OBIS
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Image of Malleus regula (Straight hammer oyster)
Malleus regula

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Ostreida | Malleidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthic; depth range 0 - 20 m (Ref. 348).  Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-West Pacific and the Mediterranean: from East Africa, to Melanesia; north to South China and Taiwan Province of China and south to Indonesia; south and eastern parts of the Mediterranean. Tropical to subtropical climates.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 12.0 cm SHL male/unsexed; (Ref. 348); common length : 8.0 cm male/unsexed; (Ref. 348)

Biology     Glossary (e.g. epibenthic)

Locally collected at low tide by coastal people when abundant (Ref. 348). Attached by their strong byssus to hard substrates where mud occurs, with the shell vertically disposed and the dorsal margin lying on the rock surface, or to the underside of ledges and boulders. Often in dense colonies (maximum recorded density of 870 individuals/m^2), sometimes forming mixed natural beds with Isognomon isognomum. Littoral and sublittoral (Ref. 348).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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.

Main reference References | Coordinator | Collaborators

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

IUCN Red List Status (Ref. 130435: Version 2024-2)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses


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Estimates based on models

Preferred temperature (Ref. 115969): 22.1 - 29.3, mean 28.2 (based on 4092 cells).
Vulnerability (Ref. 71543): Low vulnerability (10 of 100).
Price category (Ref. 80766): Unknown.

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