Mactra
| Mactra Temporal range:
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|---|---|
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| Mactra stultorum | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Venerida |
| Family: | Mactridae |
| Genus: | Mactra Linnaeus, 1767 |
| Species | |
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See text | |
Mactra is a genus of medium-sized marine bivalve mollusks or clams, commonly known as trough shells or duck clams. Mactra is the type genus within the family Mactridae.
The word "trough" in the common name refers to the fact that all Mactra shells have a large ligamental pit at the hinge line, which in life contains a large internal ligament. Most bivalves in other families have an external ligament instead.
Species
- Mactra acutissima Cosel, 1995
- Mactra angolensis Cosel, 1995
- Mactra chinensis Philippi, 1846
- Mactra discors Gray, 1873
- Mactra glabrata Linnaeus, 1767
- Mactra glauca Born, 1778
- Mactrotoma fragilis Gmelin, 1791
- Mactra inconstans Cosel, 1995
- Mactra isabelleana d'Orbiginny, 1846
- Mactra micronitida Cosel, 1995
- Mactra murchisoni Deshayes, 1854
- Mactra nitida Spengler, 1786
- Mactra ordinaria (E.A.Smith, 1898)
- Mactra ovata (Gray, 1843)
- Mactra rostrata Spengler, 1802
- Mactra sauliana Gray, 1838
- Mactra silicula Reeve, 1854
- Mactra stultorum (Linnaeus, 1758)
- Mactra tristis (Reeve,1854)
- Mactra vitrea Gray,1837
- Mactra veneriformis (シオフキガイ, shiofukigai in Japanese ; 동죽 조개 in Korean)
- Mactra grandis (Gmelin, 1791)
