| Semimytilus algosus | |
|---|---|
|   | |
|  Scientific classification   | |
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Bivalvia | 
| Order: | Mytilida | 
| Family: | Mytilidae | 
| Genus: | Semimytilus | 
| Species: | S. algosus  | 
| Binomial name | |
| Semimytilus algosus (Gould, 1850)  | |
| Synonyms | |
Semimytilus algosus is a species of mussels. A common name for this species is Dwarf mussel. [1] It is the first species where trioecy was reported in the phylum Mollusca. [2]
Individuals can be up to 42 or 50 millimetres (1.7 or 2.0 in) in size. [3]
In the past this species was described as simultaneous hermaphroditic but it was later confirmed the species is trioecious. It is believed this species evolved from a gonochoric ancestor. [2]
Its habitat is rocky shores. [4] The species has been found off the coasts of South Africa and is native to Chile. [5] The species is also invasive off the coast of Angola and Namibia. [6]
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