A small lancelet which is caught for food in parts of Asia.
- Genus Branchiostoma (formerly Amphioxus), family Branchiostomidae.
- Thus amphioxus is the only chordate species in which distinct insulin and IGF genes have not been found.
- Organisms along the lines of the cephalochordate amphioxus use the gill apparatus for filter feeding.
- The cephalochordate amphioxus is the closest living invertebrate relative of the vertebrates and therefore the best model organism for understanding the composition of the ancestral chordate genome.
Mid 19th century: modern Latin, from amphi- + Greek oxus 'sharp'.
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Line breaks: amphi|oxus
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