GeoChemBio.com/Lancelet

 

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Branchiostoma floridae, lancelet, amphioxus

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Taxonomy

cellular organisms - Eukaryota - Fungi/Metazoa group - Metazoa - Eumetazoa - Bilateria - Coelomata - Deuterostomia - Chordata - Cephalochordata - Branchiostomidae - Branchiostoma - Branchiostoma floridae

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Brief facts

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Lancelet anatomy and embryology

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Developmental stages (life cycle)

Life Cycle Stages

Sexes are separate, and each individual breeds at about 12-day interval throughout the summer. In nature spawning is induced by a drop in light level at sundown, in lab settings it can be induced by mild electrical shock.

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Appendix: Amphioxus photo, a drawing, and a song

 

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Garcia-Fernàndez J. Amphioxus: a peaceful anchovy fillet to illuminate Chordate Evolution (I). Int J Biol Sci. 2006;2(2):30-1. PMID: 16733530

Adult amphioxus of the species Branchiostoma lanceolatum with mature gonads (yellow).
Adult amphioxus
Original drawing (fig No. 11) and description of the amphioxus, Branchiostoma lanceolatum, originally classified as a mollusk. From ref. Pallas PS., 1774
Original drawing of amphioxus
The amphioxus song "Its a long way from amphioxus".
Amphioxus song
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References

PubMed articles

Websites

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