takayama helix takayama helix takayama helix is a species of dinoflagellates with sigmoid apical grooves first found in tasmanian and south african waters. it contains fucoxanthin and its derivatives as its main accessory pigments. takayama helix scientific classification domain: eukaryota (unranked): sar (unranked): alveolata phylum: dinoflagellata class: dinophyceae order: brachidiniales family: brachidiniaceae genus: takayama species: takayama helixde salas et al., 2003 takayama helix has an apical groove being practically straight while still clearly bent. it possesses one ventral pore. it has various peripheral, strap-shaped, spiraling chloroplasts with unique pyrenoids and an ellipsoidal nucleus.