Prorocentrum gracile

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Taxonomic Group:Dinoflagellate
Trophic Status:Autotrophic
Size Range:19-20.9 μm wide x 43.7-47.5 μm long (LUMCON Guide); 40-60 μm long (Dodge 1982, Horner 2002)
Key Characteristics:Cell elongate with rounded anterior end and pointed posterior end; anterior winged spine long and sharp with a broad base; body at least and sometimes more than 2X as long as broad
Confused With:Prorocentrum micans, which has a shorter spine and a broader body (less than 2X long as broad); Prorocentrum triestinum, which has a more blunt posterior end, a less robust spine, and is much smaller, usually less than 30 μm long
Toxin:None known