These dinoflagellates are blooming in the seawater system at Long Marine Lab. The cells a golden green color (not golden red, as in Akashiwo sanguinea) and the largest are 35-40 microns long. They do not appear to form chains.
Light micrograph of the dinoflagellate Dinophysis acuminata Claparède & Lachmann 1859.
Phylum, Myzozoa; Class, Dinophyceae; Order, Dinophysiales; Family, Dinophysiaceae.
A marine armoured dinoflagellate; a small species of Dinophysis, with reported cell length of 38-56 microns (Hoppenrath et al. 2009). Cells are oval to elliptical in shape and elongated. Laterally flattened (compressed). Posterior is rounded. Epitheca is much smaller than the hypotheca. The surface is covered by circular areolae each with a small pore (see SEM images). Small protuberances are sometimes present at the posterior end of the cell. The left sulcal list (flange extension of the thecal plates) is developed but narrow and of even width, extending halfway or a little beyond the midpoint of the cell. It is reported that D. acuminata has a range of morphologies, rendering its taxonomic position somewhat uncertain (Plankton*Net and Kraberg and Montagnes 2012). Theca is covered by 19 plates. Some populations are bioluminescent and may cause DSP (diarrheic shellfish poisoning in humans) toxins (okadaic acid). Is mixotrophic; has chloroplasts and is also known to be phagotrophic (uses it's peduncle to extract cell contents of the prey organism).
20 micron net collection from surface waters in Porlier Pass, between Galiano Island and Valdes Island, Southern Gulf Islands, British Columbia, Canada. Aug 5, 2012.
LM image of the dinoflagellate Neoceratium furca (Ehrenberg) F. Gomez, D. Moreira & P. Lopez-Garcia 2010 (taxonomic synonym of Ceratium fusus (Ehrenberg) Dujardin 1841.
Class, Dinophyceae; Subclass, Peridiniphycidae; Order, Gonyaulacales; Family, Ceratiaceae.
Elongated and spindle-shaped body. Both horns, apical and antapical, approximately equal length. Both horns are gradually tapering and slightly bent or straight. The right antapical horn is very small to an almost non-existent tooth-like form. Widest part of the cell is at the cingulum, medially located. Many yellow-brown chloroplasts. Cells are reported to be 300-600 m long and 20-30 m wide (Hoppenrath et al. 2009) and 200-300 m long by 15-30 m wide (Al-Kandari et al. 2009). Bioluminescence reported.
A cosmopolitan species, reported from tropical to temperate marine waters. Can form thick blooms, though not reported to be toxic.
Discolored mud attributed to red tide prevalent in area.
Robinson Preserve, Manatee Co., FL.
Not certain. But it is definitely in the Order Noctilucales
Not certain. But it is definitely in the Order Noctilucales.
Possibly sp. kofoidi or even schwartzi
The dinoflagellates (Greek δῖνος dinos "whirling" and Latin flagellum "whip, scourge") are a large group of flagellate protists. Most are marine plankton, but they are common in fresh water habitats as well. Their populations are distributed depending on temperature, salinity, or depth. Many dinoflagellates are known to be photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey, (phagotrophy). In terms of number of species, dinoflagellates form one of...