Dino ID Needed

[Bear22]

Can anybody take a crack at these? I can try for a better photo if needed.

 

[Bear22]

Second picture with slide cover this time:

 

[EnterName]

Very small (low magnification), but it looks like a Prorocentrum species.

Concave at the apical "tip" (red arrow heads) and visible centric pyrenoid (blue arrow heads).

 

[Bear22]

Yep, that small "dimple" is present on one end of these guys.

 

[EnterName]

Yep, that small "dimple" is present on one end of these guys.

That's pretty common for Prorocentrum and helps to distinguish them from Amphidinium-like dinoflagellates. Ostreopsis has usually a pointy end and rotates around to move rather than swimming in straight lines, so if your cells move this can be used to differentiate them as well. Coolia-like dinoflagellates a more spherical and often darker and also like to move in circles or "rotate" around.

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(Source: Hoppenrath et al. 2013)​