Gymnodinium beii

Super Group: 
Alveolata
Phylum: 
Dinophyta
Class: 
Dinophyceae
Order: 
Gymnodiniales
Family: 
Gymnodiniaceae
Genus: 
Gymnodiniu
Species: 
beii
Authority: 
H.J.Spero 1987

Diagnosis

Motile stage: Unicellular; oblate spheroid; average length, 8.1  μm (range 7.1-9.1  μm), average width, 5.6 pm (range 5.0-6.4  μm); thecal vesicles present, no thecal plate; epicone rounded to slightly conical; hypocone, rounded to slightly conical with distinct flange projecting over sulcus from left side; cingulum wide, displaced one times its width; sulcus deep, narrower than cingulum, anterior end at hypocone flange, posterior end at antapex; longitudinal flagellum length 1.5 times body length; chloroplasts peripheral; thylakoids contain three lamellae; major light-harvesting pigment peridinin; two or more stalked pyrenoids penetrated by several thylakoid lamellae; typical dinokaryon nucleus; no trichocysts or stigma; swimming behavior characterized by darting motion with rapid changes in direction.
Non-motile symbiotic stage: Oblate spheroid more tapered than motile stage; length 8-12 pm, width 4-5  μm; no flagella; cingulum and sulcus not evident.

Type species

The type species (lectotype) of the genus Gymnodinium is Gymnodinium fuscum (Ehrenberg) Stein.

Observation site(s)

ASQME static network (beta)

ASQME dynamic network (beta)

ASQME map (beta)