Clarifying cyst-motile stage relationships in dinoflagellates

2017 ◽  
pp. 325-350 ◽  
Author(s):  
K. Matsuoka ◽  
M. J. Head
Keyword(s):  
Motile Stage

scholarly journals A marine fungus Plectospira dubia n.sp. [Saprolegniaceae], infecting crustacean eggs and small Crustacea

1954 ◽  
Vol 33 (3) ◽  
pp. 721-732 ◽  
Author(s):  
D. Atkins
Keyword(s):  
Marine Fungus ◽  
Variable Length ◽  
Second Stage ◽  
Short Period ◽  
Motile Stage

SummaryA marine fungus, Plectospira dubia n.sp., has been found infecting crustacean eggs and small Crustacea in the Plymouth Laboratory. It has the following characteristics: mycelium mostly intra-matrical, coarse, hyphae 50–100µ in diameter. Sporangia irregularly inflated, emptying by efferent hyphae of variable length and frequently of irregular diameter; sometimes proliferous; wall persistent. Zoospores dicystic and dimorphic, but the first swimming stage largely suppressed, the first zoospores mostly encysting within the sporangium after a short period of feeble activity, then swimming in the second stage. The first zoospores pyriform and flagellate (probably biflagellate): in the second motile stage laterally grooved with two laterally inserted flagella. First zoospores about 1oµ long, when encysted 7–8µ in diameter; in the second motile stage 11–12µ long, when encysted 6–7µ. in diameter. Gemmae numerous, spherical, up to 1OOµ. in diameter. Sexual organs so far unknown.

Dinoflagellate cyst distribution around the British Isles

1972 ◽  
Vol 52 (4) ◽  
pp. 939-944 ◽  
Author(s):  
Philip C. Reid
Keyword(s):  
Red Tide ◽  
Irish Sea ◽  
Intertidal Sediment ◽  
British Isles ◽  
Present Evidence ◽  
Gonyaulax Polyedra ◽  
Large Numbers ◽  
First Time ◽  
Potential Conditions ◽  
Motile Stage

Rich assemblages of acid-resistant microfossils occur in intertidal sediment from the British Isles and are here reported, for the first time, to contain large numbers of dino-flagellate cysts. These cysts provide evidence to show that the distribution of certain dino-flagellate cysts is different from that of the motile stage, that the coastal distribution of cysts appears to be controlled by currents and that their occurrence within bays is possibly related to localized temperature and salinity conditions. Further, they present evidence that potential conditions for a red tide of Gonyaulax polyedra Stein may be present in the east Irish Sea.

The cyst-motile stage relationships of the dinoflagellatesDiplopelta symmetricaandDiplopsalopsis latipeltata

1993 ◽  
Vol 28 (2) ◽  
pp. 129-137 ◽  
Author(s):  
Barrie Dale ◽  
Marina Montresor ◽  
Adriana Zingone ◽  
Karin Zonneveld
Keyword(s):  
Motile Stage
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