| Major Taxonomic
Group: Dinoflagellates
Size and Shape:
9-14 µm in
length, epicone is larger than hypocone.
Plastids and
Pigments: None present
except as food particles.
Distinguishing
features: The larger
and broader epicone gives H. rotundata the appearance of a
mushroom
or arrowhead.
Distribution:
Cosmopolitan, primarily
found in temperate to tropical estuarine waters.
Impact:
Sometimes known as a mohogany
tide, H. rotundata has caused large nuisance blooms in several
portions
of the world.
References:
Lewitus,
A.J., Schmidt, L.B.,
Mason, L.J., Kempton, J.W., Wilde, S.B., Wolny, J.L., Williams, B.J.,
Hayes,
K.C., Hymel, S.N., Keppler, C.J., and Ringwood, A.H. (2003) Harmful
algal
blooms in South Carolina residential and golf course ponds. Population
and Environment. 24: 387-413.
Hansen,
G. 1989. Ultrastructure
and morphogenesis of scales in Katodinium rotundatum (Lohmann) Loeblich
(Dinophyceae). Phycologia., 28: 385-394.
Hansen,
G. 1995. Analysis
of the thecal plate pattern in the dinoflagellate Heterocapsa rotundata
(Lohmann) comb. nov. (= Katodinium rotundatum (Lohmann) Loeblich).
Phycologia.,
34: 166-170.
Lohmann,
H. 1908. Untersuchungen
zur Feststellungen des vollständigen Gehaltes des Meeres an
Plankton.
Wissensch. Meeresuntersuchungen, Abt. Kiel, NF., 10: 131-370.
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