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Almazán Becerril, A.; Hernández-Becerril, D. U. (2002). Dinophysis siankanensis, a new species of planktonic dinoflagellate (Dinophyceae) from the Mexican Caribbean Sea. Phycologia. 41(4): 374-381.
238103
10.2216/i0031-8884-41-4-374.1 [view]
Almazán Becerril, A.; Hernández-Becerril, D. U.
2002
Dinophysis siankanensis, a new species of planktonic dinoflagellate (Dinophyceae) from the Mexican Caribbean Sea
Phycologia
41(4): 374-381
Publication
We describe a new species of dinoflagellate, Dinophysis siankanensis Almazán & Hernández-Becerril sp. nov., from material collected in a coastal lagoon in the Mexican Caribbean. Net plankton samples were taken at sites in the northern coastal lagoon complex of Bahía de la Ascención, within the Reserve of Sian Ka'an, Máxico, at different seasons from 1996 to 1999. Cells of D. siankanensis were collected from one location where salinity was 10 psu and temperature was 28°C. Specimens were studied by light and scanning electron microscopy. The outline of the body is the main diagnostic morphological character: the cells are laterally compressed, the epitheca is reduced and the hypotheca is elongate, with a notable concavity in the ventral margin, below the median line, and the antapical portion of the cells strongly curved towards the ventral area. The anterior cingular flange shows numerous ribs and is well developed; the three ribs of the left sulcal flange are equally distant. The ornamentation of the thecae consists of well-developed areolae, with a pore in each areola. Cells are 68–70 μm long and 38–41 μm wide. The ecological isolation of the populations also supports the erection of a new species. Dinophysis siankanensis superficially resembles D. caudata f. acutiformis. Comparison is also made with other species of the genus.
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Dinophysis siankanensis Almazán & Hernández-Becerril, 2002 (original description)