Alexandrium tropicale Balech

Hernández-Becerril, David U., Pichardo-Velarde, Jorge G., Alonso-Rodríguez, Rosalba, Maciel-Baltazar, Ebodio, Morquecho, Lourdes, Esqueda-Lara, Karina, Barón-Campis, Sofía A. & Quiroz-González, Nataly, 2023, Diversity and distribution of species of the planktonic dinoflagellate genus Alexandrium (Dinophyta) from the tropical and subtropical Mexican Pacific Ocean, Botanica Marina (Warsaw, Poland) 66 (6), pp. 539-557 : 548-549

3.1.11 Alexandrium tropicale Balech ( Figures 67–69 )

Reference: Balech 1995, 46, pl. IX, figs 11–27.

Species either solitary or cells paired. Cells are rounded, small, longer than wide, with non-pronounced shoulders, excavated cingulum, not prominent apical pore, and convex hypotheca ( Figure 67 ). Plate 1′ has a very little connection with Po, and is rhomboid, larger than wide, with a ventral pore ( Figure 68 ). Po has a large foramen ( Figure 68 ). The posterior sulcal plate (Sp) is irregular and has no pore

( Figure 69 ).

Measurements: 28–38 μm L, 22–33 μm W (Table 1).

Toxicity: this species is not considered to be toxic ( Long et al. 2021).

Distribution: in the central Mexican Pacific.

Figures

Figures 67–69: Alexandrium tropicale, LM. (67) Pair of cells. (68, 69) Epitheca and hypotheca with plate tabulation.