Alexandrium margale

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 : 544-545

3.1.5 Alexandrium margale fi i Balech ( Figures 22–24 )

References: Hallegraeff et al. 1991, 580, figs 10–16; Balech 1994, 220, figs 12–15; Balech 1995, 78, pl. XVI, figs 19–32; Hallegraeff et al. 2010, 186, figs 4.18F, 4.19D.

Solitary cells of medium-size, subspherical shaped, longer than wide ( Figure 22 ). The epitheca is convex ( Figure 23 ), wide and excavated cingulum, and the hypotheca is convex ( Figure 24 ). The first apical plate (1′) is not connected with Po, is quadrilateral and has a small ventral pore on its upper margin ( Figure 23 ). The posterior sulcal plate (Sp) has an oblique anterior border.

Measurements: 26–36 μm L, 26–35 μm W (Table 1).

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

Distribution: in the middle of the Gulf of California.

Figures

Figures 22–24: Alexandrium margalefii, LM.(22) General outline of a cell. (23) An empty cell in ventral view showing 1′ and 6″ and the ventral pore (arrow) in the first apical plate (1′). (24) Hypotheca with plate tabulation.