Alexandrium, Halim, 1960

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 : 542

publication ID

https://doi.org/ 10.1515/bot-2023-0037

DOI

https://doi.org/10.5281/zenodo.11094879

persistent identifier

https://treatment.plazi.org/id/03E50944-FFB4-2A1B-4E98-E730FA3DFCF7

treatment provided by

Felipe

scientific name

Alexandrium
status

 

3.1.1 Alexandrium a ffi ne (Inoue et Fukuyo) Balech ( Figures 2–8 View Figures 2–8 )

References: Balech 1995, 55, pl. XIII, figs 20–36; Usup et al. 2002, 267, figs 2 A–D; Gu et al. 2013, 72, figs 2 A–D; Lassus et al. 2016, 42, pl. 2 A–E; Kim et al. 2017, 428, figs 1 A–L.

Synonyms = Protogonyaulax affine Inouye et Fukuyo

Chain-forming species, with chains of 3–8 cells observed ( Figures 2 and 3 View Figures 2–8 ). Individual cells of medium-size, slightly longer than wide ( Figures 2 and 3 View Figures 2–8 ). The epitheca is domed to conical, cingulum excavated and the hypotheca is concave ( Figure 4 View Figures 2–8 ). The first apical plate (1′) is rhomboidal, in contact with Po, and with a small ventral pore on its right margin ( Figures 5 and 6 View Figures 2–8 ). The apical complex pore is conspicuous, with a large connecting pore and a relatively small foramen, both aligned in the same axis ( Figures 6 and 7 View Figures 2–8 ). The posterior sulcal plate (Sp) has a small pore and the two anterior ends are projected ( Figure 8 View Figures 2–8 ).

Measurements: 30–43 µm length (L), 33–43 µm width (W) (Table 1).

Toxicity: this is a species that produces saxitoxins at very low concentrations, so they do not represent a risk of poisoning ( Kim et al. 2023).

Distribution: in the southern part of the Gulf of California.

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