Alexandrium tamiyavanichii 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

publication ID

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

DOI

https://doi.org/10.5281/zenodo.11000332

persistent identifier

https://treatment.plazi.org/id/03E50944-FFBE-2A11-4E98-E389FBA4FF85

treatment provided by

Felipe

scientific name

Alexandrium tamiyavanichii Balech
status

 

3.1.10 Alexandrium tamiyavanichii Balech ( Figures 53–66 View Figures 53–66 )

References: Balech 1994, 217, figs 1–6; Balech 1995, 57, pl. XIII, figs 1–19; Usup et al. 2002, 271, figs 6 A–H; Nguyen and Larsen 2004, 106, pl. 15, figs 1–5; Lim et al. 2007, 15, figs 2 A–J; Menezes et al. 2018, 5, figs 2 G–K; Hernández-Becerril et al. 2021, 72, 73.

This species forms medium to large chains with more than 64 cells ( Figure 53 View Figures 53–66 ). Cells are nearly spherical ( Figure 53 View Figures 53–66 ), with non-pronounced shoulders ( Figure 54 View Figures 53–66 ), epitheca and hypotheca about the same proportion ( Figure 55 View Figures 53–66 ), wide and excavated cingulum ( Figures 56 and 59 View Figures 53–66 ), and not prominent apical pore ( Figures 62 and 63 View Figures 53–66 ). Reduced cingular lists and more developed sulcal lists, with their margins reaching until the antapical end, resembling short spines ( Figure 59 View Figures 53–66 ). Plate 1′ is in connection with Po, and is widely rhomboid, with a ventral pore ( Figure 58 View Figures 53–66 ). Po is large, comma-shaped, with a large connecting pore ( Figures 62 and 63 View Figures 53–66 ). The anterior sulcal plate (Sa) is composed by two parts, the most anterior is trapezoid and the posterior similar to others of the genus ( Figures 55, 57, 65 View Figures 53–66 , and 66), with a conspicuous notch, whereas the posterior sulcal plate (Sp) is irregularly hexagonal and has a large attachment pore with a fine furrow running from its right margin ( Figures 60, 61 View Figures 53–66 , and 64).

Measurements: 35–42 μm L, 40–45 μm W (Table 1).

Toxicity: this species produces toxins associated to PSP ( Xu et al. 2021).

Distribution: in the southern Gulf of California and the central Mexican Pacific.

PSP

Parasitic Seed Plants

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