Alexandrium pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo

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 : 545-547

publication ID

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

DOI

https://doi.org/10.5281/zenodo.11094889

persistent identifier

https://treatment.plazi.org/id/03E50944-FFB1-2A10-4D24-E73EFDF2FFC0

treatment provided by

Felipe

scientific name

Alexandrium pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo
status

 

3.1.8 Alexandrium pseudogonyaulax (Biecheler) Horiguchi ex Yuki et Fukuyo ( Figures 38–43 View Figures 38–43 )

References: Balech 1995, 73, pl. XVI, figs 1–18; Nguyen and Larsen 2004, 102, pl. 13, figs 1–3; Gu et al. 2013, 75, figs 4 A–D; Lassus et al. 2016, 53, pl. 9 A–D; Hernández-Becerril et al. 2021, 70, 71.

Solitary cells of medium to relatively large size, ovoid to pentagonal and slightly depressed longitudinally ( Figure 38 View Figures 38–43 ), epitheca slightly domed and shorter than hypotheca ( Figures 38 and 39 View Figures 38–43 ), which has an antapical concavity, cingulum wide and excavated ( Figure 41 View Figures 38–43 ), and sulcus wide and deep ( Figures 38 and 39 View Figures 38–43 ). First apical plate (1′) is not connected to Po ( Figure 39 View Figures 38–43 ) and has a pentagonal shape ( Figures 39, 41 View Figures 38–43 , and 42) and a strong posterior indentation (notch). A large ventral pore appears between this plate and 4′ ( Figures 39, 41–43 View Figures 38–43 ), whereas 6″ is quadrangular. Po is elongate with a classical comma shape ( Figure 40 View Figures 38–43 ).

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

Toxicity: this species produces goniodomins A and B ( Krock et al. 2018).

Distribution: in the Gulf of Tehuantepec.

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