Should Gonyaulax hyalina and Gonyaulax fragilis (Dinophyceae) remain two different taxa?

Type Article
Date 2019
Language English
Author(s) Carbonell-Moore M. Consuelo1, Mertens KennethORCID2
Affiliation(s) 1 : Department of Botany and Plant Pathology, College of Agricultural Sciences, Oregon State University, Corvallis, Oregon 97331-2902, USA
2 : Ifremer, LER BO, Station de Biologie Marine, Place de la Croix, BP 40537, Concarneau Cedex F-29185, France
Source Phycologia (0031-8884) (Informa UK Limited), 2019 , Vol. 58 , N. 6 , P. 685-689
DOI 10.1080/00318884.2019.1663477
WOS© Times Cited 8
Keyword(s) Anterior sulcal plate, Gonyaulax polygramma, Misidentification

Escalera et al. (2018. Phycologia 57: 453–464) concluded that Gonyaulax hyalina and G. fragilis were the same species. Here, the morphologies of G. hyalina and G. fragilis were restudied in field samples from different parts of the World Ocean. Results showed that Escalera et al. did not observe G. fragilis, as all strains used in their study belong to one species, G. hyalina. In consequence, it is hereby proposed that the two taxa remain as separate species until further genetic studies are carried out. Additionally, the interpretation of the anterior sulcal plate as unique within gonyaulacoids is considered here inaccurate, as the plate pattern of both species is similar to other species of Gonyaulax, e.g. G. polygramma. We also show that both species may co-occur in the same sample. Their observation of an anterior intercalary plate in cultures of G. hyalina was confirmed in field samples.

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