Ostreopsis Schmidt and Coolia Meunier (Dinophyceae, Gonyaulacales) from Cook Islands and Niue (South Pacific Ocean), including description of Ostreopsis tairoto sp. nov.

Author:

Verma A.,Hoppenrath M.,Smith K. F.,Murray J. S.,Harwood D. T.,Hosking J. M.,Rongo T.,Rhodes L. L.,Murray S. A.

Abstract

AbstractIt is important to decipher the diversity and distribution of benthic dinoflagellates, as there are many morphologically indistinct taxa that differ from one another in production of potent toxins. To date, the genusOstreopsiscomprises twelve described species, of which seven are potentially toxic and produce compounds presenting a threat to human and environmental health. In this study, isolates previously identified as “Ostreopsissp. 3” were sampled from the area where it was first reported, Rarotonga, Cook Islands, and have been taxonomically and phylogenetically characterised asOstreopsis tairotosp. nov. Phylogenetically, the species is closely related to “Ostreopsissp. 8”,O. mascarenensis, “O. sp. 4”,O. fattorussoi, O. rhodesiaeandO. cf.siamensis. Previously, it was considered a part of theO. cf.ovatacomplex but can be distinguished fromO. cf.ovatabased on the small pores identified on this study, and fromO. fattorussoiandO. rhodesiaebased on relative lengths of the 2′ plates. No known palytoxin -like compounds were detected in strains investigated in this study. Strains ofO. lenticularis, Coolia malayensisandC. tropicaliswere also identified and described. This study advances our knowledge of biogeography, distribution, and toxins ofOstreopsisandCooliaspecies.

Funder

Australian Research Council

Fisheries Research and Development Corporation

Senckenberg Biodiversität und Klima Forschungszentrum

New Zealand Ministry of Business, Innovation and Employment

Department of Foreign Affairs and Trade, Australian Government

Hanse Wissenschaftskolleg, Germany

Publisher

Springer Science and Business Media LLC

Subject

Multidisciplinary

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