Molecular Phylogeny of the Marine Planktonic Dinoflagellate Oxytoxum and Corythodinium (Peridiniales, Dinophyceae)

Fernando Gómez,

Kevin C. WAKEMAN,

Aika YAMAGUCHI,

Hisayoshi NOZAKI

Abstrakt

The dinoflagellate generaOxytoxum and Corythodinium that account for more than fifty species are widespread in warm oceans. These genera have been considered synonyms and thecal plate designations varied among authors. Several planktonic and sand-dwelling genera have been placed within the Oxytoxaceae. We obtained the first molecular data based on small subunit (SSU) rRNA gene sequences ofOxytoxum and Corythodinium, including the type species (O. scolopax and C. tessellatum) and C. frenguellii and C. cristatum. The three species of Corythodinium branched together a strong support [bootstrap (BP) of 98%]. This formed a sister clade with moderate support (BP 75%) with O. scolopax that supported the generic split. Oxytoxaceae should exclusively remain for Oxytoxum and Corythodinium, as an independent group, unrelated to any other known dinoflagellate. Oxytoxum was characterized by spindle-shaped cells with an anterior narrow epitheca, an apical spine and little cingular displacement. Corythodinium exhibits relatively broad cell shapes, with wider epitheca and greater cingular displacement, and an obovate or pentangular anterior sulcal plate that noticeably indented the epitheca. This suggested the need of new combinations for species that were described as Oxytoxum and possessed the characteristics of Corythodinium.

Słowa kluczowe: 18S ribosomal RNA, armored Dinophyta, Atlantic Ocean, Mediterranean Sea, phytoplankton, SSU rDNA phylogeny, taxonomy, thecate Dinoflagellata
References

Balech E. (1954) Sur la tabulation de Podolampas et OxytoxumRapp. Commun. 8e Congr. Int. Bot., sect. 17: 114–116

Balech E. (1971a) Microplancton de la campaña oceanográfica Productividad III. Rev. Mus. Argent. Cienc. Nat. ‘B. Rivadavia’, Hidrobiol. 3: 1–202

Balech E. (1971b) Microplancton del Atlántico Ecuatorial Oeste (Equalant I). Serv. Hidrogr. Naval, Buenos Aires H654: 1103

Balech E. (1988) Los dinoflagelados del Atlántico Sudoccidental. Pub. Espec. Inst. Español Oceanogr1: 1–310

Burns D. A., Mitchell J. S. (1982) Some coastal marine dinoflagellates from around New Zealand. New ZealJ. Mar. Res. Freshwat. Res. 16: 69–79

Carbonell-Moore M. C. (1994) On the taxonomy of the family Podolampadaceae Lindemann (Dinophyceae) with descriptions of three new genera. Rev. Palaeobot. Palynol84: 73–99

Chrétiennot-Dinet M.-J., Sournia A., Ricard M., Billard C. (1993) A classification of the marine phytoplankton of the world from class to genus. Phycologia 32: 159–179

Dodge J. D. (1984) Dinoflagellate Taxonomy. In: Dinoflagellates, (Ed. D. L. Spector). Academic Press, Orlando, Florida, 17–42

Dodge J. D., Saunders R. D. (1985) A partial revision of the genus Oxytoxum (Dinophyceae) with the aid of scanning electron microscopy. Bot. Mar28: 99–122

Edgar R. C. (2004) MUSCLE: a multiple sequence alignment method with reduced time and space complexity. BMC Bioinformatics 5: 113

Fensome R. A., Taylor F. J. R., Norris G., Sarjeant W. A. S., Wharton D. I., Williams G. L. (1993) A Classification of Living and Fossil Dinoflagellates. Am. Mus. Nat. Hist. Micropaleontology special publication number 7. Sheridan Press, Hanover, Pennsylvania

Gaarder K. R. (1954) Dinoflagellates from the ‘Michael Sars’ North Atlantic Deep-Sea Expedition 1910. Rept. Scient. Results ‘Michael Sars’ N. Atlant. Deep-Sea Exped. 1910, 2: 1–62

Gómez F., Claustre H., Souissi S. (2008) Rarely reported dinoflagellates of the genera Ceratium, Gloeodinium, Histioneis, Oxytoxum and Prorocentrum (Dinophyceae) from the open southeast Pacific Ocean. Rev. Biol. Mar. Oceanogr. 43: 25–40

Gómez F., Moreira D., López-García P. (2010a) Molecular phylogeny of the dinoflagellates Podolampas and Blepharocysta (Peridiniales, Dinophyceae). Phycologia 49: 212–220

Gómez F., Moreira D., López-García P. (2010b) Neoceratium gen. nov., a new genus for all marine species currently assigned to Ceratium (Dinophyceae). Protist 161: 35–54

Gómez F., Qiu D., Dodge J. D., Lopes R. M., Lin S. (2016) Morphological and molecular characterization of Ptychodiscus noctiluca revealed the polyphyletic nature of the order Ptychodiscales (Dinophyceae). J. Phycol. 52: 793–805

Kofoid C. A. (1907) Reports of the scientific results of the expedition to eastern tropical Pacific. IX. New species of dinoflagellates. Bull. Mus. Comp. Zool. Harvard Coll50: 162–207

Kofoid C. A., Michener J. R. (1911) New genera and species of dinoflagellates. Bull. Mus. Comp. Zool. Harvard Coll54: 267–302

Loeblich A. R. Jr., Loeblich III A. R. (1966) Index to the genera, subgenera, and the sections of the Pyrrhophyta. Stud. Trop. Oceanogr. Miami 3: 1–94

Loeblich A. R. III (1982) Dinophyceae. In: Synopsis and Classification of Living Organisms. Vol. 1, (Ed. S. P. Parker). McGraw-Hill, New York, 101–115

Murray G., Whitting F. (1899) New Peridiniaceae from the Atlantic. Trans. Linn. Soc. London, 2nd ser., Bot. 5: 321–342

Rampi L. (1939) Su qualche Peridinea rara, nuova o curiosa nel fitoplancton del mare Ligure. Nuovo Giorn. Bot. Ital. n. ser46: 456–469

Rampi L. (1941) Ricerche sul fitoplancton del mare Ligure 3. Le Heterodiniacee e le Oxytoxacee delle acque di Sanremo. Ann. Mus. Civico Storia Nat. Genova 61: 50–69

Rampi L. (1951) Su alcune Peridinee nuove od interesanti raccolte nelle acque di San-remo. Atti Accademia Ligure Scienze e Lettere 8: 1–11

Schiller J. (1937) Dinoflagellatae (Peridineae) in monographischer Behandlung. In: Kryptogamen-Flora von Deutschland, Österreichs und der Schweiz. Vol. 2, (Ed. L. Rabenhorst). Akad. Verlag, Leipzig, 1–589

Sournia A. (1986) Atlas du Phytoplancton Marin. Vol. I: Introduction, Cyanophycées, Dictyochophycées, Dinophycées et Raphidophycées. CNRS, Paris

Steidinger K. A., Tangen K. (1997) Dinoflagellates. In: Identifying Marine Phytoplankton, (Ed. C. Tomas). Academic Press, San Diego, USA, 387–584

Stein F. (1883) Der Organisms der Infusionsthiere. III. Flagellaten II. W. Engelmann, Leipzig.

Taylor F. J. R. (1976) Dinoflagellates from the International Indian Ocean Expedition. Bibl. Bot. 132: 1–234

Taylor F. J. R. (1987) Taxonomy and classification. In: The Biology of Dinoflagellates, (Ed. F. J. R. Taylor). Botanical Monographs 21. Blackwell, Oxford, U.K., 723–731

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