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Morphology and taxonomy of Dinophysis species of the section Hastata (Dinoflagellata), including the description of Dinophysis conjuncta sp. nov., from the Mexican marine waters

Published online by Cambridge University Press:  21 February 2013

Karina Esqueda-Lara ,
Dulce Parra-Toriz  and
David U. Hernández-Becerril
Karina Esqueda-Lara
Affiliation:
Posgrado de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado postal 70–305, México, D.F.04510 Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado postal 70–305, México, D.F. 04510 México
Dulce Parra-Toriz
Affiliation:
Posgrado de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apartado postal 70–305, México, D.F.04510 Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado postal 70–305, México, D.F. 04510 México
David U. Hernández-Becerril*
Affiliation:
Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado postal 70–305, México, D.F. 04510 México
*
Correspondence should be addressed to: D.U. Hernández-Becerril, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Apartado postal 70–305, México, D.F. 04510 México email: dhernand@cmarl.unam.mx
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Abstract

There have been recent attempts to improve our knowledge about dinoflagellates of the order Dinophysales either in Mexican marine waters or worldwide, and although new records and even new species have reliable illustrations and descriptions, this group is so diverse that it needs to be studied in more detail. This paper is the product of the analysis of net phytoplankton material collected from coasts of the tropical Mexican Pacific (Gulf of California, Central Mexican Pacific and Gulf of Tehuantepec), and the southern Gulf of Mexico. Material was studied using light microscopy and scanning electron microscopy (SEM). Eleven taxa (10 species and one variety) of the section Hastata were fully identified, with nine species studied for the first time by electron microscopy (only Dinophysis hastata and D. schuettii had been previously studied by SEM), and including seven new records for the Mexican Pacific (Dinophysis monacantha, D. nias, D. phalacromoides, D. pusilla, D. swezyae, D. uracantha var. mediterranea, and D. uracanthoides), and one new record for the Gulf of Mexico (Dinophysis uracanthoides). Two species remain as unidentified, as only one specimen of each was found. Additionally, we studied in detail the new species, Dinophysis conjuncta sp. nov., for which a full description is provided. Descriptions, measurements, illustrations and local distribution data are provided for each species.

Keywords

dinoflagellatesDinophysisMexican Pacific Oceanmorphologyphytoplanktonsouthern Gulf of Mexicotaxonomy
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 5 , August 2013 , pp. 1187 - 1202
Copyright
Copyright © Marine Biological Association of the United Kingdom 2013 

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