THE RECLASSIFICATION OF PFIESTERIA SHUMWAYAE (DINOPHYCEAE): PSEUDOPFIESTERIA, GEN. NOV

Pfiesteria shumwayae Glasgow et Burkholder is assigned to a new genus Pseudopfiesteria gen. nov. Plate tabulation differences between Pfiesteria and Pseudopfiesteria gen. nov. as well as a maximum likelihood phylogenetic analysis based on rDNA sequence data warrant creation of this new genus. The Ko...

Full description

Saved in:
Bibliographic Details
Published in:Journal of phycology 2005-06, Vol.41 (3), p.643-651
Main Authors: Wayne Litaker, R., Steidinger, Karen A., Mason, Patrice L., Landsberg, Jan H., Shields, Jeffrey D., Reece, Kimberly S., Haas, Leonard W., Vogelbein, Wolfgang K., Vandersea, Mark W., Kibler, Steven R., Tester, Patricia A.
Format: Article
Language:English
Subjects:
Brackish
evolution
Marine
Pfiesteria shumwayae
Pfiesteria-like dinoflagellates
Pseudopfiesteria
ribosomal genes
taxonomy
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pfiesteria shumwayae Glasgow et Burkholder is assigned to a new genus Pseudopfiesteria gen. nov. Plate tabulation differences between Pfiesteria and Pseudopfiesteria gen. nov. as well as a maximum likelihood phylogenetic analysis based on rDNA sequence data warrant creation of this new genus. The Kofoidian thecal plate formula for the new genus is Po, cp, X, 4', 1a, 6'', 6c, PC, 5+s, 5''', 0p, 2'''. In addition to having six precingular plates, P. shumwayae comb. nov. also has a distinctive diamond or rectangular-shaped anterior intercalary plate. Both Pfiesteria and Pseudopfiesteria gen. nov. are reassigned to the order Peridiniales based on an apical pore complex (APC) with a canal (X) plate that contacts a symmetrical 1', four to five sulcal plates, and the conservative hypothecal tabulation of 5''', 0p, and 2'''. These morphological characters and the life histories of Pfiesteria and Pseudopfiesteria are consistent with placement of both genera in the Peridiniales. Based on the plate tabulations for P. shumwayae, P. piscicida, and the closely related 'cryptoperidiniopsoid' and 'lucy' groups, the family Pfiesteriaceae is amended to include species with the following tabulation: 4-5', 0-2a, 5-6'', 6c, PC, 5+s, 5''', 0p, and 2''' as well as an APC containing a pore plate (Po), a closing plate (cp), and an X plate; the tabulation is expanded to increase the number of sulcal plates and to include a new plate, the peduncle cover (PC) plate. Members of the family have typical dinoflagellate life cycles characterized by a biflagellated free-living motile stage, a varying number of cyst stages, and the absence of multiple amoeboid stages.
ISSN:0022-3646
1529-8817
DOI:10.1111/j.1529-8817.2005.00075.x