Fragilidium Balech, 1965

Holotype species: Fragilidium heterolobum Balech

Original publication and holotype designation: Balech, E. (1959). Two new genera of dinoflagellates from California. Biological Bulletin 116(2): 195-203, 3 figures.

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Description: Medium-sized (ca. 50 µm) biflagellated thecate dinoflagellates with thin thecal plates. The cingulum is median and circular, the sulcus is restricted to the hypocone. Plate formula: Po, 4', 8", 9-10c, 7s, 7'", 2"", 1P. The pore plate is irregularly rhomboidal with a characteristic comma-shaped pore. The nucleus is horseshoe-shaped, numerous chloroplasts are present. Cell division in special division cysts, so far only 2 daughter cells observed. In addition, thick-walled spherical resting cysts are known. Although all species are reported to have chloroplasts, some of them apparently are feeding phagotrophic on other dinoflagellates and diatoms. Marine plankton apparently restricted to coastal waters.

Information contributed by: M. Elbrächter. The most recent alteration to this page was made on 2021-11-11 by E.A. Molinari Novoa.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Tillmann, U., Bantle, A., Krock, B., Elbrächter, M & Gottschling, M. (2021). Recommendations for epitypification of dinophytes exemplified by Lingulodinium polyedra and molecular phylogenetics of the Gonyaulacales based on curated rRNA sequence data. Harmful Algae 103: [1-16], 8 figs, 3 tables.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=44643

Citing AlgaeBase
Cite this record as:
E.A. Molinari Novoa in Guiry, M.D. & Guiry, G.M. 11 November 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024