Gaarderia A.Klejine, 1993

Holotype species: Gaarderia corolla (Lecal-Schlauder) Kleijne

Currently accepted name for the type species: Syracosphaera corolla Lecal-Schlauder

Original publication and holotype designation: Kleijne, A.. (1993). Morphology, taxonomy and distribution of extant Coccolithophorids (Calcareous nannoplankton). Published Ph.D. thesis. pp. 1-320. Amsterdam: Vrije Universiteit.

Description: Ovoid to pebble-shaped small-to-medium-sized cells (30-50 µm long) with a rigid cell wall composed of thecal plates. Apparently with two flagella (so far not reported) as in other dinoflagellates, but no distinct transverse furrow (as in other Podolampaceae). Girdle plates like normal plates of the episome and hyposome. Sulcus restricted to the hypocone, characterized by sulcal lists. Plate formula: Po, Pt, X, 3',1a,5",3c, 4s,5"', 1"". Canal plate X with long well-developed ridge. Plate 1"" with a characteristic zone of honey-combed like pores, located on the right side of the plate. Described so far only from fixed material; no information on cell content (chloroplasts ?), life cycle, or type of cell division known. Habitat : Marine plankton of the tropical or subtropical Pacific and Atlantic Ocean, only in water depths of 150 to 200m.

Information kindly contributed by M. Elbrächter but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of Syracosphaera.

Gender: This genus name is currently treated as feminine.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 December 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 04 March 2024

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