Pannus Hickel, 1991

Holotype species: Pannus spumosus B.Hickel

Original publication and holotype designation: Hickel, B. (1991). Two new chroococcal cyanophytes from a brackish environment (Schlei-Fjord), Germany. Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 64: 97-104.

Description: Unicellular-colonial; colonies free-floating or mixed with other algae and among aquatic plants, microscopic, flattened, irregular in outline, clathrate and waved, composed of subcolonies, with cells situated irregularly in one plane, in a layer of 1-3; young colonies more or less spherical, old colonies irregular, many-celled. Colonial mucilage fine, homogeneous, colorless, diffluent. Cells spherical or slightly elongated (before division), after division hemispherical, pale blue-green, with or without gas vesicles, sometimes surrounded with special fine, diffluent mucilaginous envelopes. Cell division in two directions perpendicular to the surface of the colony. Reproduction by the dissociation of colonies. Free-floating (planktonic) in lakes, small reservoirs, sometimes in slightly saline water. One species originally attached to filamentous algae or submersed plants.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-03 by M.D. Guiry.

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

Gender: This genus name is currently treated as masculine.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=44876

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 19 April 2024