Chalkopyxis Pascher, 1931
Holotype species: Chalkopyxis tetrasporoides Pascher
Publication details: Pascher, 1931: 102
Original publication and holotype designation: Pascher, A. (1931). Über eigenartige zweischalige Dauerstadien bei zwei tetrasporalen Chrysophyceen (Chrysocapsalen). Archiv für Protistenkunde 73: 73-103.
Request PDFDescription: Cells ellipsoidal, arranged in groups of 4, assembled in gelatinous colonies, which initially are fixed, later free-floating. Outer layer of the colony jelly radially striated. Cell naked, with a large brown parietal chloroplast without stigma, and with contractile vacuoles. Reproduction by division, some cells develop into pseudocysts with thick brown envelopes. On germination, when up to 16 daughter cells are formed, the envelope breaks open in 2 almost equal parts, and new colonies are formed with the envelope remnants persisting in the jelly. Sexual reproduction and stomatocysts not observed. Found in ponds, epiphytic on filamentous algae in Czechoslovakia.
Information contributed by: J. Kristiansen. The most recent alteration to this page was made on 2021-10-19 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 feminine.
Most recent taxonomic treatment adopted: Ugadim, Y. & Pereira, S.M.B. (1978). Deep-water marine algae from Brazil collected by the Recife Comission, 1: Chlorophyta. Ciênc. Cult., S Paulo 30(7): 839-842.
Comments: Kristiansen & Preisig (2001: 9) record this genus as alternately being a member of the Family Chrysosaccaceae Bourr. 1957.
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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=44487
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 19 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 05 June 2025
