Champia Desvaux, 1809
Holotype species: Champia lumbricalis (Linnaeus) Desvaux
Original publication and holotype designation: Desvaux, N.A. (1809). Observations sur le genre Fluggea, Rich. (Slateria, Desv.). Journal de Botanique (Desvaux) 1(4): 243-246.
Request PDFPrecise date of publication: Jan 1809
Description: Thallus with a discoid holdfast and erect or prostrate fronds; erect fronds often iridescent, filled with a watery mucilage throughout, terete or compressed, slightly constricted into regular segments by septa, branching usually alternate, sometimes irregular, opposite or whorled, non-deciduous; structure multiaxial, cortex with an inner layer of large cells covered by an incomplete layer of small cells; medulla consisting of the septa at each constriction and a number of regularly arranged, discrete longitudinal filaments lining the cortex, bearing inwardly-directed secretory cells and uniting with the septa. Gametangial plants dioecious; spermatangial sori superficial, spermatangia subterminal on elongate mother cells formed from cortical cells; procarpic, carpogonial branches in cortex, 4-celled, each with a single 2-celled auxiliary cell branch, gonimoblast developing outwards from a fusion cell, only terminal cells forming carposporangia, enclosed within distended cortical pericarp, tela arachnoidea well developed, cystocarps scattered, external, with a well-defined pore; tetrasporangia intercalary in cortical filaments, irregularly scattered in younger parts of the thallus, spores tetrahedrally arranged; polysporangia unknown.
Information contributed by: M.D. Guiry. The most recent alteration to this page was made on 2018-09-27 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: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera,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=117
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 27 September 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024
