Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Citation: Chrysochromulina laurentiana Kling 1981Taxonomic rank: speciesType specimens: Figs 5, 6, 7 from L226S, ELA, Ontario, Canada (93'30' to 94'00'W, 49'30' to 49'45").Type sample (& lithostrat): L226SType locality: Experimental Lakes Area (ELA), northwestern Ontario, Canada (49.5 to 49.75N;-93.5 to 94E).Farinacci catalog page (& compiler): n/a Current citation: Chrysochromulina laurentiana Kling 1981
Original Description Cell sphaeroidal to ovate, (8-10 µm) diameter or length. Two equal to subequal flagella, 15-22 µm long; haptonema 7-10 µm long. Cell body covered with a delicate layer of organic scales of one type: oval to-diamond shaped scales (0.3 µm wide; 0.5 µm long) with a sculptured pattern of parallel or criss-cross lines on a diagonal to the longitudinal axis plus a raised rim on the distal surface and no pattern on the proximal surface. Size: Cells sphaeroidal to ovate, 8-10 µm; scales oval 0.3 x 0.5 µm Etymology: The epithet "laurentiana" was chosen because of its boreal Canadian occurrence.
Extra details from original publication The two species (C. laurentiana and C. breviturrita) can form up to 54% of the total phytoplankton biomass and up to 60% of the chrysophyte biomass in natural ELA lakes (Findlay, pers. comm.). The greatest biomass was generally found in the metalimnion of the lakes. C. laurentiana has been found in the majority of natural lakes while to date C. breviturrita has been found only in the acidified lakes. The possibility exists that C. breviturrita may be an indicator of acidification processes. Editors' Notes Non-marine
References:
Kling, H. J. (1981). Chrysochromulina laurentiana: an electron microscopic study of a new species of Prymnesiophyceae from Canadian Shield lakes. Nordic Journal of Botany. 1: 551-555. gs
Chrysochromulina laurentiana: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025