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.
Taxa are sorted alphabetically for simple browsing, or you can use search boxes at the top & bottom of the page
Citation: Chrysochromulina breviturrita Nicholls 1978Taxonomic rank: speciesType specimens: DEposited in the Ontario Ministry of the Environment's phytoplankton sample repository (No. 77-2983) and National Herbarium of Canada (CANA) as No. 20447.Standardised type level: 160_HOLOCENEType locality: Holotype from Buckskin Lake, Ontario. Canada (78.11W; 45.95N). FRESHWATERFarinacci catalog page (& compiler): n/a Current citation: Chrysochromulina breviturrita Nicholls 1978
Original Description Cell sphaeroidal to ovate. (6)-8-12(-16) µm diam or long. Two equal or subequal flagella. (15-)18-24(-27) µm long; haptonema (6-)10-14(-16) µm long. Chromatophores usually 2. lobed and parietal. Single pyrenoid 1.5-2 µm diam, Iocated in the mid-region of the cell; stigma absent. Large contractile vacuole near bases of the haptonema and flagella at anterior pole. Food vacuole near posterior pole sometimes containing refractive material up to 3 µm diam. Nucleus located in the mid-region of the cell with conspicuous nucleolus 0.5-1 µm diam. Cell body covered with delicate organic scales of two types: an inner layer of oval plate stales (0.8-1.2 µm long; 0.5-0.6) µm wide) with a sculptured pattern of fine concentric lines and radiating ridges on the disial surface and a pattern of parallel ridges on the proximal surface; outer scales consisting of a base-plate similar in size to the underlying plate scales, but supporting centrally a short. delicate, blunt-ended spine with a club-shaped terminus. Spines attached to the base-plate by two to several branching arms arising from division of the spine about mid-way between the base-plate and the distal end of the spine. Total height of the spine above the base-plate, including supporting structures. 0.4-0.6 µm. Size: Cell 8-12 µm; inner oval plate stales (0.8- 1.2 µm long; 0.5-0.6) µm wide); outer scales similar but with blunt spine
References:
Nicholls, K. H. (1978). Chrysochromulina breviturrita sp. nov., a new freshwater member of the Prymnesiophyceae. Journal of Phycology. 14: 499-505. gs
Chrysochromulina breviturrita: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025