Nannotax3 - ntax_Farinacci - Chrysochromulina fragaria Nannotax3 - ntax_Farinacci - Chrysochromulina fragaria

CATALOG - Chrysochromulina fragaria


Folder trail: ntax_Farinacci -> Haptophytes -> Chrysochromulina -> Chrysochromulina fragaria
Folders this level: << < C. bergenensis, C. birgeri, C. brachycylindra, C. brevifilum, C. breviturrita, C. camella, C. campanulifera, C. chiton, C. chiton minuta, C. cyathophora, C. cymbium, C. discophora, C. elegans, C. ephippium, C. ericina, C. fragaria, C. fragilis, C. herdlensis, C. hirta, C. inornamenta, C. kappa, C. lanceolata, C. latilepis, C. laurentiana, C. leadbeateri, C. limonia, C. mactra, C. mantoniae, C. megacylindra, C. microcylindra, C. minor> >>

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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Current identification/main database link: Haptolina fragaria (Eikrem and Edvardsen 1999) Edvardsen & Eikrem, in Edvardsen et al., 2011

Compiled data

Citation: Chrysochromulina fragaria Eikrem & Edvardsen, 1999
Taxonomic rank: species
Standardised type level: 160_HOLOCENE
Type locality: From a bloom dominated by species of Chrysochromulina off the southern coast of Norway in May-June 1994. Strain S19 originated from a surface water sample collected on 20 May 1994 off Flodevigen (58°25'N, 8°46'E), and strain U21 was from a surface water sample collected on 2 June 1994 off Grimstad (58°20'N, 8°36'E).
Farinacci catalog page (& compiler): n/a
Current citation: Haptolina fragaria (Eikrem and Edvardsen 1999) Edvardsen & Eikrem, in Edvardsen et al., 2011


Original Description

Cells spherical to subspherical measuring 4-8 µm, append­ ages inserted apically in a slight depression. Haptonema (3-9 µm) shorter than the usually equal flagella (10-16 /-Lm). Peri­ plast covered with scales of two types. Scales with inflexed rims (50-100 nm) oval to round 0.35-0.75 by 0.45-0.8 µm and scales with erect rims (150-200 nm) round to oval 0.5-0.8 by 0.5-0.8 µm. Proximal and distal faces of both scale types with radiating ribs arranged in four quadrants.

Etymology:
Latin fragaria (strawberry). The organism gives the impression of the shape of a squat strawberry in the light microscope.

Extra details from original publication
Microscopic observations of Chrysochromulina fragaria sp. nov. strain 819. The spherical to subspherical cells (4-8 µm) bear a hapto­nema (3-8 µm) that is shorter than the two equal or subequal flagella (10-14 µm) and is capable of coiling. The appendages are inserted in a slight apical depression (Figs 1,2). Two types of scales cover the periplast. We have not been able to produce sections of cells with intact scale investments, but we assume that the scales are arranged in two layers, with the scales hav­ ing the tall, erect rims forming the outer layer. We also assume that the rims are on the distal face of the scales, which is usually the case in Chrysochromulina species (Leadbeater 1994). The inner layer consists of round to oval plate scales (0.35-0.75 by 0.45-0.8 µm) with an inflexed rim (50-100 nm) with concentric fibers. Both scale faces have radiating ribs (c. 65-90) extending from center to edge (proximal face) or rim (distal face). The round scales of the outer layer (0.5-0.8 by 0.5-0.8 fLm) have tall erect rims (150-200 nm) with no obvious pattern, and the radiating ribs (c. 75-90) extend from the center to the rim on the distal face and from center to edge on the proximal face (Figs 3-7). The pattern created by the radiating ribs divides the scales into four distinct quad­rants (Fig. 7) in both scale types. The cells contain two golden-brown, parietal chloroplasts, each with an immersed pyrenoid that may be bulging and may be traversed by thylakoids, a posterior nucleus, a mitochon­ drion, and a Golgi body where the scales are produced (Figs 8-11).

The flagellar apparatus (Fig. 15) has not been studied in detail, but some features have been revealed. The flagella have a proximal band consisting of a tripartite plate and a distal band with a transitional plate (Figs 12-14). The extended part of the haptonema contains seven microtubules (Fig. 16).

To allow a comparison between the scales of C. fragaria sp. nov. and those of Chrysochromulina sp. CCMP 1204, we have included electron micrographs (Figs 17, 18) of a whole cell and detached scales. Under the light microscope the cells appear spherical to pear shaped (8-14 by 6-10 fLm). The cells may be strongly compressed dorsoventrally. The haptonema (12-20 µm) is slightly shorter than the flagella (14-24 µm). The scales are of two types: one type has an erect rim (85-100 nm) and measures 0.7-0.9 by 0.8-1.0 µm; the rim of the other type appears inflexed (35-50 nm) and it measures 0.5-0.8 by 0.6-0.9 µm. All scale faces have radiating ribs (c. 75- 85).

References:

Eikrem, W. & Edvardsen, B. (1999). Chrysochromulina fragaria sp. nov. (Prymnesiophyceae), a new haptophyte flagellate from Norwegian waters. Phycologia. 38: 149-155. gs


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Chrysochromulina fragaria: Catalog entry compiled by Jeremy Young. Viewed: 17-2-2025

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