Nannotax3 - ntax_Farinacci - Chrysochromulina andersonii Nannotax3 - ntax_Farinacci - Chrysochromulina andersonii

CATALOG - Chrysochromulina andersonii


Folder trail: ntax_Farinacci -> Haptophytes -> Chrysochromulina -> Chrysochromulina andersonii
Folders this level: C. acantha, C. adriatica, C. ahrengotii, C. alifera, C. andersonii, C. apheles, 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> >>

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: Chrysochromulina andersonii Yuasa et al. 2019

Compiled data

Citation: Chrysochromulina andersonii Yuasa et al. 2019
Taxonomic rank: species
Type specimens: Strain NIES 4257.
Type sample (& lithostrat): Cells embedded in resin block are deposited at the Department of Botany, National Museum of Nature and Science, Japan, as MPC- 42135. The culture on which the holotype is based has been deposited at the National Institute for Environmental Studies, Japan, as NIES-4257.
Type age (chronostrat): Extant
Standardised type level: 160_HOLOCENE
Type locality: Site 990528 (26°37′N, 127°47′E), East China Sea, off the northwest coast of Okinawa Island, Japan, collected on 31 March 2009.
Type repository: Tokyo, Department of Botany, National Museum of Nature and Science, Japan,
Repository Country: Japan
Current citation: Chrysochromulina andersonii Yuasa et al. 2019


Original Description

Haptophyte, marine, photosynthetic, and symbiotic with polycystine radiolarians and foraminiferans. In host, cells spherical and nonmotile. In culture, the haptophyte produces motile cells. Free-living motile cells saddle-shaped, approximately 3–5 μm long and 3–4 μm wide, with appendages inserted apically in a slight depression. Two equal to subequal flagella, 6–12 μm long. One coiling haptonema, 6–16 μm long, slightly longer than the two flagella. Flagella and haptonema originated from the concave, ventral side of the cell, in the apical to median region. Cells covered by two types of scales arranged in two layers. Inner layer was composed of oval to round scales, 0.19–0.26 μm in diameter, and the outer layer composed of oval to round scales, 0.25–0.45 μm in diameter, with upright rims (37–55 nm high). Both scale faces had a faint cross in centre and radiating ridges extended from the faint cross to the periphery. Two golden-brown parietal chloroplasts contained three thylakoid lamellae and immersed pyrenoids. Nucleus on dorsal side of cell in median to posterior region. Golgi body positioned in front of nucleus.

Size:
Cells 3–5 μm long and 3–4 μm wide; flagella, 6–12 μm long; haptonema, 6–16 μm long, Inner layer oval to round scales, 0.19–0.26 μm in diameter; outer layer oval to round scales, 0.25–0.45 μm in diameter, with upright rims (37–55 nm high).

Etymology:
The specific epithet, andersonii, is named after O. Roger Anderson, the first researcher to observe and identify the haptophyte symbiont within polycystine radiolarians.

Extra details from original publication
The solitary polycystine radiolarian Dictyocoryne truncatum is shown in Fig. 1. It had a triangular and flattened shell with rounded apices and maximum shell length of approximately 200–300 μm in the adult stage. The surface of the shell was a spongy meshwork without ornamentation. Cytoplasm was generally brownish-red with radiating ray-like pseudopodia and web-like rhizopodia. In the symbiotic state, C. andersonii was visible as yellow-brown coccoid cells with diameters ranging between 2 and 4 μm (Figs 1, 2, arrows). They occurred in the host radiolarian cytoplasm and were ordinarily carried to the outside of the shell by rhizopodial streaming of their host. During the day, the symbionts were dispersed into the surrounding environment along with the pseudopodia and rhizopodia; in some cases, more than 100 cells were observed using light microscopy (Fig. 1).

References:

Yuasa, T., Kawachi, M., Horiguchi, T. & Takahashi,O (2019). Chrysochromulina andersonii sp. nov. (Prymnesiophyceae), a new flagellate haptophyte symbiotic with radiolarians. Phycologia. 58(2): 211-224. gs


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Chrysochromulina andersonii: Catalog entry compiled by <% compiler %>. Viewed: 17-2-2025

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