Nannotax3 - ntax_Farinacci - Chrysochromulina chiton minuta Nannotax3 - ntax_Farinacci - Chrysochromulina chiton minuta

CATALOG - Chrysochromulina chiton minuta


Folder trail: ntax_Farinacci -> Haptophytes -> Chrysochromulina -> Chrysochromulina chiton minuta
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, C. ericina, C. fragaria, C. fragilis, C. herdlensis, C. hirta, C. inornamenta, C. kappa, C. lanceolata, C. latilepis, C. laurentiana> >>

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:

Compiled data

Citation: Chrysochromulina var. chiton var. minuta Gao et al. 1993
Taxonomic rank: variety
Type specimens: (Plate I, A-E; Fig. 2, a-d)
Type sample (& lithostrat): culture No. 84003 deposited at the Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, China.
Standardised type level: 160_HOLOCENE
Type locality: Type specimen isolated on November 3, 1984, from in situ surface seawater (17.7°C , 31.78 salinity) at Station No. 2, Jiaozhou Bay
Farinacci catalog page (& compiler): n/a


Original Description

Cells spheroidal to spherical or irregularly spherical, 4-6 µm in diameter. Its anterior end slightly depressed centrally, two flagella and one haptonnea arise from there. Flagella equal or subequal length (13-15 µm in length), isodynamic. The haptonema, thinner and softer than the flagella, and terminated bluntly rounded, coiled as many spherial circules when it is in motion, and about 11.3-13.8 µm in length when fully extended.

Chromatophores two, saucer-shaped at the lateral-anterial side of the cell body. A pyrenoid in the middle part or near the end of the chromatophore. Lucosin smaller at the body end opposite to the flagella. Cells swim relatively smoothly to the opposite direaion of the flagella. Nutrition autotrophic and/or phagotrophic.

Two kinds of scales on cell, the large ones like oval to round saucers, 0.73x0.5 - 0.82x0.6 µm in diameter , one side with tetraradiate sculptures; other side smooth, its margin broad (ca. 0.028-0.035 µm), without sculpture. The small scales, round to oval shaped, 0.38x0.31 - 0.43x0.36 µm in diameter, with same sculptures as that on the large scales, its margin about 0.03 µm wide.

Size:
Cell 4-6 µm

Extra details from original publication
The shape and sculptures on the scales of this new variety are similar to those on the Chrysochromulina chiton Parke et Manton (1958), but the size of the scales of the former is only about 1/25th that of the latter, and the flagella and haptonema are also smaller. Although the size and shape of the cells of this variety often vary, about 75% of the total cultured cells are 4 - 6 µm in diameter. The nutrition and movements of the new variety are similar to those of C. chiton. Based on these stable characteristics mentioned, a new variety Chrysochromulina chiton var. minuta was established by us. Reproduction by bifusion of cells was observed in cultures of this variety, but the amoeba-stage like that of the C. chiton Parke et Manton (1958) was not observed.

Manton (1967) reported Chrysochromulina chiton var., which appeared different in scale formation from C. chiton, and established it as a synonymous specimen of C. chiton; the sizes of its scales were between C. chiton Parke et Manton and this new variety C. chiton var. minuta, and the morphology of the former was somewhat similar to the latter (this new variety).

References:

Gao, Y., Tseng, C. K. & Guo, Y. (1993). Some new species of nannoplankton in Jiaozhou Bay, Shandong, China. Chinese Journal of Oceanology and Limnology. 11: 108-114. gs

Manton, I. (1967). Further observations on scale formation in Chrysochromulina chiton. Journal of Cell Science. 2: 411-418. gs

Parke, M., Manton, I. & Clarke, B. (1958). Studies on marine flagellates. IV. Morphology and microanatomy of a new species of Chrysochromulina. Journal of the Marine Biological Association of the United Kingdom. 37: 209-228. gs


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

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