Nannotax3 - ntax_Farinacci - Chrysoculter

CATALOG - Chrysoculter

Folder trail: ntax_Farinacci -> Haptophytes -> Chrysoculter
Folders this level: Chrysocampanula, Chrysocapsa, Chrysochromulina, Chrysochromulinaceae, Chrysoculter, Corcontochrysis, Corymbellus, Diacronema, Dicrateria, Exanthemachrysis, Haptolina, Hyalolithus, Imantonia, Isochrysis, Monochrysis, Pavlomulina, Pavlomulinales, Pavlova, Pavlovaceae, Pavlovales> >>

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

Chrysoculter rhomboideus Nakayama, Yoshida, Noël, Kawachi & Inouye 2005
= Chrysoculter rhomboideus

Current identification/main database link: Chrysoculter Nakayama, Yoshida, Noel, Kawachi & Inouye in Nakayama et al. 2005

Compiled data

Citation: Chrysoculter Nakayama, et al. 2005
Rank: Genus
Farinacci catalog page (& compiler): n/a
Current citation: Chrysoculter Nakayama, Yoshida, Noel, Kawachi & Inouye in Nakayama et al. 2005

Original Description

Cells solitary, mostly asymmetric knife-shaped, 10–16 μm long, 3–6 μm wide. Two equal to subequal flagella, 14–26 μm, inserted at the cell apex. Haptonema 4–10 μm, noncoiling. Cells covered by two types of scales. Scales of the inner layer elliptical, 0.35 × 0.18 μm, with a narrow inflexed rim, and a radial pattern. Scales of the outer layer rhomboidal, 1.1 × 0.6 μm, with upright rim (50–80 nm), two projections, and a radial pattern. Rhomboidal scales do not overlap. Two pale yellow chloroplasts, lateral and parietal, are displaced horizontally, each with an immersed pyrenoid. The flagellar transitional region with a terminal transitional plate.


The generic name refers to the colour and unique asymmetrical cell shape (chryso = golden, culter = knife)

Extra details from original publication

Editors' Notes
The same description was gven for the genus and the single species included in it.


Nakayama, T., Yoshida, M., Noël, M. H., Kawachi, M. & Inouye, I. (2005). Ultrastructure and phylogenetic position of Chrysoculter rhomboideus gen. et sp. nov. (Prymnesiophyceae), a new flagellate haptophyte from Japanese coastal waters. Phycologia. 44(4): 369-383. gs


Chrysoculter: Catalog entry compiled by Jeremy Young. Viewed: 1-10-2022

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes
Link to WoRMS (World Register of Marine Species)

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
Captcha Image
Powered by Commentics