Nannotax3 - ntax_Farinacci - Hymenomonadaceae

CATALOG - Hymenomonadaceae

Folder trail: ntax_Farinacci -> H -> Hymenomonadaceae
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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: Hymenomonadaceae Senn 1900
Rank: Family
Type species: Type genus: Hymenomonas Stein
Farinacci catalog page (& compiler): n/a

Original Description



Extra details from original publication

Editors' Notes
Emended Diagnosis of Probert, Fresnel & Young 2014
Calcifying diploid generation: Cells with coccoliths (muroliths) and non- calcified body scales. Coccoliths elliptical, consisting of base plate scale with or without upright rim on the distal face, 5-30 solid calcareous rim elements and open central area. Calcareous rim consisting of either solid rectangular elements with distal flange/pointed end and proximal flange or stacked strands. Body scales with identical ornamentation on both faces. Cells non-motile or motile; if motile, two equal flagella. Usually without emergent haptonema and haptonematal root consisting of 5 microtubules.

Non-calcifying haploid generation: Cells without coccoliths. Periplast covered by two types of scale: several layers of rimless body scales and a single layer of distal scales with upright rim on distal face. Body scales with differing ornamentation on distal and proximal faces. Cells non-motile or motile; if motile, two equal flagella. Usually without emergent haptonema. Cells solitary or in aggregations, with or without mucous covering, never pseudofilamentous.


Probert, I., Fresnel, J. & Young, J. R. (2014). The life cycle and taxonomic affinity of the coccolithophore Jomonlithus littoralis (Prymnesiophyceae). Cryptogamie Algologie. 35(4): 389-405. gs

Senn, G. (1900). Chrysomonadineae. In, Engler, A. & Prantl, K. (eds) Die natürlichen Pflanzenfamilien. Engelmann, Leipzig 151-167. gs V O


Hymenomonadaceae: Catalog entry compiled by Jeremy Young. Viewed: 29-9-2022

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

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