Ankylochrysis C.Billard, 1995

Holotype species: Ankylochrysis lutea (van der Veer) Billard

Original publication and holotype designation: Honda, D. & Inouye, I. (1995). Ultrastructure and reconstruction of the flagellar apparatus architecture in Ankylochrysis lutea (Chrysophyceae, Sarcinochrysidales). Phycologia 34: 215-227.

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Description: Unicells, characteristically beanshaped (4(7 &m), with a convex dorsal side. Two short, heterokont flagella (7-9 and 5-8 &m), inserted side by side in an oblique, forwardly directed, ventral furrow. Cells not ameboid, an external layered theca ensuring rigidity of the periplast. Swimming movements jerky and directed forward by the longer mastigoneme-bearing flagellum, which shows an S posture in resting cells. Posterior flagellum smooth, acronematic. Cells not phototactic. A single parietal bright yellow chloroplast, with no eyespot present; an embedded pyrenoid transected by a pair of thylakoids, visible in thin-sections only. Usually one large posterior chrysolaminaran vacuole, and several lipid droplets. Stomatocysts and sexual reproduction not recorded. Rarely observed. A.lutea has been reported from tide-pools or oysterbasins along the coasts of northern Europe (England and France) and more recently from Mukoujima Island, Japan (Honda and Inouye 1995). Ankylochrysis is probably a cosmopolitan marine flagellate, and chiefly a neritic organism. This alga was formally placed in the xanthophycean genus Ankylonoton (Van der Veer 1970).

Information contributed by: C.Billard. The most recent alteration to this page was made on 2021-10-08 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Han, K.Y., Graf, L., Reyes, C.P., Melkonian, B., Andersen, R.A., Yoon, H.S. & Melkonian, M (2018). A re-investigation of Sarcinochrysis marina (Sarcinochrysidales, Pelagophyceae) from its type locality and the descriptions of Arachnochrysis, Pelagospilus, Sargassococcus and Sungminbooa genera nov. Protist 169: 79-106, 12 figs, 2 tables.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024