Chrysoreinhardia Billard, 2000

Holotype species: Chrysoreinhardia algicola (Reinhard) C.Billard

Original publication and holotype designation: Hoffmann, L., Billard, C., Janssens, M., Leruth, M. & Demoulin, V. (2000). Mass development of marine benthic Sarcinochrysidales (Chrysophyceae s.l.) in Corsica. Botanica Marina 43: 223-231.

Description: Palmelloid cells forming macroscopic gelatinous colonies; in two species these are pulvinate (a few mm in diam.) and epiphytic on sublittoral marine macroalgae or solid substrates, while in the third, C.feldmannii, they are wide-spread and can constitute a supralittoral belt in certain salt-marshes. Young cells hemispherical, older cells globular (up to 10 &m in diam.) surrounded by a conspicuous mucilaginous sheath of variable thickness. Sheath homogenous at first and becoming stratified with age, thus yielding gloeocystoid colonies. Two to 4 yellow to golden-brown chloroplasts, their number increasing with age, each with a bulgingpyrenoid. Chrysolaminaran vacuoles and lipid droplets present. Aspect of young cells granular, due to numerous muciferous bodies which are less apparent in gloeocystoid colonies. Zoospores elongate (3-4 ( 6-7 &m), with 2 short, heterokont flagella (5-6 and 7-8 &m), laterally inserted in the anterior third of the cell. The longer anterior flagellum bears tripartite mastigonemes and pulls the cell forward, while the shorter posterior flagellum is smooth and acronematic. One parietal chloroplast without an eyespot. No stomatocysts or sexual reproduction recorded in culture. Species so far distinguished mainly by their habitat. The two sublittoral species (C.algicola from the Black Sea, and C.giraudii from the Adriatic, the Mediterranean and the Red Sea) are closely related if not conspecific. C.giraudii may form massive developments in the Mediterranean Sea in calm and well lit situations, rarifying below 20 m depth (Hoffmann and others 1999). C.feldmannii, a eurohaline species, is a common coastal organism in France (Billard and Fresnel 1980) and has probably been overlooked elsewhere in northern Europe, if not confused with another closely related organism, Sarcinochrysis marina. Recent analyses of molecular data (Saunders and others 1997) show that both genera have affinities to the Pelagophyceae.

Information contributed by: C.Billard. The most recent alteration to this page was made on 2021-11-26 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.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=44712

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 26 November 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 December 2024