Ectogeron P.-A.Dangeard, 1947

Holotype species: Ectogeron elodeae P.A.Dangeard

Currently accepted name for the type species: Chlorochytrium lemnae Cohn

Original publication and holotype designation: Dangeard, P.[-A.] (1947). Sur un genre nouveau de Chlorophycée épiphyte d'eau douce (Ectogeron Elodeae, nov. gen. nov. sp.). Le Botaniste 33: 3-18.

Description: Solitary cells epiphytic or on various substrata; in surface view spherical to amorphous in outline. Cells distinctly flattened, to 50-60 &m diameter and to 15 &m high. Cell walls thicker on upper side of cell with wrinkled surface. Cells uninucleate; chloroplast parietal; when young, pyrenoid single, later 15-20. Asexual reproduction by biflagellate zoospores and aplanospores; up to 64-128 spores per sporangium. Zoospores flattened, 7-9 x 6-7 x 2.5-3.5 &m, with contractile vacuoles and parietal chloroplast with pyrenoid and stigma. Sexual reproduction isogamous. Ectogeron mostly epiphytic on submerged macrophytes in freshwater; reported only from France and Austria. Taxonomic position of Ectogeron unclear with genus variously assigned to Characiaceae or Chlorochytriaceae.

Information kindly contributed by D. Garbary and T. Kalina but may now be outdated.

Taxonomic status: This name is currently regarded as a synonym of .

Most recent taxonomic treatment adopted: Wujek, D.E. & Thompson, R.H. (2005). Endophytic unicellular chlorophytes: a review of Chlorochytrium and Scotinosphaera. Phycologia 44: 254-260.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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. 24 September 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 20 April 2024