Lagynion Pascher, 1912

Holotype species: Lagynion scherffelii Pascher

Original publication and holotype designation: Pascher, A. (1912). Eine farblose rhizopodiale Chrysomonade. Berichte der deutsche botanischen Gesellschaft 30: 152-158.

Description: Cells rhizopodial, solitary, surrounded by a lorica. Lorica flask-shaped with or without long neck, in most species fixed to a substratum by one side and often brownish with iron salts. The taxonomy within the genus is based on lorica morphology. Cells spherical, not fixed within the lorica. Apically they have delicate, branched rhizopodia emerging through the lorica neck. 1-2 chloroplasts, no stigma, but contractile vacuoles posteriorly. Reproduction by division. One daughter cell (withoutflagella) leaves the lorica, fastens itself to a substratum on a suitable place and forms a new lorica. No flagellated stages known. Stomatocysts unknown. The genus may be divided in 3 subgenera: Lagynion with lorica fixed to a substratum, Eleuteropyxis with a free lorica with straight neck, and Plagiorhiza with free lorica and oblique neck. Epiphytic, and rather common in freshwaters of Europe and North America.

Information contributed by: J. Kristiansen. The most recent alteration to this page was made on 2021-10-19 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 neuter.

Most recent taxonomic treatment adopted: Kawai, H. & Nakayama, T. (2015). Introduction (Heterokontobionta p.p.), Cryptophyta, Dinophyta, Haptophyta, Heterokontophyta (except Coscinodiscophyceae, Mediophyceae, Fragilariophyceae, Bacillariophyceae, Phaeophyceae, Eustigmatophyceae), Chlorarachniophyta, Euglenophyta. In: Syllabus of plant families. Adolf Engler's Syllabus der Pflanzenfamilien. Ed. 13. Phototrophic eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachnniophyta/Cercozoa, Chlorophyta, Streptophyta p.p. (Frey, W. Eds), pp. 11-64, 103-139. Stuttgart: Borntraeger Science Publishers.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=43798

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 19 October 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 03 May 2024