Lagerheimia

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Genus of algae

title: "Lagerheimia" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["trebouxiophyceae-genera", "oocystaceae", "freshwater-algae"] description: "Genus of algae" topic_path: "general/trebouxiophyceae-genera" source: "https://en.wikipedia.org/wiki/Lagerheimia" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of algae ::

| image = Lagerheimia EPA.jpg | image_caption = | taxon = Lagerheimia | authority = Chodat | type_species = Lagerheimia genevensis | type_species_authority = Chodat | subdivision_ranks = Species | subdivision =

Lagerheimia is a genus of green algae in the family Oocystaceae. It is commonly found in freshwater habitats all over the world, although some species are rare and have only been recorded from Europe or the United States.

The genus name of Lagerheimia is in honour of Nils Gustaf Lagerheim (1860–1926), who was a Swedish botanist, mycologist, phycologist, and pteridologist.

The genus was circumscribed by Giovanni Battista De Toni and Robert Hippolyte Chodat in Nuova Notarisia vol.6 on page 86-90 in 1895.

Description

Lagerheimia consists of solitary cells. Cells are spherical, ellipsoidal, ovoid, polyhedral, or citriform (lemon-shaped), with one to several spines at the poles; some species also have spines at the equators. A layer of mucilage around the cell may be present. Cells contain a parietal chloroplast with one pyrenoid.

Species identification is based on the shape of the cells, placement and length of the spines, and presence or absence of tubercles at the base of the spines. The genus is similar to Franceia, which has spines distributed all over the cell surface.

Reproduction

Lagerheimia reproduces asexually by zoospores or autospores. Zoospores have two flagella. When reproducing with autospores, 2, 4, or 8 are formed within the mother cell and are released when the mother cell wall ruptures. Reports of sexual reproduction have not been confirmed.

Taxonomy

Lagerheimia is placed in the family Oocystaceae. The cell wall ultrastructure of Lagerheimia subsalsa is similar to that of some species of Oocystis, and consists of several layers of microfibrils. Microfibrils are perpendicular from one layer to the next.

Because Lagerheimia appears similar to one-celled forms of Desmodesmus, some authors have doubted the validity of this genus. In its current circumscription, Lagerheimia is polyphyletic: some species are more closely related to Franceia than to other Lagerheimia species.

References

References

  1. {{AlgaeBase genus
  2. "NCBI taxonomy resources". [[National Center for Biotechnology Information]].
  3. (2006). "Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições". RiMa Editora.
  4. Burkhardt, Lotte. (2022). "Eine Enzyklopädie zu eponymischen Pflanzennamen". Botanic Garden and Botanical Museum, Freie Universität Berlin.
  5. (1983). "Review of the genus ''Lagerheimia'' Chod. incl. ''Chodatella'' Lemm. (Chlorococcales, Chlorophyceae)". Schweizerische Zeitschrift für Hydrologie.
  6. Species with tubercles at the base of their spines have been classified in a separate genus, called ''Chodatella''; however, modern authors do not recognize this split.{{AlgaeBase genus | 1=Chodatella | id=43428 | access-date=2023-05-12 }}
  7. (2017). "Molecular and morphological delimitation and generic classification of the family Oocystaceae (Trebouxiophyceae, Chlorophyta)". Journal of Phycology.

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trebouxiophyceae-generaoocystaceaefreshwater-algae