Geminella (alga)

Last updated • 1 min readFrom Wikipedia, The Free Encyclopedia

Geminella
Geminella mutabilis as Hormospora mutabilis.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Clade: Viridiplantae
Division: Chlorophyta
Class: Trebouxiophyceae
Order: Chlorellales
Family: Chlorellaceae
Genus: Geminella
Turpin
Type species
Geminella interrupta
Turpin [1]
Species

See below

Geminella is a genus of green algae in the phylum Chlorophyta. [2] [3] [4] Once considered part of the order Ulotrichales, molecular phylogenetics have shown that Geminella and related genera (such as Gloeotilopsis ) form a well-supported clade within the class Trebouxiophyceae. [5]

Contents

Geminella is most often found in fresh water such as swamps, ponds, and lakes, [1] and is often associated with desmids. It has also been reported from terrestrial habitats. [6]

Description

Geminella consists of uniseriate, unbranched filaments either free-floating or attached to a substrate. The cells are generally separated and equidistant, or may be lying in pairs, and are surrounded by a thick mucilaginous sheath. Cells are cylindrical to ellipsoidal to barrel-shaped, with broadly rounded ends. Each cell contains a single parietal chloroplast which is girdle-like or laminate and partially encircling the protoplast; a single central pyrenoid is usually present. [6] [1]

Reproduction occurs by the fragmentation of filaments, or by the production of akinetes with thick brown cell walls. [6] Sexual reproduction or zoospores have not been definitively observed. [1]

It is similar to Gloeotila , and sometimes considered to be the same genus. Some authors separate the two genera based on morphological evidence, with Gloeotila being distinguished by having strictly contiguous cells or the absence of pyrenoids; however, the difference between the two genera is blurry and needs further investigation. [7]

Species

Geminella includes the following species: [1]

Related Research Articles

<i>Prasiola</i> Genus of algae

Prasiola is a genus of macroscopic green algae, found in a variety of habitats ranging from terrestrial, freshwater, to marine. The genus has a cosmopolitan distribution, ranging from the Arctic to the Antarctic.

<span class="mw-page-title-main">Microthamniaceae</span> Family of algae

Microthamniaceae is a family of green algae in the class Trebouxiophyceae. It is the only family in the order Microthamniales.

<span class="mw-page-title-main">Prasiolales</span> Order of algae

Prasiolales is an order of green algae in the class Trebouxiophyceae. Members of this order are ecologically widespread and are found in freshwater, marine, and terrestrial habitats from the Arctic to the Antarctic.

<span class="mw-page-title-main">Botryococcaceae</span> Family of algae

Botryococcaceae is a family of green algae in the class Trebouxiophyceae.

<span class="mw-page-title-main">Prasiolaceae</span> Family of algae

Prasiolaceae is a family of green algae in the order Prasiolales. Members of this family are found in freshwater, terrestrial, and marine habitats.

<span class="mw-page-title-main">Selenastraceae</span> Family of algae

Selenastraceae is a family of green algae in the order Sphaeropleales. Members of this family are common components of the phytoplankton in freshwater habitats worldwide. A few species have been found in brackish and marine habitats, such as in the Baltic Sea.

<i>Chlainomonas</i> Genus of algae

Chlainomonas is a genus of algae in the family Chlamydomonadaceae. They are found in freshwater habitats or on snow, where they are one of the main algae responsible for causing watermelon snow.

<i>Chloromonas</i> Genus of algae

Chloromonas is a genus of green algae in the family Chlamydomonadaceae. It is closely related to the model green algae, Chlamydomonas, and traditionally has been distinguished mainly through the absence of a pyrenoid.

Desmococcus is a genus of green algae in the family Stichococcaceae. It is a subaerial genus of algae with a cosmopolitan distribution.

Dicloster is a genus of green algae in the family Chlorellaceae, containing the sole species Dicloster acuatus. It is found in freshwater habitats as plankton, and is distributed around the world.

Dictyochloris is a genus of green algae in the class Chlorophyceae. It is the sole genus of the family Dictyochloridaceae. It is commonly found in terrestrial and subaerial habitats.

<i>Didymogenes</i> Genus of algae

Didymogenes is a genus of microscopic green algae in the class Trebouxiophyceae. It is a planktonic species found in freshwater habitats worldwide. Formerly placed in the family Scenedesmaceae, molecular studies have placed it in the family Chlorellaceae.

<i>Gloeotila</i> Genus of algae

Gloeotila is a genus of green algae in the class Trebouxiophyceae. It is typically found in freshwater habitats, either attached to surfaces or planktonic, or found in soil.

<i>Koliella</i> Genus of algae

Koliella is a genus of green algae in the order Prasiolales. Members of this genus are found in freshwater plankton, but some are also found on snow and ice.

<i>Lagerheimia</i> Genus of algae

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.

<i>Microthamnion</i> Genus of algae

Microthamnion is a genus of green algae in the family Microthamniaceae. It is found in freshwater habitats around the world, preferably with low levels of pollution; it is typically attached to solid substrates.

<i>Rosenvingiella</i> Genus of algae

Rosenvingiella is a genus of green algae in the family Prasiolaceae. Members of this genus are found in marine or terrestrial habitats.

<i>Stichococcus</i> Genus of algae

Stichococcus is a genus of green algae in the family Stichococcaceae. It is a very common algal genus found in a variety of habitats, such as tree trunks, soil, snow, freshwater and marine habitats. One species, Stichococcus bacillaris is economically important as it produces fatty acids useful for biofuels.

<i>Raphidonema</i> (alga) Genus of algae

Raphidonema is a genus of filamentous green alga comprising five species. It is a member of the Trebouxiophyceae.

<span class="mw-page-title-main">Koliellaceae</span> Family of algae

Koliellaceae is a family of green algae in the order Prasiolales.

References

  1. 1 2 3 4 5 Guiry, M.D.; Guiry, G.M. "Geminella Turpin, 1828". AlgaeBase . University of Galway . Retrieved 2024-01-10.
  2. See the NCBI webpage on Geminella. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information . Retrieved 2007-03-19.
  3. "Geminella". www.gbif.org. GBIF . Retrieved 2021-10-14.
  4. taxonomy. "Taxonomy browser (Geminella)". www.ncbi.nlm.nih.gov. National Center for Biotechnology Information . Retrieved 2021-10-14.
  5. Lemieux, Claude; Otis, Christian; Turmel, Monique (2014). "Chloroplast phylogenomic analysis resolves deep-level relationships within the green algal class Trebouxiophyceae". BMC Evolutionary Biology. 14 (1): 211. Bibcode:2014BMCEE..14..211L. doi: 10.1186/s12862-014-0211-2 . PMC   4189289 . PMID   25270575.
  6. 1 2 3 John, David M.; Rindi, Fabio (2014). "Chapter 8. Filamentous (Nonconjugating) and Plantlike Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN   978-0-12-385876-4.
  7. Fernandes, Ubirajara Lima; Castro, Muryllo Santos; Giroldo, Danilo (2021). "Morphological features of the Geminella protogenita (Kützing) West (Chlorophyta, Trebouxiophyceae): A rare freshwater green alga found in southern of Brazil". Biologia. 76 (10): 2889–2894. Bibcode:2021Biolg..76.2889F. doi:10.1007/s11756-021-00861-3. S2CID   238654411.