Biology:Nephrocytium
Nephrocytium is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae.[1]
The name Nephrocytium is derived from the Ancient Greek νεφρός (nephrós, "kidney") and κύτος (kytos, "vessel").[2]
Description
Nephrocytium consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast lining the inside of the cell membrane, each with one pyrenoid.[3]
Reproduction occurs asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle.[1]
Identification
Similar genera include Nephrochlamys and Juranyiella; Nephrochlamys differs in having cells that lack pyrenoids, while Juranyiella has granules dotted on the cell wall surface.[4]
Species are distinguished mainly by the shape of the cells (particularly at their apices), cell sizes, and length-to-width ratios. However, cells enlarge during their life cycle, which must be taken into account while identifying Nephrocytium species.[1]
References
- ↑ 1.0 1.1 1.2 Silva, Thaís Garcia; Štenclová, Lenka; Archanjo, Naiara Carolina Pereira; Bagatini, Inessa Lacativa (2021). "Revised phylogenetic position of Nephrocytium Nägeli (Sphaeropleales, Chlorophyceae), with the description of Nephrocytiaceae fam. nov. and Nephrocytium vieirae sp. nov.". Taxon 70 (5): 917–930. doi:10.1002/tax.12560.
- ↑ Rabenhorst, L. (1853). Kryptogamen-Flora von Sachsen, Ober-Lausitz, Thüringen und Nord-Böhmen, mit Berücksichtigung der benachbarten Länder: erste Abtheilung: Algen im weitesten Sinne, Leber und Laubmoose. Leipzig: Verlag von Eduard Kummer. pp. i-xx, 1-653.
- ↑ Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial Green Algae". Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc.. ISBN 978-0-12-385876-4.
- ↑ G. Dillard (17 Aug 2004). "Nephrocytium Genus detail". AlgaeBase. http://www.algaebase.org/search/genus/detail/?genus_id=43440. Retrieved 2007-09-19.
Wikidata ☰ Q6995155 entry
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