Triploceras
| Triploceras | |
|---|---|
| Triploceras gracile | |
| Scientific classification Edit this classification | |
| Clade: | Viridiplantae |
| (unranked): | Charophyta |
| Class: | Zygnematophyceae |
| Order: | Desmidiales |
| Family: | Desmidiaceae |
| Genus: | Triploceras Bailey |
| Type species | |
| Triploceras verticillatum (Bailey) Bailey[1]
| |
| Species | |
Triploceras is a genus of desmid (a type of green alga) in the family Desmidiaceae.[2]
Description
[edit ]Triploceras exists as solitary cells, which are elongated and constricted at the middle (the constriction called an isthmus); the two halves are called semicells. At tip of either semicell, the cell is tipped with spiny lobes, similar to the polar lobes found in Micrasterias . Along the margins of the semicells are many whorls of processes that may be tipped with spines or teeth. Cells have one chloroplast filling the cell.[3]
Identification
[edit ]Triploceras is easily recognizable due to its elongated shape and polar lobes.[3] The similar genus Triplastrum also has polar spines, but lacks protuberances along the sides of the cell.[4]
Phylogeny
[edit ]Phylogenetically, Triploceras is currently known to be embedded within the genus Micrasterias.[3] [4] Despite the similar rod-like shape, it is not closely related to other rod-shaped genera such as Pleurotaenium or Triplastrum.[4]
Distribution
[edit ]Two species, Triploceras gracile and T. verticillatum are widely distributed throughout the world. Another species, T. splendens is rare and restricted to Southeast Asia and northern Australia.[1]
References
[edit ]- ^ a b c Guiry, M.D.; Guiry, G.M. "Triploceras". AlgaeBase . University of Galway.
- ^ See the NCBI webpage on Triploceras. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information . Retrieved 2007年03月19日.
- ^ a b c Hall, John D.; McCourt, Richard M. (2014). "Chapter 9. Conjugating Green Algae Including Desmids". 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.
- ^ a b c Škaloud, P.; Št'astný, J.; Nemjová, K.; Mazalová, P.; Poulíčková, A.; Neustupa, J. (2012). "Molecular phylogeny of baculiform desmid taxa (Zygnematophyceae)". Plant Systematics and Evolution. 298 (7): 1281–1292. doi:10.1007/s00606-012-0634-4. S2CID 254052751.
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