Trachelomonas cervicula
From Wikipedia, the free encyclopedia
| Trachelomonas cervicula | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Clade: | Discoba |
| Phylum: | Euglenozoa |
| Class: | Euglenida |
| Clade: | Euglenophyceae |
| Order: | Euglenales |
| Family: | Euglenaceae |
| Genus: | Trachelomonas |
| Species: | T. cervicula |
| Binomial name | |
| Trachelomonas cervicula A.Stokes | |
Trachelomonas cervicula is a species of algae from the genus Trachelomonas.[1] The species was first described by Alfred C. Stokes in 1890.[1][2]
Trachelomonas cervicula is a species of algae that can be found in abundance in fresh water ponds. Its smooth lorica is orange and yellow in colour and almost spherical. It has an anterior, round opening with a thickened, slightly projecting external border. Internally the orifice is a straight projecting external border, and produced internally as a straight, cylindrical, chitinous tube about one-third as long as the diameter of the lorica. This diameter of the lorica is 22–23 μm,[1] 18–23 μm long,[3] and 16–21 μm wide.[3] The flagellum is about 1.5 to 2 times longer than the cell. The cell contains multiple, plate-like chloroplasts which lack pyrenoids.[4]
The species differs from other Trachelomonas species by the presence of the internal tubular prolongation.[1] Within T. cervicula, several varieties have been described. These include:[5]
- T. cervicula var. heterocollis – differs from the typical variety in that the outer part of the collar is wider than the inner tube within the lorica.
- T. cervicula var. annulata – differs from the typical variety in having loricae with a thickened, ring-like ridge near the equator.[5]
