| Urceolus cyclostomus | |
|---|---|
| |
| The first illustrations of Urceolus cyclostomus by Friedrich Stein (1878)[1] | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Phylum: | Euglenozoa |
| Class: | Euglenida |
| Order: | Peranemida |
| Family: | Peranemidae |
| Genus: | Urceolus |
| Species: | U. cyclostomus
|
| Binomial name | |
| Urceolus cyclostomus (Stein, 1878) Mereschkowsky, 1881
| |
| Synonyms | |
|
Phialonema cyclostomum
Stein, 1878 | |
Urceolus cyclostomus is a species of heterotrophic flagellates. It was initially described by Friedrich Stein in 1878 as Phialonema cyclostomum, from an unknown location. Due to its morphological similarities to Urceolus alenizini, the author of the latter, Konstantin Mereschkowsky, transferred it to the genus Urceolus in 1881. Like other species of the genus, its cells have a neck and a wide aperture to a canal that hosts a single flagellum and its feeding apparatus. It is distinguished from other species by a significantly more rigid cell shape, among other traits. It can be found in the bottom sediment of freshwater and brackish water bodies, as a consumer of algae.