Entosiphon | |
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Differencial interference contrast micrograph of Entosiphon oblongum. Scale bar: 10 μm. | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Clade: | Discoba |
Phylum: | Euglenozoa |
Class: | Euglenida |
Family: | Entosiphonidae Cavalier-Smith 2016 [1] |
Genus: | Entosiphon Stein 1878 [2] |
Type species | |
Entosiphon sulcatum (Dujardin 1841) Stein 1878 | |
Other species | |
Entosiphon is a genus of euglenids. It was described by Friedrich Stein in 1878.
Entosiphon is a genus of phagotrophic euglenids, single-celled flagellates with two flagella characterized by a protein pellicle present beneath the cell membrane. In particular, Entosiphon cells are distinguished by a protrusible ingestion apparatus. Their pellicle is composed of twelve protein strips. [3]
The genus Entosiphon was described by Friedrich Stein in 1878. It was established to transfer a species of Anisonema , A. sulcata, to a separate genus, which changed the original spelling of this species to E. sulcatum. [2] A second species, E. oblongum, was described in 2016. [4] The genus was placed in a separate family Entosiphonidae the same year. [1]
The evolutionary position of Entosiphon among euglenids is unstable, either branching with Hemiolia and Liburna or forming a separate branch, depending on the methods and datasets used. In all cases, it consistently branches among basal, non-flexible euglenids, outside of any major euglenid group. [3] [5]