Euglenales

Euglena velata. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

Euglena velata. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

This image shows two species of Euglena, Euglena velata (the green cells) and Euglena sanguinea (the red cells). Low magnification image.

Euglena velata is a medium-sized Euglena with large flat plastids with central pyrenoid regions. The cytoplasm often has many fine granules. Differential interference contrast optics.

Euglena velata is a medium-sized Euglena with large flat plastids with central pyrenoid regions. The cytoplasm often has many fine granules. Eyespot and paramylon polysaccharide by-product are visible. Animations by Rosemary Arbur of flagellar beat patterns are available here.Differential interference contrast optics.

Portrait of the euglenoid flagellate (Ehrenberg,1830).Collectedfrom a slow-flowing freshwaterstream near Boise, Idaho. November,2005.DIC.

Euglena agilis. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

Euglena agilis. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics.   This work was supported by the Australian Biological Resources Study.

Portrait of empty Trachelomonas armata lorica. This variety of T. armata has anterior and posterior spines of differing lengths and a smooth intervening surface and the species differs from T. hispida which is covered with shorter spines of uniform length. From freshwater pond near Boise, Idaho. Brightfield

Portrait of empty Trachelomonas armata lorica. This variety of T. armata has anterior and posterior spines of differing lengths and a smooth intervening surface and the species differs from T. hispida which is covered with shorter spines of uniform length. From freshwater pond near Boise, Idaho. Brightfield

Trachelomonas hispida. Cell with broken lorica observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

Trachlomonas hispida (Euglenophyta) creeping out of its lorica - stage 1. Note long flagellum protruding from the base of the lorica and extending to the left.

Trachelomonas hispida (Euglenophyta) creeping out of its lorica-stage 2

Portrait of the loricate euglenoid flagellate, Trachelomonas reticulata (Klebs, 1833) Synonym: T. obovata v. klebsiana (Deflandre). The lorica is egg-shaped. The collar of the flagellar pore of the lorica is flush with the surface. Spines are absent. The lorica has closely spaced rows of scrobiculations (shallow depressions) arranged in a left-hand spiral. The brittle lorica is light brown due to deposition of mineral salts. There is one emergent flagellum about 3 cell lengths. T. reticulata is one of the few colorless species of this genus. A separate genus, Hyalotrachelomonas (analogous to Hyalophacus), for colorless species has been suggested but not widely accepted. The cells can be examined after the pressure of a coverslip fractures the lorica. The flexible, colorless cells contain paramylon and there is a prominent red stigma (visible here). There is a single anterior contractile vacuole. The spherical nucleus is centrally located. Collected from a temporary rainwater pool with decaying grass near Boise, Idaho, March 2005. DIC.

Detail view of the lorica of the euglenoid flagellate, Trachelomonas reticulata (Klebs, 1833) Synonym: T. obovata v. klebsiana (Deflandre). The lorica is egg-shaped. The collar of the flagellar pore of the lorica is flush with the surface. Spines are absent. The lorica has closely spaced rows of scrobiculations (shallow depressions) arranged in a left-hand spiral (seen here). The brittle lorica is light brown due to deposition of mineral salts. There is one emergent flagellum about 3 cell lengths. T. reticulata is one of the few colorless species of this genus. Collected from a temporary rainwater pool with decaying grass near Boise, Idaho, March 2005. DIC.

Portrait of the loricate euglenoid flagellate, Trachelomonas reticulata (Klebs, 1833) Synonym: T. obovata v. klebsiana (Deflandre). The lorica is egg-shaped. The collar of the flagellar pore of the lorica is flush with the surface. Spines are absent. The lorica has closely spaced rows of scrobiculations (shallow depressions) arranged in a left-hand spiral (visible on lorica fragments here). The brittle lorica is light brown due to deposition of mineral salts. There is one emergent flagellum about 3 cell lengths. T. reticulata is one of the few colorless species of this genus. A separate genus, Hyalotrachelomonas (analogous to Hyalophacus), for colorless species has been suggested but not widely accepted. The cells can be examined after the pressure of a coverslip fractures the lorica (as seen in this image). The flexible, colorless cells contain paramylon and there is a prominent red stigma. There is a single anterior contractile vacuole. The spherical nucleus is centrally located. Collected from a temporary rainwater pool with decaying grass near Boise, Idaho, March 2005. DIC.

Trachelomonas volvocina. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics.   This work was supported by the Australian Biological Resources Study.

Phacus monilatus. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics.   This work was supported by the Australian Biological Resources Study.

Phacus monilatus. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

Phacus monilatus. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.

Phacus monilatus. Cell observed in freshwater habitats in the vicinity of Broome, Western Australia in September 2003. This image was taken using differential interference contrast optics.   This work was supported by the Australian Biological Resources Study.