Lepocinclis acus (O.F.Müller) B.Marin & Melkonian .

A euglenoid alga which is previously known as Euglena acus... Euglenoids are a diverse group of unicellular, asexual microalgae that most commonly have two flagella, one or both may be emergent. Many are heterotrophic and others are photosynthetic, having acquired a chloroplast via secondary endosymbiosis of a eukaryotic green alga. One of its principal characteristics is the pellicle. Another particular feature of euglenoids is the presence of paramylon grains, distributed in the cell cytoplasm, as storage carbohydrates or energy reserves. They show great variety in shapes and numbers within the different species.

General freshwater habitant.

This alga usually found in various freshwater habitats like Rivers, lakes, ditches, ponds, swamps, sinkholes, wetlands, village ponds, fishpond, and brackish-water
Can find it in eutrophicated water bodies also... This particular specimen was found in clear freshwater whose pH was neutral (7). Motile euglenoid with flagella.

Most cells were elongated spindles. A few ridged cells were present in many populations and these appeared to conform with L. acus. Most cells contained numerous rod-shaped paramylon grains. In some cells, these were concentrated in two regions, in a few specimens surrounding a dense accumulation of orange-colored droplets.

The alga was collected by Dr. K. Maheswari and analyzed along with Miss. Vinaya Sukumar. Identification confirmed by Euglenophyte taxonomist Mrs. M. Megala.

Oscillatoria princeps Vaucher ex Gomont Algae of Chennai Marshland Chennai Wetland Biodiversity | Chennai Algal Flora

Oscillatoria princeps Vaucher ex Gomont

Oscillatoria princeps is the type species of the cyanobacterial genus Oscillatoria. The cyanobacterium is dark blue-green in colour, due to the presence of the phycobilin pigments phycocyanin and phycoerythrin. Individual filaments are blue-green to olive green in colour.

Trichomes blue-green, highly motile, not constricted at the cross-walls, narrowing toward the often bent ends, 24–36 ?m wide in the central area of the trichome and 14-27 (30) µm wide at the ends. Apical cells nearly hemispherical and often yellowish (together with up to five adjacent cells). Granulation never located at the cross-walls, but fine to larger granules randomly dispersed throughout cells. Cells 2-9 µm long, new cell walls form from the outside of the trichome often before the previous division is finished. Cell wall colourless and thick, necridic cells present, no sheath or calyptra observed.

This particular alga was collected from stagnant water bodies in Chennai City's Wetland area... This alga widely distributed in most wetand areas of Chennai and also other habitats. This alga cosmopolitan in distribution.