From a macrophyte bed on the lakeshore of a eutrophic lake. No sheath, aerotopes or heterocytes. Motile, 5-5.5 x 8.5 µm W x L. Cells constricted in the middle and at crosswalls. Terminal cells slightly swollen, rounded.
Merismopedia regularis Komárek&Cronberg identified with kind help of Jan Pokorný, who is a specialist in this genus.
Species described from African lakes, now found in shallow hypertrophic Albufera lagoon in Valencia, Spain.
Lemmermanniella flexa Hindák with a little longer cells in old colonies, which sometimes happens to specimen of similar genera.
Planktonic, Atkinsons Dam
DIC x400 magnification
Variedad de Monactinus (Pediastrum simplex). Fitoplancton.
Magnification of all photos: 1000× (oil immersion)
Habitat: planktonic algae from a small artificial fishpond.
Using stage micrometer for calibration, estimated to be about 61 µm long, 46 µm wide, and with isthmus 19 µm wide.
Magnification of all photos: 1000× (oil immersion)
Habitat: planktonic matter from the edge of a large freshwater pond.
Using stage micrometer for calibration, colony estimated to be about 14 µm wide.
Proctor Lake: scrubbed off of driftwood near shore
Video: https://youtu.be/U-WuPI9VD50
Sampling location: The soil sample was collected from the bank of a pond on the Bagaryak River, near the water. The soil was wet but gradually dried out.
Date and time of collection: September 8, 2023
The sample was stored in a sealed glass container at room temperature.
On September 22, 2023, at 1 PM, a small amount of this soil was mixed with clean water.
Date and time of observation: September 22, 2023, at 1 PM.
Magnification of photos: 400×, 400×, 400×, 400×, 400×, 400×, 100×
Habitat: muddy water from the border of a swamp lining Creve Coeur Lake, a large oxbow lake. Associated plants: Cephalanthus occidentalis
Multiple colonies present in sample. Using stage micrometer for calibration, individual cells estimated to be about 5-5.5 µm by 4-4.5 µm.
Planktonic, Lake Lenthalls
DIC x400 magnification
Planktonic, Blue Lake, Naree Budjong Djara National Park, North Stradbroke Island (Minjerribah)
DIC x400 magnification (preserved specimens)
Planktonic, Wilson's Waterhole, Mitchell River
DIC x400 magnification (preserved specimen)
Planktonic, Oxley Creek Common Lake
DIC x400 magnification
Planktonic, Magnificent Creek
DIC x400 magnification (preserved specimen)
Planktonic, Wilson's Waterhole, Mitchell River
DIC x400 magnification (preserved specimen)
Planktonic, White Water Waterhole, Mitchell River
DIC x400 magnification (preserved specimen)
Benthic/metaphytic, Nudgee Waterhole
DIC x1000 magnification
Trichomes straight or flexuous, 1.0-2.5 µm broad. Cells cylindrical up to 2 x longer than broad, 1.7-7.5 µm long, deeply constricted at the cross walls, appearing separated by hyaline bridges, refractive gas vacuoles visible at the poles.
Planktonic, Lake MacDonald
DIC x400 magnification
Planktonic, Cooloolabin Dam
DIC x400 magnification
Planktonic, Lake MacDonald
DIC x400 magnification
Planktonic, Cooloolabin Dam
DIC x 400 magnification
Colonies mucilaginous, irregularly lobate, clathrate or composed of sub-colonies, cells generally densely packed. Cells spherical, slightly elongated during division, 4-7 µm in diameter, with aerotopes.
Pseudanabaena mucicola visible in the mucilage of this specimen.
Magnification of photos: 400×, 400×, 400×, 400×, 400×, 1000× (oil immersion)
Habitat: muddy water from the edge of a shallow pond, collected with Ceratophyllum sp.
Using stage micrometer for calibration, estimated to be about 87 µm long and 66 µm wide.
Planktonic, Oxley Common Lake
DIC x400 magnification
Littoral zone, South Pine River at Bunya Crossing
DIC x400 magnification
Littoral zone amongst aquatic macrophytes, Lake Wivenhoe
DIC x400 magnification
In same bloom as Euglena cf caudata, but less abundant.
From sample taken August 10, 2024.
From sample taken August 10, 2024.
Growing on rotting sedge leaves submerged in shallow edges of a pond.
From sample taken August 10, 2024.
Scale = 2.55um
From sample taken August 10, 2024.
interesting branching structure that has me perplexed.
Planktonic, Wongi Waterholes
DIC x400 magnification
Planktonic, Racecourse Swamp, Kowanyama.
DIC x400 magnification (preserved specimen)
Planktonic, Yelko Waterhole, Mitchell River
DIC x400 magnification (preserved specimen)
Visible algal mat downstream of a sewage treatment plant.
Planktonic, Poona Lake, Cooloola Recreation Area, Great Sandy National Park
DIC x400 magnification
Benthic, Christmas Creek at Stinson Park
DIC x400 magnification
Benthic, Moggill Creek at Upper Brookfield
DIC x400 magnification
Benthic, Babinda Creek at the Boulders
DIC x400 magnification
Benthic, Little Yabba Creek at Mary River
DIC x400 magnification
Metaphytic, Talaroo hot springs
DIC x400 magnification (preserved sample)
Metaphytic, Rainbow Beach Fen, Cooloola Recreation Area, Great Sandy National Park
DIC x400 magnification
Planktonic, Yelko Waterhole
DIC x400 magnification (preserved specimen)
Planktonic, Blue Lake, Naree Budjong Djara National Park, North Stradbroke Island (Minjerribah)
DIC x400 magnification
Metaphytic, Lake Freshwater, Cooloola Recreation Area, Great Sandy National Park
DIC x400 magnification
Planktonic, Blue Lake, Naree Budjong Djara National Park, North Stradbroke Island (Minjerribah)
DIC x400 magnification
Planktonic, Blue Lake, Naree Budjong Djara National Park, North Stradbroke Island (Minjerribah)
DIC x400 magnification
Planktonic, Lake Lenthalls
DIC x400 magnification
Benthic, Condamine River at Chinchilla Weir
DIC x400 magnification (preserved specimen)
Metaphytic/benthic, Poona Lake, Cooloola Section, Great Sandy National Park.
DIC x400 magnification
Small sample of soil and moss taken from edge of dry rockpool on top of dry sandstone hilltop and kept at room temperature for several weeks. Water added and kept at room temperature for several days. Samples taken by dropper over next few weeks and examined microscopically.
Small sample taken of soil and moss from edge of dry rockpool on exposed sandstone hilltop and kept at room temperature for several weeks. Water added and kept at room temperature for several days. Samples taken by dropper over next few weeks and examined microscopically.