המועדפים של mallomonas
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geraldojprתיאור
Mateola is an endemic desmid genus from the Tropical region of American continent
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geraldojprמקום
Rua Marquês de Paranaguá nº200 - caixa 209 - Centro, Ilhéus - BA, 45653-020, Brasil (Google, OSM)תיאור
A Tropical variety of Micrasterias torreyi
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shanesmicroscopeתיאור
Specimen rolled over partway through the observation, allowing a nice observation of two aspects.
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kenkתיאור
Marine sample gathered with a 20µm net.
Time 10:15 AM
Weather: Clear, Sunny
Air temp: 11C
Water Temp: 9C
Salinity: 35ppt.
Wind: 0-10 NE
Tide: Approximately 2.0 ft. Incoming
Secchi depth: 340 cm
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kenkתיאור
Reproduction by budding, or is it division?
Time 9:40 AM
Weather: Cloudy
Air temp: 10C
Water Temp: 12C
Salinity: 33ppt.
Wind: 0-5 MPH, NW
Tide: High tide, 6.67ft. (King tide)
Secchi depth: 340 cm
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mnold1תיאור
Mag. 400x
Longish (200µ). U. piscis? Looks like 3 rows of ventral cirri... diagnostic?
@bdstaylor, @shanesmicroscope, @crseaquist
- A pond-side water sample was taken on 12/27/2021 using a 10µ dip net. About 1/4" of ice had to be broken and pushed aside to access the water. Air temp. 36°F.
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mnold1תיאור
Mag. 400x (1), 100x (2,3)
Somewhat evenly spaced clusters of yellow-brown cells on a strand of Eunotia sp. cells. Algal epiphytes? Egg deposits?
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מה
חיים (חיים)מתצפת.ת
mnold1תיאור
Mag. 400x (freshwater)
Uniformly oval. Regularly spaced spikes. There is also a smaller spike-covered object (rod shaped?), just behind or in front of the large oval. (I can't tell where the focal plane is sitting.) The smaller object is visible in the lower panels of the photo composite, image 2. If the primary object is an egg case, what is the smaller spiky object? Perhaps the smaller object is a peal projecting from the large oval...like projecting panel from an opening chestnut. Interesting!
- A pond-side water sample was taken on 12/27/2021 using a 10µ dip net. About 1/4" of ice had to be broken and pushed aside to access the water. Air temp. 36°F.
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מתצפת.ת
mnold1תיאור
Mag. 400x
13 dorsal margin undulation. As seen here https://diatoms.org/species/eunotia_serra. (note: this taxa can have 6-22 dorsal margin undulations)
- A pond edge water sample (freshwater) was taken on 2/9/2022 using a 10 micron dip net to enrich for microorganisms. Air temp. 41C. Sampling area was free of ice due the water flow through a nearby culvert.
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mnold1תיאור
Mag. 400x (1,2), 100x (3)
- Estuarine environment (brackish). A river-side water sample was taken on 1/27/2022 using a large plastic cup to scoop rocks, organic debris, ice and water (no sand or soil). The settled material was retained along with some of the water. Air temp. 30°F.
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kenkתיאור
Time 3:30 PM
Weather: Clear
Air temp: 12C
Water Temp: 8.5C
Salinity: 34ppt.
Wind: 10-20 MPH, NNE
Tide: High tide 2.95
Secchi depth: 340cm
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crseaquistתיאור
A stream water sample (freshwater) was taken on 11/06/2021 using a 10 micron dip net to enrich for microorganisms.
Moved 50-100µm in less than a minute.
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shanesmicroscopeתיאור
Philodina laying an egg. For some reason the Dexiotricha were very interested in the proceedings.
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crseaquistתיאור
A pond edge water sample (freshwater) was taken on 10/19/2021 using a 10 micron dip net to enrich for microorganisms.
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mnold1תיאור
Mag. 400x
Each spine is rooted in a circular scale (photo 2). Circular egg (photo 4)?
A pond edge water sample (freshwater) was taken on 10/14/2021 using a 10 micron dip net to enrich for microorganisms.
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louiselewisתיאור
Collected from a freshwater pool in the Ecology and Evolutionary Biology Greenhouse.
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mnold1תיאור
Mag. 400x (1, 4gif,6), 100x (2,5), 25x (3)
By far (>95%), this was the predominant specie netted during this collection... a bloom of C. longispina. Each cell has several, long siliceous spines and 2 flagella (one short, one long) http://www.diatom.org/lakes/taxa/chryso/Chrysosphaerella/TB-Chrysosphaerella_longispina.htm. Image 3 is a gif; careful inspection will show flagellar movement. -- The slide was allowed to dry and then reexamined after several days, see image 5. The drying process appears to have released some of the spines from the cells. Their double-headed nail-like structure is apparent in image 6 (also see http://cfb.unh.edu/phycokey/Choices/Synurophyceae/CHRYSOSPHAERELLA/Chrysosphaerella_Image_page.html)
A pond edge water sample (freshwater) was taken on 10/14/2021 using a 10 micron dip net to enrich for microorganisms.
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shanesmicroscopeתיאור
A sample of seaweed collected from the beach at Ocean City, NJ.
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mnold1תיאור
Mag. 400x
16-cell colony. Each cell is tethered to a single stalk that converges, by tetrachotomous branching, in the center of the colony; there are 4 cells at the end of each major branchlet. The bottom frame in the composite photo (last photo) best shows the branching system. Compare to images here https://www.algaebase.org/search/species/detail/?species_id=176802&sk=0&from=results.
A pond edge water sample (freshwater) was taken on 10/1/2021 using a 10 micron dip net to enrich for microorganisms.
