What
Género UlnariaObservador
davidfbirdDescrição
From a meltwater puddle on the quarry floor. 140 µ by 8 µ wide.
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Género CosmariumObservador
davidfbirdDescrição
40 wide by 50 microns long. From a meltwater puddle on the quarry floor.
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Género ChaetonotusObservador
davidfbirdDescrição
140 microns long. From a meltwater puddle thick with filamentous algae.
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Género EnchelydiumObservador
davidfbirdDescrição
From a meltwater puddle that was thick with filamentous green algae. Length 50 µm,
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Litonotus cygnusObservador
davidfbirdDescrição
From a spring runoff tributary, running over a collection of dead leaves (oak, maple, beech, sassafras), at the Grindstone Cascade. Two macronuclei, large posterior contractile vacuole, oral slit along the neck. About 250 µm long extended.
I put a one-minute video of Litonotus cygnus taking a bite out of an amoeba, here: https://www.facebook.com/100070304167055/videos/1136506550825168.
Here's another Litonotus cygnus:https://www.facebook.com/100070304167055/videos/7378433825570870/.
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Borrelho-de-Coleira-Dupla (Charadrius vociferus)Observador
davidfbirdDescrição
I came upon this nest while photographing lichens. I thought at first that it had been abandoned, but on the way back later I saw the skittish parents.
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Enchylium tenaxObservador
davidfbirdDescrição
Two cm colony on moss on soil layer over rock, beside the stream. The reflected colour of the sky is a bit deceptive; the thallus is translucent green-black. Thickened, often ascending margins. No isidia or apothecia. There is occasional white tomentum to affix it to the moss.
Observador
davidfbirdDescrição
From the foam accumulated at rock barriers in the stream, another kind of aquatic hyphomycete conidia. Cells are 2-4 x 1-1.5 µm. I'm not sure of the identification - going out on a limb.
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Observador
davidfbirdDescrição
Conidium of one of the Ingoldian fungi, collected in the foam that accumulated upstream of small rock barriers in the stream. Identified with the aid of Gulis et al. (2020) An Illustrated Key to the Common Temperate Species of Aquatic Hyphomycetes.
https://www.researchgate.net/publication/343345080_An_Illustrated_Key_to_the_Common_Temperate_Species_of_Aquatic_Hyphomycetes
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Anisonema acinusObservador
davidfbirdDescrição
From a meltwater pond on a grassy trail. Length 35 microns. Two unequal flagella, no visible ingestion tools. The second and third gifs show its attempt to ingest a diatom, without success. When I came back later, a large diatom had successfully been consumed (2nd jpg and 4th gif).
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Género PeranemaObservador
davidfbirdDescrição
About 30 µm long. From a vernal pond on the escarpment. I've put a one-minute video of this cell consuming a small green-algal cell using the rod-organ, here: https://www.facebook.com/100070304167055/videos/1064414261681441.
What
Família DalyelliidaeObservador
davidfbirdDescrição
From a vernal pool, about 8 inches deep, 20 x 50 feet, in the forest, on the limestone escarpment. 820 microns long.
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Typhloplana viridataObservador
davidfbirdDescrição
From a vernal pool in the woods, on limestone. Length 615 microns.
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Observador
davidfbirdDescrição
From my homemade birdbath. It's made with an aluminum cake pan, so I wondered where the rust colour had come from over the course of the winter. From the rain or the snow, apparently.
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Dalyellia viridisObservador
davidfbirdDescrição
From a vernal pool in the woods, on the limestone atop the escarpment. Dense zoochlorellae content. It has eyespots, so it's not Typhloplana. It reacted negatively to the condenser light, which made it difficult to photograph. The head is orange-yellow. The tail is simple and pointed. Glides on cilia. Extended length is 2.8 to 3 mm.
What
Hydrobius fuscipesObservador
davidfbirdDescrição
Swimming with an underwater air bubble, among the fallen leaves in a small vernal pond in the forest. Limestone bedrock. Length 6.8 mm.
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Closterium littoraleObservador
davidfbirdDescrição
In a temporary puddle on a grassy trail. Size 280 x 42. It was not laying flat, so it's probably slightly more curved than is apparent. I make out 3 pyrenoids per half-cell - might be more?
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Kamptonema formosumObservador
davidfbirdDescrição
From a small stagnant puddle on a grassy trail, on a warm day. Bright sunshine caused small aggregations of algae to float, producing a noticeable surface film.
The filament was motile, with oscillation and clockwise rotation. Filament width 4-5 microns. Cell length is 50 to 100% of cell width, about 70% on average. Apical cells rounded-conical. No sheath. Cells not or very slightly constricted at crosswalls. Gif is sped up about 20 times.
Ref.: Strunecký, O., Komárek, J. & Smarda, J. (2014). Kamptonema (Microcoleaceae, Cyanobacteria), a new genus derived from the polyphyletic Phormidium on the basis of combined molecular and cytomorphological markers. Preslia (Prague) 86: 193-207.
link: https://www.researchgate.net/publication/286877460_Kamptonema_Microcoleaceae_Cyanobacteria_a_new_genus_derived_from_the_polyphyletic_Phormidium_on_the_basis_of_combined_molecular_and_cytomorphological_markers
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Ordem TintinnidaObservador
davidfbirdDescrição
From a sample of puddles of meltwater along the trail, at the Taquanyah Conservation Area. This ciliate quickly established a flexible lorica attached to the slide within less than an hour. It has a ring of cirri, and a flexible membrane attached to the cytostome. The caudal end was attached to the slide, until it decided to leave. I found it again later - it had started to make a new lorica, until it decided to leave again, presumably because of my efforts to get it into focus. Inside diameter of lorica was 27-32 µm. The only description that does it justice is a series of video excerpts over on fb:
1) https://www.facebook.com/100070304167055/videos/944379230655453/
2) https://www.facebook.com/100070304167055/videos/952767766855031/
3) https://www.facebook.com/100070304167055/videos/883668893770323/
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Género ChromophytonObservador
davidfbirdDescrição
Palmelloid neustonic chrysophyte cells that formed on the surface of a sample from a small ditch along the trail. The rafts of cells appeared within a few hours of sample collection. One or 2 yellow-brown-golden chloroplasts with a refractile stigma. Cell size 6-8 µm or up to 10 µm for dividing/divided cells. Please ignore the ciliate I was pursuing. The second photo is a stacked image of 3 shots, so the mobile ciliate appears three times.
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Observador
davidfbirdDescrição
On a limestone boulder. Spores muriform, hyaline to light brown. Spores 23-(28.2)-38 by 9-(12.7)-15.6. Green algae of two different sizes - the algae in immature perithecia are weirdly tiny, the size of picoplankton, about 2 µm.
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Frontonia angustaObservador
davidfbirdDescrição
From a sample of periphyton collected in a small stream that crosses the trail. Cell length 113 µm. Large central macronucleus and prominent micronucleus. F. acuminata?
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Placynthium nigrumObservador
davidfbirdDescrição
On limestone rock on the trail. Blue prothallus, black thallus heavily isidiate. Tiny lecideine apothecia. Blue-grey-green epihymenium, brown hypothecium. Spores 2-celled, ellipsoidal, 10-12 x 4-6 µm. Secondary phycobiont was Trentepohlia.