Photos / Sounds

Observer

mnold1

Date

February 10, 2022 02:47 PM EST

Description

Mag. 400x
Highly motile (2 flegella) protist with yellow-brown chloroplasts (for photosynthesis) as well as a "mouth" and gullet for ingesting particulate food from the environment. The transparent pouch along with the bead-like cluster (beads = ejectosomes - for subduing prey or used defensively) are part of the feeding apparatus. This specimen is similar to those pictured here (Figures 10-12) https://www.researchgate.net/publication/264178674_Taxonomy_and_phylogeny_of_the_genus_Cryptomonas_Cryptophyceae_Cryptophyta_from_Korea/figures?lo=1. For life history details go here http://coo.fieldofscience.com/2017/08/cryptophytes-four-genomes-for-price-of.html. For a video of the current specimen in motion go here https://youtu.be/Uu2H_ltuFTA (worth a peek!)

  • 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.

Photos / Sounds

What

Common Dogwood (Cornus sanguinea)

Observer

roman_romanov

Date

September 25, 2022 10:43 PM CEST

Photos / Sounds

Observer

mnold1

Date

September 19, 2022 02:27 PM EDT

Description

Mag. 400x
A filamentous desmid as seen here http://www.digicodes.info/Spondylosium_rectangulare.html#2007020004.

  • A water sample was taken on 09/13/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 71°F. (Sample was stored at room temperature and assayed again on 9/19/2022.)

Photos / Sounds

Observer

mnold1

Date

September 13, 2022 08:53 PM EDT

Description

Mag. 400x
Filamentous desmid. Long cells (terminal cell of this short chain, 285µ x 15µ). The spines appear longer than similar Gonatozygon seen in other local bodies of water. Unsure of the species, G. pilosum, G. aculeatum, or G. Gonatozygon monotaenium. Please help. Thank you!

  • A water sample was taken on 09/13/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 71°F.

Photos / Sounds

Observer

roman_romanov

Date

September 13, 2022 01:05 PM CEST

Photos / Sounds

Observer

mnold1

Date

March 15, 2022 10:05 PM EDT

Description

Mag. 100x (1), 400x (2&3)
Large, transparent rotifer, similar to Testudinella patina as seen here (similarly retracted into lorica) https://www.biolib.cz/en/image/id294315/. The video shows no movement except within the digestive tract https://youtu.be/eupS0zwgEhk.

  • A bog water sample was taken on 3/15/2022 using a turkey baster swished among the submerged stems of sphagnum moss. (The area sampled was ~circular, only 15' across, and was dominated by sphagnum. Large trees and shrubs shaded the area; a small brook flowed from the circular impoundment.) Air temp. 50F

Photos / Sounds

Observer

mnold1

Date

August 27, 2022 05:27 PM EDT

Description

Mag. 400x
A 6-arm Staurastrum with parasitic fungi (granular spheres) distributed around its isthmus. See recent observation https://www.inaturalist.org/observations/134372677 and a previous observation https://www.inaturalist.org/observations/96601793 for discussion regarding identification. In this latter observation, phycologist Geraldo Ramos, notes that the presence of 5 or 6 arms on the semi-cell can be S. lemneticum variant-dependent.

  • A water sample was taken on 08/27/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 80°F.

Photos / Sounds

What

Common Fig (Ficus carica)

Observer

roman_romanov

Date

September 9, 2022 07:32 PM CEST

Photos / Sounds

What

Rough Bindweed (Smilax aspera)

Observer

roman_romanov

Date

September 9, 2022 08:05 PM CEST

Photos / Sounds

Observer

mnold1

Date

August 10, 2022 05:33 PM EDT

Description

Mag. 400x
An algal colony in decline (perhaps Pandorina)? ...Or is this one of Dr. Seuss' infamous green eggs?

  • A water sample was taken on 08/10/2022 from pond-edge using a 10µ dip net to enrich for microbes. Air temp. 82°F.

Photos / Sounds

Observer

mnold1

Date

August 27, 2022 05:15 PM EDT

Description

Mag. 400x
Small, very round Arcella test with slight undulations its surface. The aperture has a curled lip as noted and pictured here https://arcella.nl/arcella-hemisphaerica/.

  • A water sample was taken on 08/27/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 80°F.

Photos / Sounds

Observer

shanesmicroscope

Date

July 2022

Description

cf. uncinata?

Photos / Sounds

Observer

mnold1

Date

August 27, 2022 04:08 PM EDT

Description

Mag. 400x.
Desmid with round semi-cells and large mucilaginous capsule (marked by white lines in right panel of first image). Narrow isthmus with wide open sinuses. I think this is Cosmarium fuelleborniforme, as seen here http://www.digicodes.info/Cosmarium_fuelleborniforme.html. Even though this specimen looks a lot like Sondylosium panduriforme, including the presence of a broad capsule (this latter taxon was also identified in this water sample), but the current specimen is about twice as long and wide as S. panduriforme cells (as seen here https://www.inaturalist.org/observations/132721823)

  • A water sample was taken on 08/27/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 80°F.

Photos / Sounds

Observer

trientalid

Date

August 23, 2022 12:38 PM PDT

Photos / Sounds

Observer

mnold1

Date

August 27, 2022 03:53 PM EDT

Description

Mag. 400x
Not moving. Cluster of 3 prominent spines or caudal cilia. Appears to have a geometric pattern of scales.
Coleps? Trachelomonas?-

  • A water sample was taken on 08/27/2022 from the shore of Long Pond using a 10µ dip net to enrich for microbes. Air temp. 80°F.

Photos / Sounds

Observer

mnold1

Date

August 10, 2022 07:52 PM EDT

Description

Mag. 400x
Pair of small Cosmarium sp. cells; overall cell size, ~18µ L x ~15µ W. Closest ID, to my eye, is C. regnellii as seen here http://www.digicodes.info/Cosmarium_regnellii.html and http://protist.i.hosei.ac.jp/PDB/Images/Chlorophyta/Cosmarium/Microcosmarium/regnellii/sp_2.html. These references note that the shape of C. regnellii is variable. Among the examples shown, the smooth, shallow V-profile at the sinus junction of the two semi-cells (see image 2) appears to be a more common feature consistent with C. regnellii.

  • A water sample was taken on 08/10/2022 from pond-edge using a 10µ dip net to enrich for microbes. Air temp. 82°F.

Photos / Sounds

Observer

roman_romanov

Date

August 17, 2022 07:58 PM MSK

Photos / Sounds

Observer

mnold1

Date

July 25, 2022 07:27 PM EDT

Description

Mag. 400x
Algal epiphytes inhabiting the surface of a very large diatom. (Green minions!) Possible genera: Colacium or Characium?

  • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 07/16/2022 using a 10µ dip net to enrich for microbes. Air temp. 79°F.

Photos / Sounds

Observer

mnold1

Date

July 16, 2022 08:22 PM EDT

Description

Mag. 400x
Long, thin, linear Closterium; 230µ x 6-7µ; L/W is minimally 32.8, maximally 38.3. C. idiosporum is also a possible ID, but I favor C. pronum for its very thin, spindle shape. Note the central nucleus is easily seen in this specimen. For reference images and information see http://www.digicodes.info/Closterium_pronum.html#2011045005 and http://protist.i.hosei.ac.jp/PDB/Images/Chlorophyta/Closterium/pronum/sp_37c.html.

  • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 07/16/2022 using a 10µ dip net to enrich for microbes. Air temp. 79°F.

Photos / Sounds

Observer

mnold1

Date

July 16, 2022 09:38 PM EDT

Description

Mag. 400x
As seen here https://diatoms.org/species/pinnularia_formica.

  • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 07/16/2022 using a 10µ dip net to enrich for microbes. Air temp. 79°F.

Photos / Sounds

Observer

mnold1

Date

June 30, 2022 04:44 PM EDT

Description

mag. 400x
World's largest known freshwater bacterium (a chemolithotroph)! Large intracellular spheres are CaCO3 crystals and the much smaller spheres (best visible in the lower panel) are sulfur droplets, see https://www.nature.com/articles/s41467-017-00342-9.

  • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 06/30/2022 using a 10µ dip net to enrich for microbes. Air temp. 81°F.

Photos / Sounds

Observer

mnold1

Date

June 20, 2022 08:17 PM EDT

Description

Mag. 400x (1-5), 100x (6)
First image is a composite. Gorgeous specimen! Reference images here http://www.digicodes.info/Micrasterias_compereana.html#2012018002 and https://www.desmids.nl/Desmidiokogical%20Notices/Desmidiological_Notices_1-december_2018.pdf (page 7)

  • A pond-side water sample was taken on 06/10/2022 using a 10µ dip net to enrich for microbes. Air temp. 76°F.

Photos / Sounds

What

Rotifers (Phylum Rotifera)

Observer

mnold1

Date

April 16, 2021 01:34 PM EDT

Description

A fun imagining, but entirely unsupported (see bdstaylor below); The Imagining:
Seems to my eyes that the vampyrellid (with red eye spot) has inserted spines into the Mougeotia cell and is beginning to suck out the chloroplast plasma. (note the depletion of green color at the point of spine insertion and also on the opposite side of the chloroplast.) Am I interpreting these events correctly?
A pond-edge water sample was collected on 4/8/2021 using a 10 micron dip net to enrich for microorganisms. Air temp. 65F

Photos / Sounds

Observer

mnold1

Date

June 30, 2022 06:30 PM EDT

Description

Mag. 100x (1,5), 400x (2,3,4,5)
Image 1 - axopods snag a dark ciliate that is filled with zoochlorella (opaque mass in upper right quadrant). Images 2 and 3 highlight the multiple nuclei (as seen here https://arcella.nl/actinosphaerium-eichhornii/) and axopods respectively. Images 4 and 5 document lunch past and present (past: Lepadella sp. rotifer in older food vacuole, similar to https://www.plingfactory.de/Science/Atlas/KennkartenTiere/Rotifers/01RotEng/source/Lepadella%20ovalis.html) and the recently snagged ciliate being engulfed during this observation session.

  • After gently pushing aside the cover of lily pads, a pond side water sample was taken on 06/30/2022 using a 10µ dip net to enrich for microbes. Air temp. 81°F.

Photos / Sounds

Observer

mnold1

Date

February 17, 2022 04:06 PM EST

Description

Mag. 400x
Replication imminent? (image 2)

  • 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.

Photos / Sounds

Observer

woodillj

Date

April 14, 2021 12:37 PM PDT

Description

  • in freshwater pond sample
  • objective(s) (x 10): 600x
  • approximate length: 25 µm

Photos / Sounds

Observer

jane_trembath

Date

March 31, 2012 12:34 PM SAST

Photos / Sounds

Observer

mnold1

Date

June 20, 2022 09:21 PM EDT

Description

Mag. 400x
Euplotes-like ciliate?

  • A pond-side water sample was taken on 06/10/2022 using a 10µ dip net to enrich for microbes. Air temp. 76°F.

Photos / Sounds

What

Western Eyed Click Beetle (Alaus melanops)

Observer

jdmanthey

Date

June 9, 2022 12:52 PM PDT

Photos / Sounds

Observer

mnold1

Date

August 10, 2021 12:45 PM EDT

Description

Mag. 400x
For comparison, see https://en.wikipedia.org/wiki/Merismopedia.
A shoreline water sample was taken on 8/9/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

shanesmicroscope

Date

June 2022

Photos / Sounds

Observer

mnold1

Date

June 12, 2022 06:14 PM EDT

Description

Mag. 400x
All images of the same colony. No flagella or mucilage sheath. Not certain about the ID. (Perhaps C. microsporum?)

  • A pond-side water sample was taken on 06/10/2022 using a 10µ dip net to enrich for microbes. Air temp. 76°F.

Photos / Sounds

Observer

mnold1

Date

September 10, 2021 10:39 PM EDT

Description

Mag. 400x
For comparison see http://www.digicodes.info/Micrasterias_furcata.html#2014039005.
A pond edge water sample (freshwater) was taken on 9/10/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

mnold1

Date

November 10, 2021 06:38 PM EST

Description

Mag. 400x
From one of the main tidal channels of the salt marsh, a water sample was taken on 11/10/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

bdstaylor

Date

September 11, 2021 03:06 PM EDT

Description

L. fusca resembles L. spirogyroides, but has pellicular ornaments resembling truncated pyramids. Length 170 μm, including tail spike.

Photos / Sounds

What

Burrowing Wolf Spiders (Genus Geolycosa)

Observer

catherine_g

Date

June 4, 2022 10:32 AM CDT

Photos / Sounds

What

Margined Ram's-Horn (Planorbis planorbis)

Observer

roman_romanov

Date

June 1, 2022 11:46 PM MSK

Photos / Sounds

Observer

zookanthos

Date

May 26, 2022

Photos / Sounds

Observer

mnold1

Date

September 11, 2021 12:23 AM EDT

Description

Mag. 100x (1) , 400x (2-4)
Made the ID based on the large size (200µ) and visual similarity with images here https://www.arcella.nl/centropyxis-discoides/.
A pond edge water sample (freshwater) was taken on 9/10/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

zookanthos

Date

November 25, 2019

Description

Anterior flagellum appears to beat with a sine-wave motion, posterior flagellum stays mostly straight. Reminds me most of Anisonema, but I don't think that's what this is.

Photos / Sounds

Observer

hanly

Date

April 30, 2022 08:05 AM EDT

Photos / Sounds

Observer

bdstaylor

Date

May 5, 2022 01:47 PM EDT

Description

This species doesn't have a name, yet. It is a new and undescribed amoeba. So far, it has only been recorded at one location, a rain-fed bog lake in Ottawa. The shell is usually six-sided, with a flat top and nearly perpendicular sides. It has a ruffled (crenulated) aperture. They are usually found in floating mats of filamentous algae.

Sixth image is a stack that didn't work as well as I'd hoped.

Photos / Sounds

What

Blue Grosbeak (Passerina caerulea)

Observer

jdmanthey

Date

May 7, 2022 08:31 AM CDT

Photos / Sounds

Observer

lcapurro

Date

May 2022

Place

Uruguay (Google, OSM)

Photos / Sounds

Observer

mnold1

Date

April 22, 2022 09:55 PM EDT

Description

Mag. 400x
This specimen is NOT populated with symbiotic algae (thus the absence of green coloration). The arrows in the first composite photo indicate the long (black) and short (red) populations of bifurcated spines. The long spines have a deeper fork than expected and may indicate this is a variant of A. turfacea or a different species. (https://arcella.nl/acanthocystis-turfacea/)

  • A water and moss sample was taken from a partly submerged boulder from a location within the Lee Brook watershed. Air temp. 68F

Photos / Sounds

Observer

mnold1

Date

April 2, 2022 09:30 PM EDT

Description

Mag. 400x
As seen here https://arcella.nl/actinophrys-sol/. In image 2 (composite) the left panel shows a large contractile vacuole, at the cell surface, that is about to burst. The right panel show remnants of the same vacuole immediately after bursting. The vacuole then quickly regenerated. This sequence is captured in the attached video (and was repeated continually, giving the vacuole the appearance of little engine). -https://youtu.be/h9yUcYSc16Q - My understanding is that A. sol is managing osmotic balance by expelling water with this contractile vacuole.

  • On 3/29/2022 a water and moss sample were taken from the submerged section of a boulder in the Billings-Avery Brook. Air temp. 38F

Photos / Sounds

Observer

bdstaylor

Date

April 9, 2022 09:51 AM EDT

Description

From a pond with residual snow and ice, similar to the habitat in which Foissner collected the type species Wallackia schiffmanni. Oral structures are in the "Gonostomum pattern," inwardly displaced CV at bottom of AZM, very long and widely space caudal cirri, 2-nodule macronucleus. Ventral cirri were observed in vivo, as 2 long rows. Photographic records of the genus are extremely scarce.

Photos / Sounds

What

Sac Fungi (Phylum Ascomycota)

Observer

mnold1

Date

April 2, 2022 10:39 PM EDT

Description

Mag. 400x
Large, tetrahedral, asexual ascospore of an aquatic hyphomycetes fungi (known collectively as Ingoldian fungi). Compare the current specimen with a smaller example from a previous observation, https://www.inaturalist.org/observations/105817766. These are often involved in leaf litter decomposition. Using Oliver Kim's (MicrobeHunter) video about "focus stacking" and the free software described, Picolay, I performed my first stacking experiment https://www.youtube.com/watch?v=4reipg9LV8M. Image 1 is a stacked image. Image 2 is a composite of the 6 photos that were focus-stacked, using Picolay, to create the first image. Considering that the focal planes represented by the 6 contributing photographs are too widely spaced (i.e, truly need more intervening images), the result is impressive. I hope to play with Picolay again soon!.

  • On 3/29/2022 a water and moss sample were taken from the submerged section of a boulder in the Billings-Avery Brook. Air temp. 38F

Photos / Sounds

Observer

sarah211

Date

February 12, 2022 09:51 PM EST

Description

From a large vernal pool. 40x magnification. Very active and swimming strongly.

Fungi

Photos / Sounds

What

Fungi Including Lichens (Kingdom Fungi)

Observer

mnold1

Date

March 2022

Description

Black, spiky fruiting bodies (like beard stubble), about 1-2mm long, were found on a dead, fallen branch. The spikes were stiff and prickly when handled. The spikes protruded through tiny fissures in the bark and were distributed in clusters over the entire ~60cm (~2') branch. The spikes were present on "bare" bark and also growing through lichen colonies (as seen in photos 1 & 2, where they protrude through a colony of Star Rosette Lichen). Far less frequent than the spikes were small, black, flat-topped, mushroom-shaped bodies, looking like tiny nails driven into minute fissures in the bark (esp. photos 6-9). Their caps or heads were only 0.5 to 1mm in diameter. (I noticed them only in the photo enlargements.) It is my assumption that these structures are related to the spikes. This fungus looks similar to images of Caliciopsis (e.g. Pine Canker, however, I don't know if this branch came from a White Pine that is within about 10 meters of the drop location, or from one of the other nearby trees (including oaks, Big Tooth Aspen, Black Cherry, and Red Cedar).

Photos / Sounds

Observer

mnold1

Date

March 15, 2022 09:08 PM EDT

Description

Mag. 400x
Hyaline test as seen here https://www.arcella.nl/gibbocarina/ - perhaps G. galeata

  • A bog water sample was taken on 3/15/2022 using a turkey baster swished among the submerged stems of sphagnum moss. (The area sampled was ~circular, only 15' across, and was dominated by sphagnum. Large trees and shrubs shaded the area; a small brook flowed from the circular impoundment.) Air temp. 50F

Photos / Sounds

Observer

mnold1

Date

March 15, 2022 08:23 PM EDT

Description

Mag. 400x
Not sure about the ID. This specimen has more spine-bearing scales approaching the aperture than other specimens I've encountered. However, this is the first specimen I've of presumptive E. acanthophora obtained from a truly boggy environment.

  • A bog water sample was taken on 3/15/2022 using a turkey baster swished among the submerged stems of sphagnum moss. (The area sampled was ~circular, only 15' across, and was dominated by sphagnum. Large trees and shrubs shaded the area; a small brook flowed from the circular impoundment.) Air temp. 50F

Photos / Sounds

Observer

mnold1

Date

March 9, 2022 04:12 PM EST

Description

Mag. 400x
P. lata. Valve view of a relatively long, wide Pinnularia (140µ x 45µ). The striae are broad and widely spaced (only 2-3 striae in 10µ). This specimen is marginally larger than the range specified for P. lata recorded here, but the images are very similar https://diatoms.org/species/pinnularia_lata. Also see the diagram here http://cfb.unh.edu/phycokey/Choices/Bacillariophyceae/Pennate/biraphes/biraphe_unicells/biraphe_unicells_symmetric/PINNULARIA/Pinnularia_Image_page.html.

  • A pond edge water sample (freshwater) was taken on 3/6/2022 using a 10 micron dip net to enrich for microorganisms. Air temp. 41C. Sampling area was at the inflow of a small brook that feeds the pond and was ice-free. The pond was predominantly ice covered.

Photos / Sounds

Observer

cocokitty

Date

March 12, 2022 09:10 PM EST

Photos / Sounds

Observer

mnold1

Date

March 9, 2022 05:59 PM EST

Description

Mag. 400x
3 specimens were photograph, each presented in a different image or image composite; I'm assuming they were all the same species. All were essentially oval and ranged 60-70µ in length. All had a large oral cavity (but not the huge cleft of Lembadion?). The oral cavity appears to contain an oral sail (like Pleuronema) that waves about, (best seen in the video), though I could not detect any movement of a sail beyond the bounds of the oral cavity. There appear to be 2 types of cilia, both of the same thickness: long (few) and short (many). These are easily seen in the first image. In the 3rd composite image (depicting the the smallest of the three specimens) the photo sequence records the opening of the oral cavity from a closed state ... very cool! I wish I caught the mouth opening on video, but it's still fun to view: https://youtu.be/JgQ9JYRjFBw

  • A pond edge water sample (freshwater) was taken on 3/6/2022 using a 10 micron dip net to enrich for microorganisms. Air temp. 41C. Sampling area was at the inflow of a small brook that feeds the pond and was ice-free. The pond was predominantly ice covered.

Photos / Sounds

What

Vorticellidae (Family Vorticellidae)

Observer

laneallen

Date

July 7, 2019 11:19 AM CDT

Description

Scale bar = 10µm
If you look closely you can see particles being sucked in and expelled by this little creature.

Photos / Sounds

Observer

kenkneidel

Date

February 19, 2022

Description

first photo 47 microns, chain in second photo 396

Photos / Sounds

Observer

jjlisowski

Date

February 21, 2022 11:27 AM EST

Photos / Sounds

What

Stentor (Genus Stentor)

Observer

mnold1

Date

February 17, 2022 06:31 PM EST

Description

Mag. 100x (1), 400x (2,3)
Colorless Stentor with a moniliform (string of beads) macronucleus. S. coeruleus is a possible ID.See http://protist.i.hosei.ac.jp/PDB/Images/Ciliophora/Stentor/coeruleus/index.html for corroborating images.

  • 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.

Photos / Sounds

Observer

mnold1

Date

February 17, 2022 05:52 PM EST

Description

Mag. 400x
What is this?! A flagellate with a test!? I need help with this one! Go here for a video. (Best run at slow speed, because I could not keep up with this critter.) https://youtu.be/pC2afUUEHG0

  • 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.

Photos / Sounds

Observer

mnold1

Date

February 9, 2022 04:31 PM EST

Description

Mag. 400x
As seen here http://www.digicodes.info/Closterium_rectimarginatum_fo.html#2012089037 and http://protist.i.hosei.ac.jp/PDB/Images/Chlorophyta/Closterium/rectimarginatum/sp_03.html. This taxon was also oberved at a different waterbody in our town https://www.inaturalist.org/observations/86338051.

  • 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.

Photos / Sounds

Observer

mnold1

Date

December 27, 2021 05:31 PM EST

Description

mag. 400x
I think this is an early stage or late (degrading) stage of Actinosphaerium development. The axopods (1), and large vacuoles (2), and streaming ectoplasm surrounding the vacuoles, are all characteristics of Actinosphaerium... just sparsely represented. Actinosphaerium-lite or a flyweight division contender. A video of this specimen is found here: https://youtu.be/oXElITiowuk
(video description: Large, multi-vacuole Actinosphaerium (250 - 850 µm) were common in the 12/27/2021 water sample. This specimen retains representative features of Actinosphaerium, though very few in number. It has only one axopod (internally supported by microtubules, stiff; unlike the lobose and filose pseudopodia); it has only 2 large vacuoles (vs many vacuoles stacked in concentric layers); it has an ectoplasm that seems to stream around surface of the vacuoles. I do not see a nucleus, but imagine there must be one here. 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.

Photos / Sounds

Observer

bert_raccoon

Date

August 9, 2020 11:30 PM EDT

Photos / Sounds

Observer

mnold1

Date

February 9, 2022 05:44 PM EST

Description

Mag. 400x (1-3), 100x (4)
Not sure of the ID. The specimen looks like a lateral branch from an absent central chain. Draparnaldia was previously found at this location https://www.inaturalist.org/observations/70262461.

  • 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.

Photos / Sounds

Observer

jameskdouch

Date

October 25, 2021 10:31 PM AEDT

Description

Bright-field light microscopy; medium-power. In pond.

Photos / Sounds

What

Yellow-ladle Liverwort (Scapania bolanderi)

Observer

trientalid

Date

February 9, 2022 11:04 AM PST

Photos / Sounds

Observer

bdstaylor

Date

April 6, 2020 08:40 PM EDT

Description

A ciliate that resembles an Easter egg. This one was found in a natural pond intermittently connected to the Gatineau river by a culvert.

The colourful cytoplasm consists mainly of food vacuoles containing cyanobacteria in various phases of digestion. The cytostome (cell mouth) is supported by a cytopharyngeal basket composed of stiff microtubular rods (at the anterior right, from cell's perspective). The cell has numerous spindle-shaped trichocysts, visible here as short black lines.

Photos / Sounds

Observer

mnold1

Date

August 28, 2021 10:45 PM EDT

Description

Mag. 400x
A shoreline water sample was taken on 8/26/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

juanloredo

Date

January 19, 2022 02:43 PM MST

Description

Water sample collected from a irrigation drain in Julimes, Chihuahua, at the indicated location.
The sample was collected on January 19th at 14:43. Images were collected next day,

Photos / Sounds

Observer

vulcanochloris

Date

December 7, 2021 09:26 PM UTC

Photos / Sounds

What

Suctoria (Subclass Suctoria)

Date

January 17, 2022 07:00 PM CST

Description

Amazing, whatever it is. From an intertidal sand sample.

Photos / Sounds

Observer

davidandjill123

Date

January 18, 2022 05:01 AM UTC

Description

Freshwater constructed wetland

Photos / Sounds

Observer

golfopolikayakl

Date

January 19, 2022 11:17 PM CET

Photos / Sounds

Date

November 11, 2018

Photos / Sounds

Observer

mnold1

Date

November 2, 2021 09:11 PM EDT

Description

Mag. 400x
A swamp edge water sample (freshwater) was taken on 11/2/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

davidandjill123

Date

January 14, 2022 04:20 AM UTC

Description

freshwater 26 deg C. constructed wetland.

Photos / Sounds

What

Euglenoids (Phylum Euglenozoa)

Observer

zookanthos

Date

April 26, 2020

Description

Seemed like the trailing flagellum was longer than the leading flagellum, but it is hard to be certain.

One of the flagella later got wrapped up around the cell and apparently stuck there, causing the cell to be unable to move.

Tags

Photos / Sounds

Observer

kenkneidel

Date

April 13, 2021

Description

193 microns

Photos / Sounds

Observer

mnold1

Date

June 15, 2021 10:56 PM EDT

Description

Mag. 400x photos 1,2
Mag. 100x photos 3, 4
Protective shell (Lorica) of a Keratella sp. rotifer.
A water sample was taken on 6/15/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

mnold1

Date

December 31, 2021 08:48 PM EST

Description

Mag 100x (1), 400x (2-3)
The Hungry Actinosphaerium. Lunch: a dozen or so Keratella rotifers and a nice, fat Bosmina water flea! It's clear how this ~850µ amoeboid maintains its bulk! More Actinosphaerids in the next 2 or 3 posts.

  • 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.

Photos / Sounds

Observer

mnold1

Date

December 31, 2021 07:32 PM EST

Description

Mag. 400x
As seen here: http://protist.i.hosei.ac.jp/PDB/Images/Heterokontophyta/Araphidineae/Tabellaria/fenestrata.html and http://nordicmicroalgae.org/taxon/tabellaria%20fenestrata.
The 2nd image marks an attempt at communication. I'm sure of it!

  • 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.

Photos / Sounds

Observer

shanesmicroscope

Date

January 2022

Description

Not a great observation in terms of image quality, but I discovered my hypotrichs and euplotids contained polarizing granules and wanted to take note.

Photos / Sounds

Observer

mnold1

Date

December 31, 2021 07:55 PM EST

Description

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.

Photos / Sounds

Observer

vicentefranch

Date

December 11, 2020 10:20 AM CET

Description

Varios ejemplares.
Pienso que la observación anterior https://www.inaturalist.org/observations/66042813 podría ser de la misma especie, aunque se ha encontrado en una lugar diferente.

Photos / Sounds

Observer

vicentefranch

Date

January 20, 2021 09:26 AM CET

Description

Salinity 6030 ppm

Photos / Sounds

Observer

mnold1

Date

December 31, 2021 07:45 PM EST

Description

Mag. 100x (1,2), 400x (3-5)
Amphileptus procerus (my top pick) or Litonotus cygnus (based on images and data found here http://www.wfoissner.at/data_prot/Foissner_Berger_1996_375-482large.pdf on pages 429 and 430. What do you think Bruce @bdstaylor?

  • 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.

Photos / Sounds

Observer

leptonia

Date

April 28, 2016 01:46 PM PDT

Photos / Sounds

Observer

brettjackson

Date

January 2, 2021 12:57 AM CST

Description

Quite tricky to identify; I believe this is a Pyrenula species spore. Pyrenula is the only genus I have seen that produces this multi-septate lozenge pattern ascospore.

Photos / Sounds

Observer

mnold1

Date

December 27, 2021 06:48 PM EST

Description

Mag. 100x (1), 400x (2-5)
Even at a whapping 250µ, this is the smallest Actinosphaerium sp. sampled from this location on 12/27/21. It has a large number of axopodia and so must be on the hunt. These organisms are multi-nucleate. Perhaps because of the smaller size of this specimen, the nuclei are more readily seen. In the last image I've labeled what I think are nuclei.

  • 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.

Photos / Sounds

Observer

mnold1

Date

December 31, 2021 06:58 PM EST

Description

Mag. 100x (1), 400x (2-4)
Very large amoeba with a hearty appetite; having ingested 2, large pennate diatoms (both Pinnularia?). Smaller diatoms and crystals are also visible in the streaming cytoplasm. Go here for 2 short videos at 100x and 400x: https://youtu.be/k1TUZVLZvEM and https://youtu.be/SZ-1WE9Dnpw.

  • 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.

Photos / Sounds

Observer

zookanthos

Date

March 9, 2021

Photos / Sounds

Observer

jane_trembath

Date

October 4, 2021 11:22 PM SAST

Photos / Sounds

Observer

mnold1

Date

June 15, 2021 08:27 PM EDT

Description

Mag. 400x
A water sample was taken on 6/15/2021 using a 10 micron dip net to enrich for microorganisms.

Photos / Sounds

Observer

mnold1

Date

January 3, 2022 03:13 PM EST

Description

Mag. 400
D. archeri?, though I'm confused by the presence of two cell types. The larger, cyst-like cells appear to be intimately associated with the colony, but do they derive from D. archeri (cysts for long term survival?) or are they parasitic or epiphytic cells exploiting the Diplophrys colony? I could not find a literature reference regarding the ability of D. archeri to form cysts.
The first 3 images provide a close-up view. Images 4 - 9 were taken periodically over a ~9 minute interval as the colony consolidated. The YouTube video spans this same time interval (5, ~15 second videos catenated in a single video): https://youtu.be/ZJ2OV10jLvU.

  • 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.

Photos / Sounds

Observer

chrisperslab

Date

May 3, 2021 05:50 PM UTC

Description

from bronx river 400x

Photos / Sounds

Observer

trientalid

Date

September 23, 2021 05:33 PM PDT

Photos / Sounds

Observer

johnboback

Date

November 26, 2021 08:33 PM EST

Description

Pond water collected at Deegan Lake on 27 Sept. 2021 and examined under the microscope at home on 26 Nov. 2021. The algae and vegetation in the collected pond water are decomposing.

Photos / Sounds

Observer

mnold1

Date

June 15, 2021 10:38 PM EDT

Description

Mag. 400x (photo 1 and video)
Mag. 100x (photo 3)
Close inspection reveals 2 flagella per cell, one long and one short (the shorter flagellum looks to be about 1/3 the length of the longer).
A water sample was taken on 6/15/2021 using a 10 micron dip net to enrich for microorganisms.