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Photos / Sounds

Observer

crseaquist

Date

March 23, 2024 11:23 AM CDT

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Here are some videos:
https://youtu.be/8DMTa0ZruLc
https://youtu.be/izC2XI3pRPY
https://youtu.be/1Q_9wdLj5pc

I think the videos seem to show it is an eruptive morphotype.

Photos / Sounds

Observer

crseaquist

Date

March 17, 2024 02:43 PM CDT

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 17, 2024 09:41 AM CDT

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 17, 2024 09:23 AM CDT

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

What

Opercularia (Ciliate) (Genus Opercularia)

Observer

crseaquist

Date

March 7, 2024 07:51 PM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

What

Opercularia (Ciliate) (Genus Opercularia)

Observer

crseaquist

Date

March 7, 2024 07:51 PM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

What

Nematodes (Phylum Nematoda)

Observer

crseaquist

Date

March 7, 2024 03:02 PM CST

Description

Pieces of leaves gathered from the ground and placed on petri dish.

Photos / Sounds

What

True Slime Molds (Class Myxomycetes)

Observer

crseaquist

Date

March 10, 2024 10:49 AM CDT

Description

A large mature sporangium formed from a large plasmodium in a petri dish. The second image shows individual spores after they were moved to a slide. Last image possibly shows germination, the beginning of the emergence of a haploid amoeba.

Photos / Sounds

Observer

crseaquist

Date

March 15, 2024 02:53 PM CDT

Description

Gathered dry leaves on 2024-02-23 and stored in water.
Two daughters emerging from a division cyst:

  1. Initial observation of cyst with another individual
  2. 2 minutes later
  3. 18 minutes later
  4. 77 minutes later
  5. 84 minutes later
  6. 140 minutes later
  7. 153 minutes later
  8. 154 minutes later 1st daughter emerges
  9. 155 minutes later
  10. 162 minutes later
  11. 163 minutes later 2nd daughter emerges
  12. 2nd daughter swims away

Video: https://youtu.be/vntikKDmSDE

Photos / Sounds

Observer

crseaquist

Date

March 1, 2024 07:08 AM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 2, 2024 07:05 AM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 2, 2024 06:44 AM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 2, 2024 05:05 PM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

March 2, 2024 05:05 PM CST

Description

Gathered dry leaves on 2024-02-23 and stored in water.

Photos / Sounds

Observer

crseaquist

Date

January 18, 2024 05:48 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-30 using a turkey baster.

Photos / Sounds

Observer

crseaquist

Date

February 10, 2024 03:04 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2024-01-28 using a turkey baster.

Photos / Sounds

Observer

crseaquist

Date

January 29, 2024 03:10 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2024-01-28 using a turkey baster.

Photos / Sounds

Observer

crseaquist

Date

January 24, 2024 02:57 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-30 using a turkey baster.
Gliding and swimming forms:
Length of cell: 40 µm
Width of cell: 12 µm
Length of flagellum: 120 µm

Here is a video showing the organism changing from stationary to gliding to swimming forms:
https://youtu.be/6rgXXILDj8I

See observation https://www.inaturalist.org/observations/198088142 which shows a stationary form where movement is exceedingly slow by “eruptive” lobopodia.

Recently this organism has been sequenced:

“Phylogenetic position of the pelobiont Mastigamoeba aspera and revision of the family Mastigamoebidae (Archamoebae, Pelobiontida)” by Ludmila V. Chistyakova, et. al. (see https://www.sciencedirect.com/science/article/abs/pii/S0932473923000743?via%3Dihub)

This work has resulted in changes to the taxonomy and the introduction of new subfamilies, etc.

Photos / Sounds

Observer

crseaquist

Date

January 23, 2024 02:57 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-30 using a turkey baster.

Flagellated amoeba crawling very slowly. (Mastigamoba, Type M. aspera Schulze 1875)
https://youtu.be/aYzgIXkhUx0

“Phylogenetic position of the pelobiont Mastigamoeba aspera and revision of the family Mastigamoebidae (Archamoebae, Pelobiontida)” by Ludmila V. Chistyakova, et. al. (see https://www.sciencedirect.com/science/article/abs/pii/S0932473923000743?via%3Dihub)

Photos / Sounds

Observer

crseaquist

Date

January 29, 2024 10:48 AM CST

Description

Water sample taken from the edge of a freshwater playa on 2024-01-28 using a turkey baster.
Length: 90 µm
Width: 45 µm
Trophi: 32 µm
Toes: 14 µm
Ratios: L/TL: 6.4

Two eyespots. Type C virgate trophi.

  1. Dorsal view shows the two eyespots and trophus.
  2. Lateral view showing toes.
  3. Another lateral view.
  4. Remainder of images show various views of the trophus.

Photos / Sounds

Observer

crseaquist

Date

January 3, 2024 06:31 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

The images show the flattened ovoid shape of the test with a lens like cross section. No rod like spines are visible. There do appear to be xenosomes. The third image seems to show a CV and nucleus. It seems to be between 30 and 40 microns long.

Videos:
https://youtu.be/rNY33wLxCXo
https://youtu.be/BZW5JillJPo

Photos / Sounds

Observer

crseaquist

Date

December 7, 2023 03:01 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

Photos / Sounds

Observer

crseaquist

Date

December 30, 2023 02:57 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

About 360 microns long.

Photos / Sounds

Observer

crseaquist

Date

December 7, 2023 03:01 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

Video: https://youtu.be/f22Nib6qYbg

Photos / Sounds

Observer

crseaquist

Date

January 1, 2024 03:01 PM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

From 1st image to last was about 25 minutes. Unfortunately I lost them when I tried to rehydrate the slide, so I never saw them actually separate.

Photos / Sounds

Observer

crseaquist

Date

April 13, 2023 11:53 AM CDT

Description

Water sample (freshwater) was taken on 2023-04-09 using a turkey baster.

Two different individuals in the same sample.

To me looks like Lens-like morphotype.

Photos / Sounds

Observer

crseaquist

Date

December 22, 2023 09:57 AM CST

Description

Water sample taken from the edge of a freshwater playa on 2023-12-07 using a turkey baster.

Appears to me to be Fan-shaped morphotype.

Here is a video of a similar individual in the same sample: https://youtu.be/gNJhlXhcj-M

Photos / Sounds

Observer

crseaquist

Date

November 25, 2023 11:56 AM CST

Description

Water sample taken from the edge of a stagnate freshwater playa on 2023-11-06 using a turkey baster.

i. Diameter: 133 µm
ii. Aperture: 59 µm
iii. Height: ? µm
iv. A/D: 0.44

Does image 4 really show so many nuclei?

What is image 5 showing?

Photos / Sounds

Observer

crseaquist

Date

November 25, 2023 10:42 AM CST

Description

Water sample taken from the edge of a stagnate freshwater playa on 2023-11-06 using a turkey baster.

Photos / Sounds

Observer

crseaquist

Date

November 25, 2023 09:33 AM CST

Description

Water sample taken from the edge of a stagnate freshwater playa on 2023-11-06 using a turkey baster.

i. Diameter: 155 µm
ii. Aperture: 56 µm
iii. Height: 49 µm
iv. A/D: 0.36

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