bdstaylor's Identifications

Magnification of photos: 600×, 600×, 600×, 600×, 400×, 400×, 400×
Habitat: water and floating plant matter (such as Lemna sp.) collected from a swamp. There was a layer of ice about half an inch (~1 cm) thick, which I cracked with a stick to access the water.
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV at 600× is 100 µm.

Magnification of all photos: 600×
Habitat: organic debris and decaying leaf matter from a freshwater pond. This one was observed four days after collection.
Photo taken with a Celestron PentaView Digital Microscope. According to their website, the FOV (i.e. the diagonal width) at 600× is 100 µm.

Video: https://youtu.be/-g9aOLhXyn8

Photos are snapshots of the same individual in the video.

Size: 130 µm x 33 µm

Site of collection: Pavilion, Katsurashima Ryokuchi north pond (a freshwater habitat), Sendai, Japan

Date of collection: April 29th 2021

Weather: Rainy

Water temp.: 15.1°C

pH 6.5

Date of observation: May 9th 2021 (the collected sample in a plastic container was left near a window out of direct sunlight at room temperature until observation)

Bright field observation using a Wraymer microscope (model BX-3500TL, Osaka, Japan) equipped with a Floyd-2 HDMI ethernet digital camera (Wraymer, Osaka, Japan). The accuracy of the scale bar was confirmed by using a stage micrometer glass slide (1 div. = 10 µm; Wraymer, Osaka, Japan) at each magnification.