Page 1 of 1
ID these two foraging critters
Posted: Wed Feb 01, 2023 8:37 pm
by Bschnitzer
Platyhelminthes?
These two guys are about 150μ long. Whiskers at the mouth.
Thanks in advance.
Bob
- B0C5E0C4-88D1-4563-B12E-FF8B448258A4.jpeg (87.94 KiB) Viewed 1651 times
Re: ID these two foraging critters
Posted: Wed Feb 01, 2023 8:45 pm
by Bruce Taylor
They are ciliates....probably hypotrichs. Do you have any brightfield images? Dark field often does not show the features needed for ciliate identification.
Re: ID these two foraging critters
Posted: Wed Feb 01, 2023 9:03 pm
by Bschnitzer
Alas, no bright field on this one, Bruce. I only noticed longitudinal body striations and short sub anterior cilia scooping up food. Moved like a flatworm. They never rested, so it was difficult to get a sharp photograph.
Re: ID these two foraging critters
Posted: Wed Feb 01, 2023 10:46 pm
by Bschnitzer
I am processing a bright field video and will post later. This superb Charles Krebs image is the best match I can find. Certainly Hypotrich. Thanks again, Bruce.
- 9E1C6DDA-3CA2-456C-B40C-A9F536E0259C.jpeg (198.82 KiB) Viewed 1611 times
Re: ID these two foraging critters
Posted: Thu Feb 02, 2023 1:46 am
by Bschnitzer
Here is a bright field image at 100x and cropped to about 200x:
- 8EAA9B10-5B67-4313-96F7-1C02E7ECE57B.jpeg (108.43 KiB) Viewed 1602 times
Original higher resolution image:
https://drive.google.com/file/d/1H8ILMU ... sp=sharing
Here is the video:
https://drive.google.com/file/d/1xAi6rr ... sp=sharing
Re: ID these two foraging critters
Posted: Thu Feb 02, 2023 10:45 am
by Javier
That is an Hypotrich for sure.
Re: ID these two foraging critters
Posted: Thu Feb 02, 2023 10:06 pm
by Bruce Taylor
Yes, a hypotrich. To identify it below subclass, we'd need to see the distribution of cirri on the ventral surface. It resembles Urostyla, but there are other possibilities.
Re: ID these two foraging critters
Posted: Tue Feb 07, 2023 2:02 am
by Bschnitzer
Bruce,
Re: ventral cilia distribution, are you referring to the amphisiellid median cirral row and adoral zone of membranelle cilia only, or other cilia groupings along the ventral side? If I run across these guys again, I’ll pay more attention to that area, though I don’t think my setup will be up to the task, photo resolution-wise. Thanks again for the help.