worm or ciliate?

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75RR
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worm or ciliate?

#1 Post by 75RR » Sun Dec 13, 2020 7:27 pm

Not sure what this is ... suggestions welcome

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Re: worm or ciliate?

#2 Post by micro » Sun Dec 13, 2020 8:47 pm

looks like a weird shaped hypotrich
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Re: worm or ciliate?

#3 Post by Plasmid » Sun Dec 13, 2020 8:50 pm

Cohnilembus pusillus since it has cirri on the tip or a species of Dileptus kind of hard to tell, which magnification was it observe with?

Found this image online of a Cohnilembus for comparison
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Re: worm or ciliate?

#4 Post by 75RR » Sun Dec 13, 2020 9:41 pm

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Thanks micro and Plasmid

Wonder if it might be Stichotricha sp

Adding single image:
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Re: worm or ciliate?

#5 Post by janvangastel » Mon Dec 14, 2020 8:29 am

It could be Stichotricha I think. I once found one that looks about similar, but often the details are more important then the overall looks https://www.youtube.com/watch?v=LSmVq-sUhb4 .
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Re: worm or ciliate?

#6 Post by 75RR » Mon Dec 14, 2020 9:10 am

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Thanks janvangastel

I think the spiral cilia are probably an important identifier - see drawing
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Re: worm or ciliate?

#7 Post by Bruce Taylor » Mon Dec 14, 2020 5:48 pm

I agree with Jan: it's a Stichotricha, cf. S. aculeata (Note that Kahl's pic of S. secunda in the above illustration is actually S. aculeata...he reversed the species, which has caused a lot of confusion over the years!)
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Re: worm or ciliate?

#8 Post by 75RR » Mon Dec 14, 2020 5:58 pm

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Thanks Bruce. Curiously to my mind at least, none of the photos of Stichotricha secunda nor Stichotricha aculeata quite match the drawings as much as my image does. :shock:
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Re: worm or ciliate?

#9 Post by Bruce Taylor » Mon Dec 14, 2020 7:27 pm

Yes, they do not usually look as long and twisty as your ciliate. :) A closely-related genus to consider is Chaetospira, which can look quite different when it happens to leave its lorica...as this one does, in the second half of the video: https://www.youtube.com/watch?v=ntRF0yNxRPk
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Re: worm or ciliate?

#10 Post by 75RR » Mon Dec 14, 2020 8:23 pm

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Thanks for the video - nicely detailed!
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