Search found 362 matches

by Bruce Taylor
Sun Sep 20, 2020 2:08 am
Forum: Identification help
Topic: NO idea
Replies: 1
Views: 32

Re: NO idea

A larval midge, I think (Chironomidae). :)
by Bruce Taylor
Fri Sep 18, 2020 2:23 pm
Forum: Pictures and Videos
Topic: Frontonia?
Replies: 5
Views: 61

Re: Frontonia?

A very clear and beautiful video! :) You were on the right track with Nassula. This is a species of Furgasonia.
by Bruce Taylor
Mon Sep 14, 2020 6:11 pm
Forum: Pictures and Videos
Topic: Freshwater Dinoflagellates
Replies: 9
Views: 214

Re: Freshwater Dinoflagellates

A really pretty video!
by Bruce Taylor
Mon Sep 14, 2020 6:07 pm
Forum: Identification help
Topic: Rectangular ciliates?
Replies: 5
Views: 102

Re: Rectangular ciliates?

Yes, they're sessile peritrichs. :) They don't seem to have a posterior wreath of cilia, so these are not fully-formed telotrochs. However, the cylindrical shape of the cell suggests that they've begun transforming into true telotrochs. Since they have lost their stalks already, we can't identify th...
by Bruce Taylor
Mon Sep 14, 2020 5:58 pm
Forum: Pictures and Videos
Topic: Litonotus lamella
Replies: 2
Views: 65

Re: Litonotus lamella

Very nice! :) In their paper on Microthorax pusillus, Leitner & Foissner mention that that species tends to appear in company with Litonotus lamella, Dexiotricha and Cinetochilum margaritaceum (all of which you have recorded, recently).
by Bruce Taylor
Mon Sep 14, 2020 5:45 pm
Forum: Pictures and Videos
Topic: Small stalked organisms
Replies: 2
Views: 68

Re: Small stalked organisms

Nice find! The little stalks guys are peritrich ciliates, probably in the genus Opercularia.
by Bruce Taylor
Sat Sep 12, 2020 3:02 pm
Forum: Identification help
Topic: Flagellate with odd movement
Replies: 6
Views: 143

Re: Flagellate with odd movement

Fascinating creatures. :) Colorless uniflagellate euglenoids like these were traditionally placed in the genus Astasia . Certain members of that genus are now known to be very closely related to the photosynthetic Euglena . Indeed, Astasia longa is now formally known as Euglena longa ...while others...
by Bruce Taylor
Sat Sep 12, 2020 1:19 pm
Forum: Pictures and Videos
Topic: Dexiotricha granulosa
Replies: 1
Views: 64

Re: Dexiotricha granulosa

Excellent! :)
by Bruce Taylor
Fri Sep 11, 2020 11:52 am
Forum: Pictures and Videos
Topic: Hypotrichia Vulpinarius
Replies: 7
Views: 175

Re: Hypotrichia Vulpinarius

Good one. :lol:
by Bruce Taylor
Fri Sep 11, 2020 11:48 am
Forum: Pictures and Videos
Topic: Microthorax pusillus
Replies: 2
Views: 80

Re: Microthorax pusillus

A very clear record, unmistakeably Microthorax. :) M. pusillus is common and plausible, but identification to species is difficult. There are many named species of Microthorax, including some near lookalikes, such as M. transversus and M. australis.
by Bruce Taylor
Wed Sep 09, 2020 5:41 pm
Forum: Identification help
Topic: Is this a Hypotrich?
Replies: 1
Views: 89

Re: Is this a Hypotrich?

Nice big ciliate. :) Yes, it's a hypotrich (i.e. it's in subclass Hypotrichia...it's customary to use lower case for the adjectival form, upper for formal name). Without seeing somatic ciliation and undulating membranes there is no way to put it in a lower taxon. It could be an oxytrichid (e.g. Cyrt...
by Bruce Taylor
Wed Sep 09, 2020 12:22 pm
Forum: Identification help
Topic: Elongated ciliate
Replies: 10
Views: 327

Re: Elongated ciliate

That guy really plumps up when he's squashed. :D
by Bruce Taylor
Wed Sep 09, 2020 11:24 am
Forum: Pictures and Videos
Topic: Flagellate: Goniomonas
Replies: 4
Views: 143

Re: Flagellate: Goniomonas

A terrific record of an interesting flagellate! Goniomonas , certainly. The "reflecting particles" in that black line are ejectisomes--tiny weapons that fire proteinaceous strings for defense and/or predation. All cryptomonads have them. :) Differentiating species of Goniomonas by light microscopy i...
by Bruce Taylor
Tue Sep 08, 2020 1:15 pm
Forum: Identification help
Topic: Question about the D.J. Patterson key
Replies: 2
Views: 156

Re: Question about the D.J. Patterson key

You've chosen a very good introductory book. David "Paddy" Patterson is a major figure in protist taxonomy (now retired, but still helping amateur microscopists on iNaturalist and the Facebook microscopy page), and his book was ahead of its time in providing good microphotographs of the organisms de...
by Bruce Taylor
Mon Sep 07, 2020 7:05 pm
Forum: Identification help
Topic: Elongated ciliate
Replies: 10
Views: 327

Re: Elongated ciliate

Spirostomum teres. :)
by Bruce Taylor
Mon Sep 07, 2020 6:32 pm
Forum: Pictures and Videos
Topic: Chilodonella unicinata
Replies: 7
Views: 217

Re: Chilodonella unicinata

Oh, that's much clearer. :) We see right away that the ventral surface is largely unciliated in the central area. That rules out some common cyrtophorians, such as Trithigmostoma . We see an unbroken preoral suture (that little "horizontal" line just forward of the mouth opening), so we can rule out...
by Bruce Taylor
Mon Sep 07, 2020 11:04 am
Forum: Identification help
Topic: Elongated ciliate
Replies: 10
Views: 327

Re: Elongated ciliate

Aha, another clue! :D If it contracted quickly and dramatically in response to sudden movements, then we can probably rule out Pseudoblepharisma . That genus is not particularly contractile, which throws suspicion back upon Spirostomum . It might be a Spirostomum that has recently divided, and not y...
by Bruce Taylor
Sun Sep 06, 2020 8:09 pm
Forum: Pictures and Videos
Topic: Chilodonella unicinata
Replies: 7
Views: 217

Re: Chilodonella unicinata

Cute little guy. :) A chlamydodontid for sure, and probably a chilodonellid. Chilodonella is certainly one of the suspects, but cell shape and the existence of a cyrtos are not really enough for a reliable genus ID...you'd want to see details that are missing here (ventral ciliation, shape of suture...
by Bruce Taylor
Sun Sep 06, 2020 7:54 pm
Forum: Pictures and Videos
Topic: Oxytricha?
Replies: 2
Views: 130

Re: Oxytricha?

Nice! :) Frontal/Ventral/Transverse (FVT) cirri indicate a member of the family Oxytrichidae (count is difficult, but you can be pretty sure there are 18 in all!). Left and right marginal cirri encircle the cell, meeting or overlapping at the posterior, and we are unable to determine whether caudal ...
by Bruce Taylor
Sun Sep 06, 2020 7:15 pm
Forum: Identification help
Topic: Elongated ciliate
Replies: 10
Views: 327

Re: Elongated ciliate

It's clearly a heterotrich, so definitely not Geleia or Tracheloraphis . Freshwater or salt? Anigsteinia & Gruberia are marine genera. If this was found in freshwater, my first suspicion would be Pseudoblepharisma . If it's a Spirostomum , it's not a mature specimen (body proportions are wrong, and ...
by Bruce Taylor
Wed Sep 02, 2020 4:03 pm
Forum: Pictures and Videos
Topic: Holosticha pullaster?
Replies: 2
Views: 79

Re: Holosticha pullaster?

Yes, H. pullaster. :) It's one of the few hypotrichs that can be identified even without seeing the ventral cirri, because of the trailing transverse cirri and that oddly placed CV. You've done a great job of showing the 2 central rows anyway (the "zigzag" files, or midventral complex, typical of ur...
by Bruce Taylor
Wed Sep 02, 2020 1:16 pm
Forum: Pictures and Videos
Topic: Programmed nuclear death in Paramecium
Replies: 17
Views: 498

Re: Programmed nuclear death in Paramecium

This is absolutely gorgeous! Such a clear record of the post-conjugal cell, after the old macronucleus disintegrates and before the final series of divisions. I think some of the smaller fragments might include recently divided micronuclei (the post-conjugal synkaryon, which undergoes a few mitoses ...
by Bruce Taylor
Wed Sep 02, 2020 12:58 pm
Forum: Pictures and Videos
Topic: Lacrymario olor showing off its flexible neck
Replies: 4
Views: 116

Re: Lacrymario olor showing off its flexible neck

Nice footage of Ol' Stretchy! :)
by Bruce Taylor
Tue Sep 01, 2020 3:39 pm
Forum: Pictures and Videos
Topic: Gruberia lanceolata Ciliate (ID-help Bruce Taylor)
Replies: 11
Views: 364

Re: Gruberia lanceolata Ciliate (ID-help Bruce Taylor)

DonSchaeffer wrote:
Tue Sep 01, 2020 3:02 pm
It must be a larva.
It's a full-grown one-eyed crustacean called a copepod. :)
by Bruce Taylor
Tue Sep 01, 2020 12:22 pm
Forum: Pictures and Videos
Topic: Philasterides armatus
Replies: 2
Views: 97

Re: Philasterides armatus

I have really been enjoying your ciliate observations, Jan. :) The long caudal cilium is a feature common to most members of the subclass Scuticociliatia. If you see a small ciliate with that trait, it is very likely to be a scuticociliate. In this case, it helps steer us away from the rather simila...
by Bruce Taylor
Mon Aug 31, 2020 4:59 pm
Forum: Pictures and Videos
Topic: Stylonychia
Replies: 4
Views: 114

Re: Stylonychia

I forgot that Stylonychia is Tetmemena now. Not all Stylonychia have been moved to Tetmemena ! I'm sorry if I gave that impression. Only certain species have been moved, such as T. pustulata , T. vorax and a few more. Other traditional species, such as members of the Stylonychia mytilus complex, re...
by Bruce Taylor
Mon Aug 31, 2020 11:37 am
Forum: Pictures and Videos
Topic: Stylonychia
Replies: 4
Views: 114

Re: Stylonychia

Beautiful! :) This is a species of Tetmemena...most likely, the very common Tetmemena pustulata.
by Bruce Taylor
Sun Aug 30, 2020 12:59 pm
Forum: Pictures and Videos
Topic: Ciliates: Uronema
Replies: 2
Views: 293

Re: Ciliates: Uronema

Very nice! :) The accompanying creatures are cryptophytes ( Cryptomonas , Chilomonas etc.). Their flagella are not resolved clearly, but we do see the distinctive extrusomes that line the gullet. I usually don't try very hard to identify small ovoid scuticociliates like Sathrophilus and Uronema , be...
by Bruce Taylor
Sun Aug 30, 2020 11:28 am
Forum: Identification help
Topic: Fanworm-like ciliate(?). Need help with species, please.
Replies: 6
Views: 532

Re: Fanworm-like ciliate(?). Need help with species, please.

I do NOT notice a peristomal lip that I see in the images online of Opercularia The lack of a distinct lip at the anterior of the cell is a handy feature that can be used to differentiate Opercularia from Epistylis (which always has a lip, but only in the non-contracted state). Most operculariids a...
by Bruce Taylor
Sat Aug 29, 2020 12:03 pm
Forum: Pictures and Videos
Topic: The best Camera for Photomicrography
Replies: 24
Views: 1068

Re: The best Camera for Photomicrography

Great article, Rob! A real labor of love.