Search found 354 matches

by BJ
Thu Jul 06, 2023 4:41 am
Forum: Photography Through the Microscope
Topic: Help with identification - suctorian or desmid zygospore
Replies: 1
Views: 485

Re: Help with identification - suctorian or desmid zygospore

Hi Robin,
I fancy the pseudoheliozoan Hedriocystis pellucida for this:

https://arcella.nl/hedriocystis-pellucida/

nice find,

BrianO
by BJ
Wed Dec 08, 2021 2:20 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: fossil sponge...coral...or what?
Replies: 6
Views: 1074

Re: fossil sponge...coral...or what?

Hi,

my impression is that it might be part of a decapod carapace. The colour and preservation suggest to me that it is not that old - say Holocene (recent) or Pleistocene (ice age) . Mr G++gle suggests that there are freshwater Pleistocene deposits in the Huntington area.

BrianO
by BJ
Wed Oct 20, 2021 9:51 am
Forum: General Discussion Forum and Community Announcements
Topic: zoom talk for beginners in macrophotograhy
Replies: 0
Views: 1261

zoom talk for beginners in macrophotograhy

Hello Team, it is a very very long time since I have posted ("real" life intruded) but I still get great enjoyment from the wonderful images to be found here - thank you all! I was recently asked if I knew anyone who could give a zoom talk / demonstration for beginners about starting out in macropho...
by BJ
Sat Dec 21, 2019 6:43 am
Forum: Photography Through the Microscope
Topic: Dirty snow
Replies: 6
Views: 2620

hi,

long time since I posted but too interesting a topic.....

I think that the long serrated objects are phytoliths and perhaps derived from cereals eg corn.

boa sorte

Brian
by BJ
Tue Oct 02, 2018 9:56 am
Forum: Photography Through the Microscope
Topic: Lichen Placopsis gelida
Replies: 15
Views: 4778

Ralf,

as usual great images. Your series of lichen photos are always superb.

Thank you for posting,

regards,

brianO
by BJ
Mon Oct 31, 2016 7:44 am
Forum: General Discussion Forum and Community Announcements
Topic: Resource detailing diatom collection sites
Replies: 3
Views: 1804

hi,

i am not sure whether you have to join the group to access the files, but Steve Gill has made available to the yahoo diatom group a very comprehensive list of diatomite sites:

https://groups.yahoo.com/neo/groups/dia ... Diatomite/


enjoy!

Brian
by BJ
Fri Jan 29, 2016 1:45 pm
Forum: Photography Through the Microscope
Topic: Nuphar advena (water lily)
Replies: 10
Views: 1926

hi, it is nice when everyone is right ! bernhardinho is right they are trichomes....in this case 'trichosclereids', but tsavorite is right as well in that the rough granular texture of the trichomes is due to encrusting calcium oxalate crystals. See here for example: http://reviste.ubbcluj.ro/contri...
by BJ
Thu Jan 21, 2016 8:26 am
Forum: Photography Through the Microscope
Topic: obscure North Sea diatom
Replies: 4
Views: 1055

Hello René, a nice set of images and great dedication over a number of years. My impression is that they might be zygotes or auxospores of a pennate diatom. This could explain: 1. Why they do not look like any diatom you are familiar with 2. why the shape is very inflated 3. why the 'ornamentation' ...
by BJ
Mon Jan 04, 2016 8:15 am
Forum: Photography Through the Microscope
Topic: Unknown ? Alga for ID please
Replies: 5
Views: 1099

Hello John, I agree 100% with Bernhardinho, these are fungal conidia.The group of fungi that produce them are known as 'aquatic hyphomycetes' - about 300 species are known. If you do an internet search you will see the range of unusual spores (conidia) that they produce. You should not be at all emb...
by BJ
Tue Dec 15, 2015 3:45 pm
Forum: Photography Through the Microscope
Topic: Unknown for ID please
Replies: 2
Views: 793

John,

I am almost certain that this is a fecal pellet....but what type of animal produced it? In the last image you can see remains of what it was feeding on which include a number of diatom valves. My guess would be a gastropod.

thank you for posting,

Brian
by BJ
Mon Nov 30, 2015 8:09 am
Forum: Photography Through the Microscope
Topic: Geranium robertianum (Herb Robert) "hair"
Replies: 11
Views: 2030

Hi, in reply to ChrisR, Charles has imaged (brilliantly as usual) a type III trichome (hair) which has five cells in the stalk. The pigmented cell contains and secretes flavonoids. See here: http://onlinelibrary.wiley.com/doi/10.1111/j.1756-1051.1990.tb02094.x/abstract Unfortunately, I do not have a...
by BJ
Sun Nov 22, 2015 8:02 am
Forum: Photography Through the Microscope
Topic: Charlie stomata
Replies: 5
Views: 1309

Hello Michael, I think that the red stained areas are short glandular trichomes which would stick out from the surface and be pulled off with the peel. Although not very clear in your image, i think that you can see the arrangement of the cells in the base of the trichome. Compare perhaps with this ...
by BJ
Fri Nov 20, 2015 10:47 am
Forum: Photography Through the Microscope
Topic: Charlie stomata
Replies: 5
Views: 1309

Michael, are you sure that the cells are actually present - could this be a cuticular peel or an acetate peel? My reason for thinking that this might be the case is that in your photos we see no 'side' cell walls and indeed no 'back' walls of the epidermal cells. If the epidermal cells were present,...
by BJ
Mon Oct 12, 2015 4:47 am
Forum: Photography Through the Microscope
Topic: Euglenoids
Replies: 4
Views: 898

Michael,

the images of Phacus are spectacular... as Charles said I do not think I have seen the side-on view before and I had never realised that they were so thin.

thank you for posting,

Brian