Pyrgodiscus armatus diatom (trial)
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Pyrgodiscus armatus diatom (trial)
Extremely rare diatom, endemic to Brno, Czechia.
300x DIC
Re: Pyrgodiscus armatus diatom (trial)
Incredible sharpness for that level of magnification!
When a diatom is classified as rare, is that simply due to the specific conditions needed for survival, i.e., only a few bodies of water in one region, or is it based upon a population probability per volumetric unit?
When a diatom is classified as rare, is that simply due to the specific conditions needed for survival, i.e., only a few bodies of water in one region, or is it based upon a population probability per volumetric unit?
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Re: Pyrgodiscus armatus diatom (trial)
Very nice!
300X is an unusual number -- what were the optics for this?
--Rik
300X is an unusual number -- what were the optics for this?
--Rik
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Re: Pyrgodiscus armatus diatom (trial)
60x with PE5x projection eyepiece.rjlittlefield wrote: ↑Mon Nov 14, 2022 7:29 pmVery nice!
300X is an unusual number -- what were the optics for this?
--Rik
You are right, the word rare is subjective. Some base it on (x) number of samples found in (y) number of raw materials. There are many exceptionally rare diatoms such as Kittonia elaborata (Oamaru) and Kittonia tripedia (only in Russia).J_Rogers wrote: ↑Mon Nov 14, 2022 7:23 pmIncredible sharpness for that level of magnification!
When a diatom is classified as rare, is that simply due to the specific conditions needed for survival, i.e., only a few bodies of water in one region, or is it based upon a population probability per volumetric unit?
Some large ones are very rare too.
In the case of the P. armatus, according to Anne, one needs to go through 2kg of raw material to get a small vial of diatoms, and among them, one has the chance of finding an undamaged copy (this one is damaged at the back).
I would base rarity on either the accessibility of the location (Antarctican diatoms are all rare) or the occurrence per quantity of raw material.
Re: Pyrgodiscus armatus diatom (trial)
Hello,
wonderful image!
I think this one is rare, because it is endemic, fossil and only found on this special place in Brno, Augarten.
The deposit is no longer accesible, that makes it even rarer.
best
anne
wonderful image!
I think this one is rare, because it is endemic, fossil and only found on this special place in Brno, Augarten.
The deposit is no longer accesible, that makes it even rarer.
best
anne