Unknown egg masses... any thoughts on (rough) ID

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Charles Krebs
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Unknown egg masses... any thoughts on (rough) ID

Post by Charles Krebs »

These were found floating on the water surface of a pond sample. Eggs are in a gelatinous mass, each egg itself had a "textured" surface as seen in the first image.

I don't recognize it... any thoughts as to what they might be?

(Images are all darkfield with 4X, 10X, 20X, and 40X and 1.67 NFK photoeyepiece).


Image

Image

Image

Image

pwnell
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Post by pwnell »

Incredibly well done. I cannot help with an ID but they sure are pretty. Looks like fortune cookies.

Jacek
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Post by Jacek »

Do not know what it is, but the pictures beautiful

arturoag75
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Post by arturoag75 »

Great shots :wink:

Ichthyophthirius
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Post by Ichthyophthirius »

Hi Charles,

They appear to be arthropod eggs (segmentation is visible), but I have no ID either. They trick, of course, is to wait a few days and to see what hatches :D

Olympusman
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Egg masses

Post by Olympusman »

Charles, Nice find whatever they are.
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

RogelioMoreno
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Post by RogelioMoreno »

Lovely set!

Rogelio

piermicro
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Post by piermicro »

Great as usual.

_Michal_
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Post by _Michal_ »

Fantastic set, as usual.
Best regards
Michal

Greenfields
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Post by Greenfields »

Absolutely gorgeous images.

I apologise if this is a naive question to those who are familiar with darkfield technique, but have these been made using a vertical illuminator or with a darkfield condenser, please ?

Henry
Feel free to edit my images.

Charles Krebs
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Post by Charles Krebs »

Thanks for the kind remarks!
but have these been made using a vertical illuminator or with a darkfield condenser, please ?
These were taken using a dry (0.8-0.95) darkfield condenser.
trick, of course, is to wait a few days and to see what hatches
Keeping an eye on them... I'll post if and when they develop into something more recognizable.

pwnell
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Post by pwnell »

Charles Krebs wrote:
but have these been made using a vertical illuminator or with a darkfield condenser, please ?
These were taken using a dry (0.8-0.95) darkfield condenser.
I am curious to the dry darkfield condenser you are using for 40x/0.95? I had to purchase the U-DCW which is an oil darkfield condenser to get DF at 0.95 NA. The U-DCD stops at 0.8 NA.

Charles Krebs
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Post by Charles Krebs »

Waldo...

I also need to use an oiled darkfield condenser for the 40/0.95 S Plan Apo.

For this I used the 40/0.70 S Plan Achromat. This has the same NA as the 20X S Plan Apo (0.70) so there was likely very little (if anything) to gain over just cropping into a shot made with the 20/0.70 other than lower overall noise because I made use of the full sensor. Inherently not a lot of fine detail in this subject at this stage, and especially so when looking "through" the gel and egg casing.

carlos.uruguay
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Post by carlos.uruguay »

Super!
(as always)

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