Simocephalus Vetulus
Simocephalus Vetulus
I found a rather big Simocephalus Vetulus in a recently collected water sample. She turned out to have small females under her carapace. In females, there is a large space between the back and the dorsal side of the carapace that functions as a brood pouch. I can spot at least 10 small females. Simocephalus Vetulus reproduces parthenogenetically most of the year (producing females).
Polarized light with 4X objective, size of the animal is just below 3 mm:
Fluorescent light with 4X objective:
Close-up with the 10X objective. Fluorescent light. Showing the small females (which were moving around)
The last image is a smaller female, just below 1 mm. In "poor man's" darkfield. I did not use a proper darkfield stop because I did not have one mounted in the condenser turret, but I instead set the condenser between two DIC positions having the metal frames of the DIC prisms act as a darkfield stop. Not very sophisticated, but I was somewhat surprised how well it worked.
Polarized light with 4X objective, size of the animal is just below 3 mm:
Fluorescent light with 4X objective:
Close-up with the 10X objective. Fluorescent light. Showing the small females (which were moving around)
The last image is a smaller female, just below 1 mm. In "poor man's" darkfield. I did not use a proper darkfield stop because I did not have one mounted in the condenser turret, but I instead set the condenser between two DIC positions having the metal frames of the DIC prisms act as a darkfield stop. Not very sophisticated, but I was somewhat surprised how well it worked.
Flickr: https://www.flickr.com/photos/micromundus
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival
Re: Simocephalus Vetulus
Bonjour.
Superbes photos clair et nette.
Merci pour le partage.
Cordialement seb
Superbes photos clair et nette.
Merci pour le partage.
Cordialement seb
Microscope Leitz Laborlux k
Boitier EOS 1200D + EOS 1100D
Boitier EOS 1200D + EOS 1100D
Re: Simocephalus Vetulus
Yet more wonderful images ...
Zeiss Standard WL (somewhat fashion challenged) & Wild M8
Olympus E-P2 (Micro Four Thirds Camera)
Olympus E-P2 (Micro Four Thirds Camera)
Re: Simocephalus Vetulus
Stunning images! I've never seen better old chap. Not my area, but WOW - these are simply sublime!
John B
Re: Simocephalus Vetulus
Wonderful photos, another excellent subject / critter to study.
Re: Simocephalus Vetulus
Fantastic life cycle encounter, hkv. A few weeks ago (with the lamb still in the oven), we had candy decorations just like that your cladocerans happy brood...we call these candies: "Peeps", Easter season confections!
Your 'peeps' come in similar colors,hkv! charlie guevara
Your 'peeps' come in similar colors,hkv! charlie guevara
Re: Simocephalus Vetulus
Outstanding images Hakan
Re: Simocephalus Vetulus
I can only echo all of the above. Well done.
Re: Simocephalus Vetulus
Thanks all for looking and for your kind comments!
Flickr: https://www.flickr.com/photos/micromundus
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival
Re: Simocephalus Vetulus
Fantastic imaged!
Re: Simocephalus Vetulus
Your "poor man's darkfield" worked out very well indeed, that's a superb image. Maybe not "orthodox", but superb all the same. I'd remember the "recipe" if I were you!
Cheers,
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
Kurt Maurer
League City, Texas
email: ngc704(at)gmail(dot)com
https://www.flickr.com/photos/67904872@ ... 912223623/
Re: Simocephalus Vetulus
Thanks Cyclops and Kurt! Yes, I was surprised myself how the condenser could be "misused" and still getting decent DF.
Flickr: https://www.flickr.com/photos/micromundus
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival
Instagram: https://www.instagram.com/micromundusphotography
Web: https://hakankvarnstrom.com
Olympus BX51 | Olympus CX23 | Olympus SZ40 | Carl ZEISS EVO LS 10 Lab6 | Carl Zeiss Jena Sedival