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Spider in Baltic Amber

 
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Walter Piorkowski



Joined: 14 Aug 2006
Posts: 684
Location: South Beloit, Ill

PostPosted: Wed Feb 21, 2018 5:23 pm    Post subject: Spider in Baltic Amber Reply with quote






Spider in Baltic Amber

What does a 40 million year old spider look like? Remarkably the same as the spiders we see today. My analysis sees a full abdomen, indicating a actively feeding subject at death. Death would have been by asphyxiation. Note a fog and many small bubbles in the amber under the abdomen. I believe this to be the last exhalations of air from the book lungs in that location.

Luckily two air bubbles left the legs and carapace before solidification. Some nice details can be seen though the amber. The spiked circular thing in front of the mouth area is just the face on view of the second pedipalp tarsal segment. The spinnerets show up well but unfortunately, I can detect no silk drag line. One large silk spigot is visible. There are good details in the leg segments and claws. Unfortunately, there are no details of the chelicerae.
Walt

53 images stacked on both images, each using different lighting. Amber in air.
Both images 9x on camera sensor. 6.3x objective. Horizontal F.O.V. approx. 2mm
Canon 50D on Leitz Ortholux microscope.
Zerene and Photoshop processing
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Sumguy01



Joined: 28 Jan 2013
Posts: 1109
Location: Ketchikan Alaska USA

PostPosted: Thu Feb 22, 2018 9:16 pm    Post subject: Reply with quote

Very Happy Interesting.
Thanks for sharing.
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Walter Piorkowski



Joined: 14 Aug 2006
Posts: 684
Location: South Beloit, Ill

PostPosted: Mon Mar 05, 2018 12:16 pm    Post subject: Reply with quote

Thank you. Sumguy. Walt
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carlos.uruguay



Joined: 23 Feb 2012
Posts: 4941
Location: Uruguay - Montevideo - America del Sur

PostPosted: Mon Mar 05, 2018 4:29 pm    Post subject: Reply with quote

Super!
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