Fossil marine 'thingy'

Images made through a microscope. All subject types.

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75RR
Posts: 714
Joined: Thu May 22, 2014 12:38 pm
Location: Estepona

Post by 75RR »

Pyxilla johnsoniana: not such an "unproductive sample" after all!

http://www.oamarudiatoms.co.uk/photo_5703304.html

Going to have to read-up on diatoms, that one threw me.

Very nice images, can you provide some info?

vasselle
Posts: 1497
Joined: Sun Jan 05, 2014 2:12 am
Location: France

Post by vasselle »

Hello
Superbe
Microscope Leitz Laborlux K
Boitier EOS 1200d

Cactusdave
Posts: 1631
Joined: Tue Jun 09, 2009 12:40 pm
Location: Bromley, Kent, UK

Post by Cactusdave »

That Pyxylla really is a remarkable diatom and in an excellent state of preservation, with what must be a fragile 'horn' intact. One I don't think I've ever seen before. A nice find Beats.
I wonder if those sterrasters might also be found in the Barbados fossil Radiolaria deposits. Some of those also tend to be very spicule rich. Maybe its also a case of needing the correct geological age of the deposit for the sterraster-bearing sponges to be common in the fauna of the time.
Leitz Ortholux 1, Zeiss standard, Nikon Diaphot inverted, Canon photographic gear

BJ
Posts: 354
Joined: Sat Sep 29, 2007 10:53 am
Location: England

Post by BJ »

Hi,

possible sterraster fossils are known from the cambrian and well preserved ones from the jurassic onwards. They occur here (Portugal) in a miocene deposit near me.They are produced by one group (family) of sponges, the Geodiidae. They are most common in very deep water on soft muddy bottoms, but there are some species in shallow water even occuring in the intertidal.

Pyxilla = one weird diatom !!

thanks for posting the collage - beautifully crisp,

regards,

brian

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