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Showing results for tags 'chordate'.
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The longest one is roughly 2cm long. I’ve counted 12 on the rock, which itself is about 5cm long. All I know is that it’s from the Maotianshan shales in China. I was told it’s a Yunnanozoon, but I believe this is incorrect as the person I got it from is often wrong with their identifications.
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- cambrian
- chengjiang
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Hello! I bought these Cambrian soft tissue fossils supposedly from Yunnan in china off of online auction site. I won them in a bid for suspiciously cheap. They seem real to me, but I’d be interested in confirmation of that. I’m also interested what you guys have to say as to what these are. Thanks! One is listed as Naraoia spinosa, the other, fainter one is listed as Vetulicola.
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- armored fish
- bone
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- assemblage
- brachipod
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If you haven't read my 'about' on my profile, then... What are you doing? I'm the best person on this forum, duh, you should've memorised it by now(!) Jokes aside, I love conodonts. The gorgeous little extinct wigglers that resemble eels... They're so common, that they're used as index fossils. What does that mean? People identify the age of fossils, based on conodont elements found with them... That's crazy! How does this work? Well, evolution changes animals over time, as you'll know, which means, due to the abundance, and date range of the specimen, you can work out age of sediments based on the morphology of the fossils... Pretty cool, huh!? And not even just that, as they're made out of apatite (not appetite :BigSmile:), the colour of the fossils can indicate the temperature of the fossils... Wow... Here's the Conodont Alteration Index (CAI), taken from CAI - Wikipedia: Little fact here - conodonts first appeared in the Cambrian, about 540 mya (million years ago), and only went extinct yesterday. Uhm, sorry, let me check my notes on that - ah, in the early Jurassic / late Triassic, about 200 mya... Time flies, feels like it was last week the Mesozoic began! Here's a nice reconstruction of one. You can see the similarities between them and eels, but, although my friend Daniel likes to annoy me by saying "Isaac likes extinct eels", they are not eels. Notice the rather colourful array of teeth? Here's a full set: Looks like something out of a horror movie, huh? That's why I love 'em! Oh, also, here's some nice papers that I'd recommend: Overview of the conodont's history Conodont skeletal morphology Right, what was the point of this? Oh, yeah. Unfortunately (well, I say unfortunately, but it's a blessing), I get my material from the Cotswolds, in the south of England. If you've never heard of that, it's an incredibly famous area, famous for its Middle Jurassic oolitic limestone, abundant in microfossils. Have a link to everyone's favourite site's page on it Wikipedia - Cotswolds. Now, unfortunately, Middle Jurassic means that I can't get any of the little chordates... Ugh! Anyone care to share photos of their specimen, so I have a reason to cry?
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Hello everyone! I recently received this cool fossil from the Devonian in Scotland, it is a Palaeospondylus gunni: I have seen fossils of this enigmatic organism prepared in really wonderful ways to expose more of the animal and I was wondering: would this be possible to do here? I am not exactly sure of the process used on the others, possibly just really fine air abrasion? The fossil seems to be rather thin against the rock but it isn't completely flat, here are some pictures I took under the digital microscope, hopefully they might show it a bit better. Any help would be greatly appreciated, I am happy to provide more pictures if necessary. Thank you for your time!
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- carbonized
- chordate
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