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Showing results for tags 'hamatolenus'.
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I'm looking for a little advice on a nice group of trilobites I purchased recently. I have no information on them, aside from that they came from Morocco, however after a bit of research I'm wondering if they're Hamatolenus from the Jbel Wawrmast Formation. With that said I don't know a whole lot about Moroccan trilobites and I have some questions as to their authenticity. I'm almost 100% sure these are real, but after studying them closely a few things bother me. For one, the smallest trilobite at the bottom has a hole beneath it - I can't really tell if it's been reattached or not. The surrounding rock also features a few tiny holes which I found suspicious (I'll add further pictures shortly). The whole piece also has a clay-like smell. With that said the edges of the plate are clean cut and seem to show natural rock layers, which I wouldn't imagine you'd see with a fake. Overall I can't imagine how something like this would be faked (and I wouldn't imagine it'd be worth the effort for the price I paid). But any input would be greatly appreciated as I know lots you are far more knowledgeable about Moroccan trilobites than myself!
A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.