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Showing results for tags 'yuknessia'.
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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.
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Found in Blacksmith Canyon, UT area. Research indicates there are exposures of Cambrian in/near this formation. Burgess Shale type Cambrian fossils are found nearby in the Wellsville mountains. Wondering if could be Yuknessia or Sphenoecium. References: https://kumip.ku.edu/cambria.../Utah-Localities&Geology.html http://www.thefossilforum.com/index.php?/topic/58341-utah-fossil-id-not-the-trilobite/ https://core.ac.uk/download/pdf/32568435.pdf https://www.researchgate.net/publication/331617957_The_Spence_Shale_Lagerstatte_an_Important_Window_into_Cambrian_Biodiversity
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- burgess shale-type preservation
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From the album: Invertebrates
Yuknessia sp. Early Cambrian Haikou Yunnan China Yuknessia was originally interpreted as a green alga and has since been reinterpreted it as a colonial pterobranch.-
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