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Showing results for tags 'chengjiang biota'.
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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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- achlysopsis
- acorn worm
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- alum shale
- antelope springs
- anti atlas
- aphelaspis
- aphelaspis brachyphasis
- archaeocyathid
- asaphiscus
- asaphiscus wheeleri
- australia
- barrandagnostus
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- barrios fascies
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- biwabek
- biwabek formation
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- bolaspidella housensis
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- chengjiang biota
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- choiidae
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- collenia undosa
- conasauga formation
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- east kootenay mountains
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- ellipsocephalus hoffi
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- elrathia kingii
- embalse del luna
- enteropneusta
- eoorthis
- eoorthis primordialis
- ethmocyathus
- ethmocyathus lineatus
- fali
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525-Million-Year-Old Fossil Solves Debate Over Brain Evolution
Oxytropidoceras posted a topic in Fossil News
525-Million-Year-Old Fossil Solves Debate Over Brain Evolution University of Arizona, November 25, 2022 https://scitechdaily.com/science-textbooks-wrong-525-million-year-old-fossil-defies-common-explanation-for-brain-evolution/ https://www.sciencedaily.com/releases/2022/11/221125132137.htm https://www.technologynetworks.com/neuroscience/news/525-million-year-old-fossil-solves-debate-over-brain-evolution-367879 The paywalled paper is: Nicholas J. Strausfeld, Xianguang Hou, Marcel E. Sayre, and Frank Hirth, 2022, The lower Cambrian lobopodian Cardiodictyon resolves the origin of euarthropod brains. Science, 378 (6622), pp. 905-909. 905 DOI: 10.1126/science.abn6264 https://www.science.org/doi/10.1126/science.abn6264 Yours, Paul H.-
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From the album: Trilobites
Redlichia mansuyi (Reese & Endo, 1937) Cambrian Chengjiang biota, Yannan Province, China-
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From the album: Trilobites
Palaeolenus lantenoisi (Mansuyi 1912) Chengjiang Biota, Yunnan Province, China-
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Not 100% sure what it is - could be either a rare Yunnanozoon lividum Hou, Ramsköld & Bergström, 1991, a Hemichordate or - more likely Haikouella lanceolata Chen, Huang & Li, 1999, a Chordate. Even Haikouichthys ercaicunensis Shu, Conway Morris, Han & Zhang, a primitive fish, is still a posibility. Under UV light Reconstruction of Haikouella (from Wikipedia): Reconstruction of Haikouichthys (from Wikipedia): Lit.: Degan Shu, et al. (2003) A New Species of Yunnanozoan with Implications for Deuterostome Evolution. Science 299, 1380. World heritage nomination: Chengjiang Fossil Site.
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