| Euthycarcinoid Fossil range: Cambrian - Middle Triassic (210Ma)[1] |
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The Euthycarcinoids are a group of amphibious freshwater arthropods that until recently were only known from the Carboniferous onwards. Arthropods are Animals belonging to the Phylum Arthropoda (from Greek ἄρθρον arthron, " Joint " The Carboniferous is a geologic period and system that extends from the end of the Devonian period about 359 A single Ordovician/Silurian individual was identified in the Tumblagooda sandstone in 1993;[2] a Devonian example was added from the Rhynie chert in 2003,[3] and most recently a specimen has been found from the Cambrian. The Tumblagooda sandstone is a Geological formation deposited during the Silurian or Ordovician periods around four to five hundred million years ago The Rhynie chert is an Early Devonian Lagerstätte found near the village of Rhynie, Aberdeenshire, Scotland, containing exceptionally [1] The organisms may have produced some varieties of Protichnites, the earliest arthropod trackways on land. Protichnites is a genus of Trace fossil consisting of the imprints made by the walking activity of Arthropods It is likely that more than one type of arthropod
By the latest phylogenies, the organisms represent stem-group myriapods. Myriapoda is a Subphylum of Arthropods containing Millipedes Centipedes and others [1]
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Euchelicerata |
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The organisms appear to have become extinct in the Triassic mass extinction. Structure of crustaceans As Arthropods crustaceans have a stiff Exoskeleton, which must be shed to allow the animal to grow ( Ecdysis or molting An extinction event (also known as mass extinction; extinction-level event, ELE is a sharp decrease in the number of Species in a relatively short period [4]
References
- ^ a b c Vaccari NE, Edgecombe GD, Escudero C (2004) Cambrian origins and affinities of an enigmatic fossil group of arthropods. Nature 430: 554-557.
- ^ McNamara, K. J. ; Trewin, N. H. (1993). "A euthycarcinoid arthropod from the Silurian of Western Australia". Palaeontology 36: 319-335.
- ^ Anderson, L. I. ; Trewin, N. H. (2003). "An Early Devonian arthropod fauna from the Windyfield cherts, Aberdeenshire, Scotland". Palaeontology 46 (3): 467-509.
- ^ Ian Anderson (17 August 1991). "Is Australian fossil the ancestor of all insects?". New Scientist magazine (1782): 15.
This arthropod-related article is a stub. Arthropods are Animals belonging to the Phylum Arthropoda (from Greek ἄρθρον arthron, " Joint " You can help Wikipedia by expanding it. Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic