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Exceptionally-prese...
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Butler, Aodhán D.,1986-Uppsala universitet,Paleobiologi,Earth Sciences, Palaeobiology
(författare)
Exceptionally-preserved Mickwitzia from the Indian Springs Lagerstätte.
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LIBRIS-ID:oai:DiVA.org:uu-216149
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-216149URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:vet swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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A new assemblage of the early Cambrian stem group brachiopod Mickwitzia is described from the Indian Springs Lagerstätte possessing exceptionally preserved mantle setae. Critical analysis of shell structure and mantle setae from these specimens with those from additional sites with variable diagenetic history reveals the extent of taphonomic alteration and further sheds light on the phylogenetic position of the mickwitziids. A morphometric approach to shell outline and growth landmarks within these specimens reveals a clear species level discriminant signal of Nevada Mickwitzia in comparison to M. monlifera from Sweden. Detailed electron micrographs allow revision of the genus diagnosis for Mickwitzia based on presence of inward pointing phosphatic cones and tangential setae bearing tubes. We also conclude the inward pointing cone structures are not consistent with setal bearing structures as previously thought, but rather represent an endopunctae-like structure. A tommotiid-like shell architecture and presence of acrotretid columns in the dorsal juvenile shell of M. cf. occidens further strengthens the proposed close relationship between stem-group brachiopods and tommotiids.
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Streng, MichaelUppsala universitet,Paleobiologi,Earth Sciences, Palaeobiology(Swepub:uu)mistr021
(författare)
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Holmer, LarsUppsala universitet,Paleobiologi,Earth Sciences, Palaeobiology(Swepub:uu)larholme
(författare)
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Babcock, LorenLund,Palaeobiology
(författare)
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Uppsala universitetPaleobiologi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Paleontology0022-33601937-2337
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