Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Shell structure, ornamentation and affinity of the problematic early Cambrian brachiopod Heliomedusa orienta
Department of Geology, Northwest University, Xi’an.ORCID-id: 0000-0001-7677-5054
Uppsala Universitet.ORCID-id: 0000-0003-3629-0049
Naturhistoriska riksmuseet, Enheten för paleobiologi.ORCID-id: 0000-0001-7366-7680
Department of Geology, Northwest University, Xi’an.
Visa övriga samt affilieringar
2020 (Engelska)Ingår i: Lethaia: an international journal of palaeontology and stratigraphy, ISSN 0024-1164, E-ISSN 1502-3931, Vol. 53, nr 4, s. 574-587Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The origin of the Brachiopoda has long been a hotly debated topic, and various models have been proposed following the latest finds of exceptionally preserved material. The lower Cambrian (Stage 3) Heliomedusa orienta from the Chengjiang Konservat‐Lagerstätte, eastern Yunnan of South China, is an important example of exceptional preservation. A wide variety of affinities have been proposed for Heliomedusa, but recently it has been suggested to reside within the mickwitziids, which may form a stem group to the Brachiopoda. Detailed studies of exceptionally preserved Heliomedusa have increased our knowledge of the soft‐part anatomy of this important early brachiopod, but unfortunately, almost nothing is known about its shell structure. Here, we describe new exceptionally preserved specimens from the Chengjiang biota to better reveal both shell structure and ornamentation. Its reticulate–pustulose ornament and tubular structure are reminiscent of traits seen in other mickwitziid brachiopods. In addition, two types of setae can be observed. Apart from the pyritized marginal mantle setae, some tubules are filled with iron oxides, potentially representing thinner and shorter penetrative setae. Both valves of H. orienta appear to have been less mineralized as compared to Mickwitzia monilifera, and the two species differ in diameter and density of tubules and pustules, and in terms of slightly less projected profile of ventral valve with lower umbo posteromedially placed. Although Heliomedusa clearly is closely related to Mickwitzia, their different preservational modes (compacted poorly mineralized/noncompacted mineralized) make detailed comparison difficult; they are provisionally kept as separate genera pending further studies of better‐preserved Chinese material.

Ort, förlag, år, upplaga, sidor
2020. Vol. 53, nr 4, s. 574-587
Nyckelord [en]
Brachiopods, Heliomedusa, Mickwitzia, shell structure, ornamentation, affinity, setae
Nationell ämneskategori
Geologi
Forskningsämne
Livets mångfald
Identifikatorer
URN: urn:nbn:se:nrm:diva-3876DOI: DOI 10.1111/let.12379OAI: oai:DiVA.org:nrm-3876DiVA, id: diva2:1505445
Forskningsfinansiär
Vetenskapsrådet, VR 2018‐03390Vetenskapsrådet, VR 2016‐04610Tillgänglig från: 2020-12-01 Skapad: 2020-12-01 Senast uppdaterad: 2020-12-01Bibliografiskt granskad

Open Access i DiVA

fulltext(8549 kB)157 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 8549 kBChecksumma SHA-512
1b7a30fc9dbcbe3f0c2d477f177d6067badaed7dc46c5688ff9f647fa4d440f6b312c6617f9c4670b43288fc3ac9d935036c6b8b983ea93a6ed8865d797a5098
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltexthttps://onlinelibrary.wiley.com/doi/10.1111/let.12379

Sök vidare i DiVA

Av författaren/redaktören
Liang, YueHolmer, Lars, E.Skovsted, ChristianZhang, Zhifei
Av organisationen
Enheten för paleobiologi
I samma tidskrift
Lethaia: an international journal of palaeontology and stratigraphy
Geologi

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 157 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 25 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf