Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Keeping a lid on it: muscle scars and the mystery of the Mobergellidae
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-7366-7680
2017 (English)In: Zoological Journal of the Linnean Society, ISSN 0024-4082, E-ISSN 1096-3642, Vol. 180, p. 717-731Article in journal (Refereed) Published
Abstract [en]

Mobergellans were one of the first Cambrian skeletal groups to be recognized yet have long remained one of the mostproblematic in terms of biological function and affinity. Characterized by a disc-shaped, phosphatic sclerite, the mostdistinctive character of the group is a prominent set of internal scars, interpreted as representing sites of former muscleattachment. Predominantly based on muscle scar distribution, mobergellans have been compared to brachiopods,bivalves and monoplacophorans; however, a recurring theory that the sclerites acted as an operculum remains untested.Rather than correlate the number of muscle scars between taxa, here we focus on the percentage of the inner surfaceshell area that the scars constitute. We investigate two mobergellan species, Mobergella holsti and Discinella micans,and compare the Cambrian taxa with the muscle scars of a variety of extant and fossil marine invertebrate taxa to testwhether the mobergellan muscle attachment area is compatible with an interpretation as operculum. The only skeletalelements in our study with a comparable muscle attachment percentage are gastropod opercula. Complemented withadditional morphological information, our analysis supports the theory that mobergellan sclerites acted as an operculumpresumably from a tube-living organism. The paucity of tubes co-occurring with mobergellan sclerites could beexplained by the transportation and sorting of detached opercula, while the corresponding tube remained attached tosubstrata in shallower water. The operculum perhaps performed a similar role to that seen in serpulid annelids and inneritid gastropods sealing the living chamber of the organism to avoid desiccation or for protection.

Place, publisher, year, edition, pages
2017. Vol. 180, p. 717-731
Keywords [en]
Discinella – Mobergella – Cambrian – Annelida – Brachiopoda – Mollusca – operculum
National Category
Geology
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-2465OAI: oai:DiVA.org:nrm-2465DiVA, id: diva2:1147105
Projects
Ett grunt ursprung
Funder
Swedish Research Council, VR2016-04610Available from: 2017-10-04 Created: 2017-10-04 Last updated: 2017-11-27Bibliographically approved

Open Access in DiVA

fulltext(3219 kB)4 downloads
File information
File name FULLTEXT01.pdfFile size 3219 kBChecksum SHA-512
1ebd55c3d206019aa70539a1b9cb4f10e04f5c6cd160000954fad8f3963c4d8f028ce0db76be1dc9f1e41e6443e2ce9d0c7028b52f7686b66106a39f54d688d6
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Skovsted, Christian
By organisation
Department of Paleobiology
In the same journal
Zoological Journal of the Linnean Society
Geology

Search outside of DiVA

GoogleGoogle Scholar
Total: 4 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 13 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf