Change search
ReferencesLink to record
Permanent link

Direct link
Developmental biology of the early Cambrian cnidarian Olivooides.
Peking University.
University of Bristol.
Swedish Museum of Natural History, Department of Paleobiology. University of Bristol.
Nanjing Institute of Geology and Palaeontology.
Show others and affiliations
2016 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 59, no 3, 387-407 p.Article in journal (Refereed) Published
Abstract [en]

Fossilized embryos afford direct insight into the pattern of development in extinct organisms, providing unique tests of hypotheses of developmental evolution based in comparative embryology. However, these fossils can only be effective in this role if their embryology and phylogenetic affinities are well constrained. We elucidate and interpret the development of Olivooides from embryonic and adult stages and use these data to discriminate among competing interpretations of their anatomy and affinity. The embryology of Olivooides is principally characterized by the development of an ornamented periderm that initially forms externally and is subsequently formed internally, released at the aperture, facilitating the direct development of the embryo into an adult theca. Internal anatomy is known only from embryonic stages, revealing two internal tissue layers, the innermost of which is developed into three transversally arranged walls that partly divide the lumen into an abapertural region, interpreted as the gut of a polyp, and an adapertural region that includes structures that resemble the peridermal teeth of coronate scyphozoans. The anatomy and pattern of development exhibited by Olivooides appears common to the other known genus of olivooid, Quadrapyrgites, which differs in its tetraradial, as opposed to pentaradial symmetry. We reject previous interpretations of the olivooids as cycloneuralians, principally on the grounds that they lack a through gut and introvert, in embryo and adult. Instead we consider the affinities of the olivooids among medusozoan cnidarians; our phylogenetic analysis supports their classification as totalgroup Coronata, within crown-Scyphozoa. Olivooides and Quadrapyrgites evidence a broader range of life history strategies and bodyplan symmetry than is otherwise commonly represented in extant Scyphozoa specifically, and Cnidaria more generally.

Place, publisher, year, edition, pages
2016. Vol. 59, no 3, 387-407 p.
Keyword [en]
development, embryo, Cnidaria, Scyphozoa, Kuanchuanpu, Cambrian
National Category
Natural Sciences Geology Evolutionary Biology
Research subject
Ecosystems and species history
Identifiers
URN: urn:nbn:se:nrm:diva-1822DOI: 10.1111/pala.12231OAI: oai:DiVA.org:nrm-1822DiVA: diva2:967394
Funder
Swedish Research Council, 2010-3929, 2013-4290Paul Scherrer Institut, PSI, 20040261, 20050147, 20050597, 20060152, 20060846, 20070197, 20080872, 20100167, 20110963, 20130185, 20141047EU, FP7, Seventh Framework Programme, 312284
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2016-09-19Bibliographically approved

Open Access in DiVA

fulltext(17100 kB)4 downloads
File information
File name FULLTEXT01.pdfFile size 17100 kBChecksum SHA-512
4ba304bc03598ef16917713f96c545282db1c1e6e2f28140e3ba8ed3d79c61b69fca05c5470b6f656e4b1598b51c4dc1e36bc237d093652b03802b7a815e49d6
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Cunningham, JohnBengtson, Stefan
By organisation
Department of Paleobiology
In the same journal
Palaeontology
Natural SciencesGeologyEvolutionary Biology

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

Altmetric score

Total: 8 hits
ReferencesLink to record
Permanent link

Direct link