Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20085
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dc.contributor.authorSkovsted, Christian Ben
dc.contributor.authorBetts, Marissa Jen
dc.contributor.authorTopper, Timothy Pen
dc.contributor.authorBrock, Glenn Aen
dc.date.accessioned2017-02-23T10:18:00Z-
dc.date.issued2015-
dc.identifier.citationMemoirs of the Association of Australasian Palaeontologists, 48(1), p. 1-117en
dc.identifier.issn0810-8889en
dc.identifier.issn2205-8877en
dc.identifier.urihttps://hdl.handle.net/1959.11/20085-
dc.description.abstractThe camenellan tommotiid Dailyatia is one of the most common fossils in shallow water carbonates from Cambrian Stages 2-4 in South Australia (Arrowie and Stansbury basins). Six species of Dailyatia are documented and new terminology for describing camenellan sclerites is introduced. Dailyatia sclerites are found in three fundamental sclerite types (A-C), each of which may be present in one to three sub-types depending on species. The previously described species Dailyatia ajax Bischoff 1976 and D. macroptera (Tate 1892) are revised and four additional species are described for the first time from South Australia. These include D. odyssei Evans & Rowell 1990, previously known only from Antarctica, and two new species; D. bacata sp. nov. and D. helica sp. nov. as well as a species left under open nomenclature. Two of the recognised species (D. macroptera and D. helica) occur in two different ecophenotypic variants. Species and variants are defined by differences in sclerite types present in the scleritome, sclerite morphology and ornament. The sclerites of Dailyatia are finely laminated with distal expansion of laminae supporting the prominent concentric ribs. The external surface is covered by a fine reticulate network which indicates that the sclerites were at least partly embedded in soft integument. The pattern of incremental growth reveals specific initial and possible gerontic growth stages with unique surface sculptures. Evidence of physical damage and growth disturbances is common in Dailyatia sclerites and many specimens reveal preferential abrasion of the apex. Apical canals are present in all sclerites and are connected to specialised internal apical structures. The internal surface of the sclerites in most species reveals raised platforms and depressed, scar like areas forming unique patterns in each sclerite type, presumably representing muscular attachment. Two specimens revealing ontogenetic fusion of Dailyatia sclerites have been recovered. Based on all available evidence, a new reconstruction of the Dailyatia scleritome is proposed. In the reconstruction, a central row of A and paired B sclerites is flanked on both sides by one or two lateral rows of C sclerites. The exact number of sclerites may vary between species. This reconstruction is based on an assumed slug-like bodyplan and the Dailyatia animal is considered to be a vagrant, benthic animal living in and around archaeocyathan-microbial buildups and in other shallow water carbonate environments.en
dc.languageenen
dc.publisherAustralasian Palaeontologistsen
dc.relation.ispartofMemoirs of the Association of Australasian Palaeontologistsen
dc.titleThe early Cambrian tommotiid genus Dailyatia from South Australiaen
dc.typeJournal Articleen
dc.subject.keywordsPalaeontology (incl. Palynology)en
dc.subject.keywordsAnimal Systematics and Taxonomyen
dc.subject.keywordsPalaeoecologyen
local.contributor.firstnameChristian Ben
local.contributor.firstnameMarissa Jen
local.contributor.firstnameTimothy Pen
local.contributor.firstnameGlenn Aen
local.relation.isfundedbyARCen
local.subject.for2008060206 Palaeoecologyen
local.subject.for2008040308 Palaeontology (incl. Palynology)en
local.subject.for2008060301 Animal Systematics and Taxonomyen
local.subject.seo2008970104 Expanding Knowledge in the Earth Sciencesen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailmbetts7@une.edu.auen
local.output.categoryC1en
local.grant.numberDP120104251en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-chute-20170208-153342en
local.publisher.placeAustraliaen
local.format.startpage1en
local.format.endpage117en
local.peerreviewedYesen
local.identifier.volume48en
local.identifier.issue1en
local.contributor.lastnameSkovsteden
local.contributor.lastnameBettsen
local.contributor.lastnameTopperen
local.contributor.lastnameBrocken
dc.identifier.staffune-id:mbetts7en
local.profile.orcid0000-0002-4884-825Xen
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:20283en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleThe early Cambrian tommotiid genus Dailyatia from South Australiaen
local.relation.fundingsourcenoteFinancial support for this project comes from the Swedish Research Council (VR) to CBS, Australian Research Council Discovery Project (#DP 120104251) to GAB, a Macquarie University Development Research Grant to CBS and GAB. Parts of this paper were written whilst GAB had fellowships from the Wenner-Gren Foundation (Sweden) and the Institute of Advanced Study, Durham University.en
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.relation.grantdescriptionARC/DP120104251en
local.search.authorSkovsted, Christian Ben
local.search.authorBetts, Marissa Jen
local.search.authorTopper, Timothy Pen
local.search.authorBrock, Glenn Aen
local.uneassociationUnknownen
local.atsiresearchNoen
local.sensitive.culturalNoen
local.year.published2015en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/87b3ee9a-5e98-46cb-9705-2d3ed9e41e64en
local.subject.for2020310306 Palaeoecologyen
local.subject.for2020370506 Palaeontology (incl. palynology)en
local.subject.for2020310401 Animal systematics and taxonomyen
local.subject.seo2020280107 Expanding knowledge in the earth sciencesen
local.subject.seo2020280102 Expanding knowledge in the biological sciencesen
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