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Comment on: Álvaro, J. J., Esteve, J. & Zamora, S. 2019. Morphological assessment of the earliest paradoxidid trilobites (Cambrian Series 3) from Morocco and Spain [Geological Magazine]

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cris.lastimport.scopus2024-02-12T19:38:55Z
dc.abstract.enÁlvaro et al. (2018) argued that at least six species of Acadoparadoxides described from the lower–middle Cambrian boundary interval successions in the Anti-Atlas of Morocco all belong to Acadoparadoxides mureroensis (Sdzuy, 1958), which was first described from the Iberian Chains, Spain. Their study is based entirely on a morphometric analysis, which ignores the stratigraphic occurrences of particular morphotypes, deformation-related compaction of individual sclerites and their original relief, and thus underestimates some of the earlier described differences between these species. Their synonymization of a number of named Acadoparadoxides species is based on the morphometric approach that they rely on to distinguish between a number of congeneric species. A morphometric approach as applied by Álvaro et al. will lead to an apparent synonymy based on sclerites of similar taxa. Thus, morphometric study must be complemented by an analysis of which morphologically distinctive sclerites (i.e. cranidia and pygidia) are stratigraphically associated, and evaluation of which measurements are more critical to distinguishing sclerites that may represent distinct taxa, and the recognition of related character sets. Apart from demonstrating problems in the conclusion of Álvaro et al., our more inclusive approach of morphologic and stratigraphic analysis works to reassert the diagnostic characters and differences between six earlier named species of Acadoparadoxides. Our conclusions also emphasize the taxonomic problems associated with the identification and morphological variation of A. mureroensis owing to tectonic deformation of its topotype material and to questionable taxonomic assignment of Acadoparadoxides specimens from the Iberian sections.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorGeyer, Gerd
dc.contributor.authorNowicki, Jakub Jacek
dc.contributor.authorŻylińska, Anna
dc.contributor.authorLanding, Ed
dc.date.accessioned2024-01-24T19:49:57Z
dc.date.available2024-01-24T19:49:57Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number10
dc.description.volume156
dc.identifier.doi10.1017/S0016756818000961
dc.identifier.issn0016-7568
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103310
dc.identifier.weblinkhttps://doi.org/10.1017/S0016756818000961
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofGeological Magazine
dc.relation.pages1691-1707
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.entrilobite systematics
dc.subject.enbiostratigraphy
dc.subject.enAnti-Atlas
dc.subject.enIberian Chains
dc.subject.enWest Gondwana
dc.subject.enmorphometrics
dc.titleComment on: Álvaro, J. J., Esteve, J. & Zamora, S. 2019. Morphological assessment of the earliest paradoxidid trilobites (Cambrian Series 3) from Morocco and Spain [Geological Magazine]
dc.typeJournalArticle
dspace.entity.typePublication