Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/26437
Title: | Abnormal xiphosurids, with possible application to Cambrian trilobites | Contributor(s): | Bicknell, Russel D C (author) ; Pates, Stephen (author); Botton, Mark L (author) | Publication Date: | 2018-06 | Open Access: | Yes | DOI: | 10.26879/866 | Handle Link: | https://hdl.handle.net/1959.11/26437 | Abstract: | Xiphosurida comprise an archetypal arthropod group of considerable interest to both biological and palaeontological researchers. This appeal is generated by a combination of unique anatomical features, utility as modern analogues for extinct arthropod groups, and an impressive fossil record. Although xiphosurids have been extensively studied, there are few published examples of abnormal specimens. Abnormalities in xiphosurids have mostly been attributed to injuries (either self-inflicted, from mating, or predation) or teratologies (developmental and genetic malfunctions). Here we summarise all previously recorded extant xiphosurid abnormalities and describe new examples of injuries and teratologies to Limulus polyphemus and Tachypleus tridentatus. Furthermore, we present the first evidence of injured fossil xiphosurids: Euproops danae and Mesolimulus walchi. We identify two main groups of telson teratologies and document new ‘U’ shaped cephalothoracic injuries to the anterior cephalothoracic margins of L. polyphemus and T. tridentatus. We show ‘V’ and ‘W’ shaped injuries to E. danae and M. walchi cephalothoracic sections. A further specimen of E. danae is described, which likely represents plastic deformation of a recently moulted exoskeleton, rather than an abnormality sensu stricto. We compare injuries on extant xiphosurids to extinct Cambrian trilobite injuries to suggest that rare cephalic injuries to trilobites were incurred during soft-shelled exoskeletal stages. Reviewing xiphosurid injuries through time is a pivotal step towards understanding how Recent and extinct arthropods responded to injuries. | Publication Type: | Journal Article | Source of Publication: | Palaeontologia Electronica, p. 1-17 | Publisher: | Coquina Press | Place of Publication: | United States of America | ISSN: | 1094-8074 1935-3952 1532-3056 |
Fields of Research (FoR) 2008: | 040308 Palaeontology (incl. Palynology) | Fields of Research (FoR) 2020: | 370506 Palaeontology (incl. palynology) | Socio-Economic Objective (SEO) 2008: | 970104 Expanding Knowledge in the Earth Sciences | Socio-Economic Objective (SEO) 2020: | 280107 Expanding knowledge in the earth sciences | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
---|---|
Appears in Collections: | Journal Article School of Environmental and Rural Science School of Science and Technology |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
openpublished/AbnormalBicknell2018JournalArticle.pdf | Published version journal article | 44.48 MB | Adobe PDF Download Adobe | View/Open |
This item is licensed under a Creative Commons License