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https://hdl.handle.net/1959.11/9527
Title: | A new leanchoiliid megacheiran arthropod from the lower Cambrian Emu Bay Shale, South Australia | Contributor(s): | Edgecombe, GD (author); Garcia-Bellido, DC (author); Paterson, John R (author) | Publication Date: | 2011 | Open Access: | Yes | DOI: | 10.4202/app.2010.0080 | Handle Link: | https://hdl.handle.net/1959.11/9527 | Abstract: | The Leanchoiliidae is well-known from abundant material of 'Leanchoilia', from the Burgess Shale and Chengjiang Konservat-Lagerstätten. The first Australian member of the group is 'Oestokerkus megacholix' gen. et sp. nov., described from the Emu Bay Shale (Cambrian Series 2, Stage 4), at Buck Quarry, Kangaroo Island, South Australia, and is intermediate in age between the well known leanchoiliid species from the Burgess Shale and Chengjiang. Phylogenetic analysis of "short great appendage" arthropods (Megacheira) in the context of the chelicerate stem group resolves the Australian species as sister to Burgess Shale, Utah, and Chengjiang 'Leanchoilia' species, but most readily distinguished from 'Leanchoilia' and 'Alalcomenaeus' by a different telson shape, interpreted as being forked, widening distally, and with a few dorsally curved spines at the posterior angle. Leanchoiliid interrelationships are stable to alternative character weights, and Megacheira corresponds to a clade in most analyses. | Publication Type: | Journal Article | Source of Publication: | Acta Palaeontologica Polonica, 56(2), p. 385-400 | Publisher: | Polska Akademia Nauk, Instytut Paleobiologii | Place of Publication: | Poland | ISSN: | 1732-2421 0567-7920 |
Fields of Research (FoR) 2008: | 060301 Animal Systematics and Taxonomy 040308 Palaeontology (incl Palynology) 060309 Phylogeny and Comparative Analysis |
Socio-Economic Objective (SEO) 2008: | 970104 Expanding Knowledge in the Earth Sciences 970106 Expanding Knowledge in the Biological Sciences |
Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article School of Environmental and Rural Science |
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