Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/12994
Title: The Cambrian trilobite 'Rhyssometopus', with taxonomic revision of Guzhangian species from Queensland, Australia
Contributor(s): Hally, Lee Ann (author)
Publication Date: 2011
Handle Link: https://hdl.handle.net/1959.11/12994
Abstract: A morphometric (bivariate) analysis of middle Cambrian (Series 3; Guzhangian) species of the trilobite 'Rhyssometopus' from north-western Queensland is conducted. Results show that the species 'Rhyssometopus rhyssometopus' Öpik, 1967, 'R. princeps' Öpik, 1967, 'R. rugiceps' Öpik, 1967, and 'R. neuter' Öpik, 1967 cannot be differentiated on the basis of linear dimensions previously used by Öpik (1967) as diagnostic characters. Nonlinear characters are found to be more reliable for differentiating the species of 'Rhyssometopus'. The type species, 'R. rhyssometopus', is herein considered a senior subjective synonym of 'R. princeps' and 'R. rugiceps'. The erection of the subgenus 'Rostrifinis' is also found to be unwarranted. The occurrence of all 'Rhyssometopus' species from Australia, Antarctica and China is reviewed, and a taxonomic revision provides emended diagnoses for the following valid species: 'R. rhyssometopus' Öpik, 1967, 'R. neuter' Öpik, 1967, 'R. nitidus' Duan, 2004, 'R. rostrifinis' Öpik, 1967, 'R. thielei' (Chapman, 1911), and 'R. zhongguoensis' Zhou, 1977. The family Rhyssometopidae is also discussed, with membership consisting of the following genera: 'Rhyssometopus', 'Plectrifer', 'Qiandongaspis' and 'Tasmana'.
Publication Type: Journal Article
Source of Publication: Memoirs of the Association of Australasian Palaeontologists, v.42, p. 175-191
Publisher: Geological Society of Australia Inc
Place of Publication: Australia
ISSN: 0810-8889
Field of Research (FOR): 040308 Palaeontology (incl Palynology)
060301 Animal Systematics and Taxonomy
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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