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Observations on ponticocythereis tricristata (Brady, 1880) from the Admiralty Islands, Papua New Guinea and comments on quaternary ostracod evolution within the sw Pacific Ocean

Warne, Mark 2001, Observations on ponticocythereis tricristata (Brady, 1880) from the Admiralty Islands, Papua New Guinea and comments on quaternary ostracod evolution within the sw Pacific Ocean, Proceedings of the Royal Society of Victoria, vol. 113, no. 2, pp. 229-235.

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Title Observations on ponticocythereis tricristata (Brady, 1880) from the Admiralty Islands, Papua New Guinea and comments on quaternary ostracod evolution within the sw Pacific Ocean
Author(s) Warne, MarkORCID iD for Warne, Mark orcid.org/0000-0001-5456-191X
Journal name Proceedings of the Royal Society of Victoria
Volume number 113
Issue number 2
Start page 229
End page 235
Publisher Royal Society of Victoria
Place of publication Melbourne, Vic.
Publication date 2001
ISSN 0035-9211
Keyword(s) recent
ostracoda
Papua New Guinea
ponticocythereis tricristata
paedomorphosis
Quaternary radiation
Summary The ostracod species originally described as Cythere tricristata Brady, 1880 from the Admiralty Islands, Papua New Guinea, appears to belong to the SW Pacific and Australasian genus Ponticocythereis McKenzie, 1967 (sensu Warne & Whatley 1996). This interpretation is based on the presence of some posterior pointing scale-like spines on the carapace surface of this species. SEM images of the type material for Ponticocythereis tricristara n. comb., which are presented here for the first time, enable the clear differentiation of this species from the very similar Ponticocythereis ichthyoderma (Brady, 1890), Ponticocythereis quadriserialis (Brady, 1890) and Ponticocythereis laingensis (Wouters, 1981). As a consequence of the subdued manifestation of scale-like or blade-like spines on adult specimens of P. tricristata, this species closely resembles juvenile rather than adult specimens of some other Ponticocythereis species. This ontogenetic/phylogenetic relationship suggests that paedomorphic processes were significant in the Quaternary evolutionary radiation of Ponticocythereis species within tropical SW Pacific and Australasian regions.

Language eng
Field of Research 060399 Evolutionary Biology not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2001, Royal Society of Victoria
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001340

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.