期刊
PALAEONTOLOGY
卷 53, 期 -, 页码 377-402出版社
WILEY
DOI: 10.1111/j.1475-4983.2010.00932.x
关键词
Arthropoda; Lamellipedia; Nektaspida; Emucaris; Kangacaris; phylogeny
类别
资金
- Australian Research Council Linkage [LP0774959]
- Beach Petroleum Ltd.
- South Australian Museum
- Spanish Research Council [PA 1001105]
- Complutense University of Madrid
- Spanish Ministry of Education and Science [CGL 2006-12245BTE]
The lower Cambrian Emu Bay Shale on Kangaroo Island, South Australia, contains the only known Cambrian Burgess Shale-type biota in Australia. Two new lamellipedian arthropods, Emucaris fava gen. et sp. nov. and Kangacaris zhangi gen. et sp. nov., from the Emu Bay Shale Lagerstatte are described as monotypic genera that are resolved cladistically as a monophyletic group that is sister to Naraoiidae + Liwiidae and classified within the Nektaspida as a new family Emucarididae. Shared derived characters of Emucarididae involve a bipartite, elongate hypostome and elongation of the pygidium relative to the cephalic shield and very short thorax. A monophyletic Liwiidae is composed of Liwia and the Ordovician Tariccoia + Soomaspis but excludes Buenaspis, and even the membership of Buenaspis in Nektaspida is contradicted amongst the shortest cladograms. New morphological interpretations favour affinities of Kwanyinaspis with Conciliterga rather than with Aglaspidida, and Phytophilaspis with Petalopleura.
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