A ‘Collins’ monster’-type lobopodian from the Emu Bay Shale Konservat-Lagerstätte (Cambrian), South Australia

Abstract

García-Bellido, D.C., Edgecombe, G.D., Paterson, J.R. & Ma, X. 2013. A ‘Collins’ monster’-type lobopodian from the Emu Bay Shale Konservat-Lagerstätte (Cambrian), South Australia. Alcheringa 37, 1–5. ISSN 0311-5518.

A distinctive group of lobopodians known from Cambrian Stage 5 in western Laurentia includes Acinocricus Conway Morris & Robison, 1988, from the Spence Shale in Utah, and an unnamed species from the Burgess Shale, British Columbia, popularly known as ‘Collins’ monster’. The temporal gap from their closest relative, the Chengjiang lobopodian Luolishania, is bridged by a single, incomplete specimen of a Collins’ monster-type lobopodian from the Emu Bay Shale (Cambrian Series 2, Stage 4), Kangaroo Island, South Australia, the first lobopodian discovered in this Konservat-Lagerstätte. Pending formal description of the Burgess Shale species, the Australian specimen is left unassigned to a genus.

Diego C. García-Bellido [[email protected]], Sprigg Geobiology Centre, School of Earth and Environmental Sciences, University of Adelaide, South Australia 5005, Australia and South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia; Gregory D. Edgecombe [[email protected]], Xiaoya Ma [[email protected]], Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK; John R. Paterson [[email protected]], Division of Earth Sciences, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia. Received 8.1.2013; revised 28.3.2013; accepted 2.4.2013.

南澳鹬鹋海湾页岩Konservat-Lagerstätte (寒武纪) 中的“克林魔鬼”-型叶足动物

劳亚大陆西部寒武纪第五期的一个独特的叶足动物类群包括:犹他Spence页岩中的Acinocricus Conway, Morris & Robison, 1988和不列颠哥伦比亚布尔吉斯页岩中的一个未命名种, 即有名的“克林魔鬼”。它们与亲缘关系最近的分子澄江叶足动物Luolishania之间的时间间断由南澳袋鼠岛鹬鹋海湾页岩 (寒武纪Series2, Stage 4) 中的单一且不完整的克林魔鬼-型叶足动物所填充。这是在Konservat-Lagerstätte发现的第一个叶足动物化石。

Key words:

• Lobopodia
• Xenusia
• Acinocricus
• Luolishania
• Gondwana

Acknowledgements

Fieldwork was funded by grants from the Australian Research Council (LP0774959, DP120104251), Spanish Ministry of Science (RYC2007-00090, CGL2009-07073), and National Geographic Society Research & Exploration (#8991-11), with additional financial assistance from Beach Energy Ltd and the South Australian Museum, while SeaLink have provided logistical support. We are grateful to the Buck family for access to the field area, in addition to our Emu Bay Shale research collaborators, J. Gehling, J. Jago and M. Lee, for advice and support. We would especially like to thank M. Binnie, R. Atkinson, M. Gemmell, N. Schroeder and an army of other friends and colleagues for their assistance in the field and lab.