Description of Systenobythere gen. nov. (Ostracoda, Crustacea) from the late Miocene of southeastern Australia with comments on its problematical taxonomic and palaeoecological affinities

Abstract

Warne, M.T. & Whatley, R.C. iFirst article. Description of Systenobythere gen. nov. (Ostracoda, Crustacea) from the late Miocene of southeastern Australia with comments on its problematical taxonomic and palaeoecological affinities. Alcheringa, 1–8. ISSN 0311-5518.

A new ostracod genus and species, Systenobythere archboldi, is described from late Miocene open neritic strata of southeastern Australia. Specimens occur in argillaceous glauconitic sands deposited in offshore continental shelf settings that were periodically influenced by coastal upwelling. Systenobythere archboldi possesses an adductor muscle scar pattern typical of the Bythocytheridae, but has a pentodont hinge and sieve-type normal pore canals atypical of this family.

本文描述了澳大利亚东南部中新世晚期开阔浅海地层中的介形虫的一个新属种Systenobythere archboldi。标本出现于泥质海绿石砂中。该沉积物沉积于受海岸上涌流影响的远岸陆架环境。Systenobythere archboldi具有典型的Bythocytheridae科的收缩肌痕, 但它的五齿铰及筛型垂直毛细管并不是该科的典型特征。

Key words:

• Systenobythere
• Bythocytheridae
• Ostracoda
• Miocene
• Australia
• palaeoecology

Acknowledgements

Mark Warne acknowledges support for this work from the Environmental Sustainability Faculty of Science and Technology Research Cluster (FRC) at Deakin University. Museum Victoria is thanked for access to Nepean 1 borehole materials. The Natural History Museum, London is thanked for the loan of comparative material of Bythocythere tuberculata Chapman, 1910 used for this study. Robin Whatley thanks his wife Caroline Maybury for her great assistance and support and Mary for her constant inspiration. Tatsuhiko Yamaguchi and Irene Zorn are thanked for their reviews of the original manuscript of this paper.