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Abstract
Hikuroa, D.C.H. & Grant-Mackie, J.A., March, 2008. New species of Late Jurassic Australobuchia (Bivalvia) from the Murihiku Terrane, Port Waikato – Kawhia region, New Zealand. Alcheringa 32, 73‐98. ISSN 0311-5518.
Five new forms of Australobuchia from New Zealand are described—two new species, A. wherowhero, A. partimlirata, and three in open nomenclature, A. sp. aff. A. partimlirata, A. sp. aff. A. plicata, and A. sp. aff. A. hochstetteri. Validity of the genus Australobuchia Zakharov, Citation1981, initially proposed for southern Buchia but not previously accepted by New Zealand workers, is confirmed. New Zealand Australobuchia in the Murihiku Terrane are Late Jurassic in age, based on ammonite, belemnite, bivalve, and palynofloral biostratigraphy. A new regional zonation is proposed using the three most common and widespread New Zealand Australobuchia—A. wherowhero sp. nov, A. hochstetteri (Fleming), and A. plicata (Zittel) in ascending stratigraphic order. Confirmation of byssal attachment for Australobuchia supports interpretation of a gregarious habit, thriving in silty to sandy substrates offshore from eastern Gondwana, on the outer shelf/upper slope.
Acknowledgements
This paper has benefited from the helpful comments of Alistair Crame and Hamish Campbell. The assistance and support of the following are gratefully acknowledged: Louise Cotterall for photography, James Crampton for database (Fossil Record File) research; past department fieldtrips have provided many of the specimens studied herein. This research was supported by a Tuapapa Putaiao Scholarship and Te Riutoto Aihe Whanau Trust grants (for Hikuroa).
