New Jurassic Ammonitina from New Zealand: Bathonian-Callovian Eurycephalitinae

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dc.contributor.author Westermann, G.E.G. en
dc.contributor.author Hudson, N. en
dc.contributor.author Grant-Mackie, J. en
dc.date.accessioned 2009-08-25T06:03:01Z en
dc.date.available 2009-08-25T06:03:01Z en
dc.date.issued 2002 en
dc.identifier.citation New Zealand Journal of Geology and Geophysics 45 (4), 499-525. 2002 en
dc.identifier.issn 0028-8306 en
dc.identifier.other eid=2-s2.0-0036964493 en
dc.identifier.uri http://hdl.handle.net/2292/4878 en
dc.description An open access copy of this article is available from the publishers website. en
dc.description.abstract Several new ammonite assemblages are described from the uppermost Temaikan and basal Heterian regional stages of New Zealand, Auckland Province, consisting mainly of the east Pacific Eurycephalitinae (Family Sphaeroceratidae). Four successive faunas are distinguished in the upper Awakino valley: All include the Andean genus Araucanites, here occurring with both sex-morphs. Fauna 1 includes Araucanites awakino n. sp., Iniskinites cf. crassus Riccardi and Westermann, and Xenocephalites grantmackiei Westermann and Hudson ?/m x Lilloettia aff. steinmanni (Spath) ?/M-latest Bathonian; Fauna 2 includes Araucanites postawakino n. sp. and Xenocephalites cf. stipanicici Riccardi et al.-Early/earliest Callovian; Fauna 3 with Araucanites ponganui n. sp., Iniskinites gr. cepoides (Whiteaves), and Choffatia gr. furcula (Neumayr)-Early Callovian; Fauna 4 with Araucanites spellmani n. sp.-? Middle Callovian. The Oraka Sandstone at Kawhia Harbour is now placed entirely in the uppermost Bathonian and Lower Callovian (i.e., with Faunas 1 and 2). Ammonities previously identified with Kimmeridgian taxa-that is, "Epimayaites", "Epicephalites", and "Subneumayria"-are now classified as microconchs of Araucanites and with macroconchs of Lilloettia and Iniskinites. The superjacent Ohineruru Formation contains a typically Indo-Pacific fauna of Late Oxfordian to Early Kimmeridgian age, based on Sulaites heteriensis (Stevens) [ex Idoceras], a close relative of S. gerthi Oloriz and Westermann from New Guinea, and, above, Paraboliceras macnaughti (Stevens) [ex Kossmatia]. The interval Upper Callovian to Middle Oxfordian cannot be documented by ammonites in New Zealand, suggesting a hiatus between Oraka and Ohineruru Formations, marked by the Captain King's Shellbed. Other useful index fossils are forms of the bivalve Retroceramus. The first occurrence of R. galoi (Boehm) defines the base of the Heterian regional stage, but its New Zealand occurrence is much earlier than in Indonesia (Middle Oxfordian). Furthermore, first occurrence is diachronous according to ammonite biostratigraphy even in Auckland Province, that is, between Faunas 3 and 4 in Awakino valley and in Fauna 2 at Kawhia Harbour. Regional and local facies control is indicated. On the other hand, Fauna 2 includes R. stehni Damborenea known from the Early/earliest Callovian of the Andes. en
dc.publisher Royal Society Of New Zealand en
dc.relation.ispartofseries New Zealand Journal of Geology and Geophysics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/0028-8306/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.source.uri http://www.royalsociety.org.nz/publications/journals/nzjg/2002/031 en
dc.title New Jurassic Ammonitina from New Zealand: Bathonian-Callovian Eurycephalitinae en
dc.type Journal Article en
dc.subject.marsden Fields of Research::260000 Earth Sciences::260100 Geology en
pubs.issue 4 en
pubs.begin-page 499 en
pubs.volume 45 en
dc.rights.holder Copyright: Royal Society of New Zealand en
pubs.end-page 525 en


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