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†Protacanthodiscus Trechmann 1923
urn:lsid:organismnames.com:name:3599690
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†Protacanthodiscus Trechmann 1923
Trechmann 1923. The Jurassic rocks of New Zealand. With an appendix on ammonites from New Zealand by Leonard Frank Spath, D.Sc, F.G.S. Quarterly Journal of the Geological Society of London, 79 1923: pp. 246-312