Answers are grounded in this paper and cite their sources.
Two Miocene fossil scales, 20–15 million years old, are reported from Ban‐nockburn, near Cromwell in Central Otago. Their explicit identity cannot be determined, but they appear to be from a perciform, perhaps a percichthyid, family of basal perciform fishes widely present in southern cool‐temperate lands. Whatever their identity, the scales came from a fish species not formerly reported from New Zealand fresh waters and they therefore indicate former, unrecognised diversity in the fauna.
No takes yet. Share an insight, caveat, or question.
McDowall et al. (2005) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: