Grant-Mackie, J.A. & Yamakita, S. & Matsumoto, T. & Hori, R.S. & Takemura, A. & Aita, Y. & Takahashi, S. & Campbell, H.J. (2014)
A probable shark dorsal fin spine fragment from the Early Triassic of the Arrow Rocks sequence, Whangaroa, northern New Zealand.
New Zealand Journal of Geology and Geophysics, 57(3), 295–299 DOI: 10.1080/00288306.2014.889722