Welton, B.J. (2016)
First report of Orthechinorhinus (Squaliformes: Etmopteridae) from the Pacific Basin; a new species from Early Oligocene Rocks of Oregon, USA. New Mexico Museum of Natural History and Science, Bulletin, 74, 303–308
Flammensbeck, C.K. & Pollerspöck, J. & Schedel, F.D.B. & Matzke, N.J. & Straube, N. (2018)
Of teeth and trees: A fossil tip-dating approach to infer divergence times of extinct and extant squaliform sharks. Zoologica Scripta, 47(5), 539–557
DOI: 10.1111/zsc.12299