Larrain, A. P. & Biró-Bagóczky, L. 1985. New Pygurus (Echinodermata: Echinoidea) from the Tithonian of central Chile: first record from the Jurassic of the Southern Hemisphere. Journal of Paleontology 59, 1409-1413.
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Larrain, A. P.; Biró-Bagóczky, L.
1985
New Pygurus (Echinodermata: Echinoidea) from the Tithonian of central Chile: first record from the Jurassic of the Southern Hemisphere