sea when the mouth was open, in order to forage, but it is also possible that they gave birth within the estuarine lake which acted as a nursery area for these species. . References Bibliography Further reading P. Y. Gagnier, S. Turner, L. Friman, M. Suarez-Riglos, and P. Janvier. 1988. The Devonian vertebrate and mollusc fauna from Seripona (Dept. of Chiquisaca, Bolivia). Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 176(2):269-297 M. Ginter, J.-C. Liao, and J. I. Valenzuela-Rios. 2008. New data on chondrichthyan microremains from the Givetian of the Renanue section in the Aragonian Pyrenees (Spain). Acta Geologica Polonica 58(2):165-172 Devonian sharks Prehistoric fish of Africa Devonian animals of Africa Devonian South Africa Fossils of South Africa Devonian fish of Europe Prehistoric fish of South America Devonian animals of South America Devonian Bolivia Fossils of Bolivia Devonian Colombia Fossils of Colombia Paleozoic Antarctica Fossil taxa described in 1982