Iserosaurus is an extinct genus of sea turtle from the Late Cretaceous of Czech Republic.
Taxonomy Iserosaurus was originally described as a new taxon of mosasauroid by Fritsch (1905) on the basis of a disarticulated skeleton from Turonian-age chalk deposits in Bohemia, Czech Republic.FRITSCH, A. 1905a. Synopsis der Saurier der böhm. Kreideformation. Sitzungsberichte der Königlich Böhmischen Gesellschaft derWissenschaften, Classe MathematischNaturwissenschaftliche 1905(8), 1–7.FRITSCH, A. 1905b. Vorläufige Notiz über Miscellanea palaeontologica aus Böhmen und America. Sitzungsberichte der Königlich Böhmischen Gesellschaft der Wissenschaften, Classe MathematischNaturwissenschaftliche 21, 1–3. However, Persson (1963) tentatively listed it as a dubious plesiosaur in his overview of plesiosaur classification.PERSSON, P. O. 1963. A revision of the classification of the Plesiosauria with a synopsis of the stratigraphical and geographical distribution of the group. Lunds Universitet Årsskrift 65, 1–23. Karl (2002) recognized Iserosaurus as being a protostegid turtle and assigned it to cf. Archelon.KARL, H.-V. 2002. Übersicht über die fossilen marinen Schildkrötenfamilien Zentraleuropas (Reptilia, Testudines). Mauritiana (Altenburg) 18, 171–202. Kear et al. (2013) agreed with Karl (2002) that Iserosaurus is a marine turtle but noted differences from Archelon, so assigned the genus to Protostegidae indet.Kear, B.P., Ekrt, B., Prokop, J. & Georgalis, G.L. (2014) Turonian marine amniotes from the Bohemian Cretaceous Basin, Czech Republic. Geological Magazine, 151, 183–198.https://doi.org/10.1017/S0016756813000502
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