2019
DOI: 10.1016/j.cretres.2018.12.007 View full text |Buy / Rent full text
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Abstract: The Lower Cretaceous record of lamniforms from South America is scarce and poorly known, containing only two reports of isolated teeth from the upper Hauterivian of Argentina and the Albian of Peru. Here, we describe a partial articulated tooth set referable to †Protolamna ricaurtensis sp. nov. from the upper Barremian-lower Aptian deposits of the Paja Formation (Andes of Colombia). The new species corresponds to one of the oldest fossil lamniforms to date reported from South America. This articulated tooth se… Show more

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“…The fossil record of Mesozoic chondrichthyans from the northernmost part of South America is scarce and mostly represented by lamniforms and ptychodonts remains from Colombia ( Reinhart, 1951 ; Brito & Janvier, 2002 ; Carrillo-Briceño et al, 2016 ; Carrillo-Briceño, Parra & Luque, 2019 ; Niño Garcia, Parra-Mosquera & Macias-Villarraga, 2019 ) and Venezuela ( Moody & Maisey, 1994 ; Carrillo-Briceño et al, 2008 ; Carrillo-Briceño, 2009 ; Carrillo-Briceño, 2012 ; Carrillo-Briceño & Spencer, 2013 ; Guinot & Carrillo-Briceño, 2018 ), although a single report of a hybodontiform shark based on an isolated dorsal fin spine was also reported for the Rosa Blanca Fm. ( Carrillo-Briceño et al, 2016 ).…”
Section: Discussionmentioning
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“…The fossil record of Mesozoic chondrichthyans from the northernmost part of South America is scarce and mostly represented by lamniforms and ptychodonts remains from Colombia ( Reinhart, 1951 ; Brito & Janvier, 2002 ; Carrillo-Briceño et al, 2016 ; Carrillo-Briceño, Parra & Luque, 2019 ; Niño Garcia, Parra-Mosquera & Macias-Villarraga, 2019 ) and Venezuela ( Moody & Maisey, 1994 ; Carrillo-Briceño et al, 2008 ; Carrillo-Briceño, 2009 ; Carrillo-Briceño, 2012 ; Carrillo-Briceño & Spencer, 2013 ; Guinot & Carrillo-Briceño, 2018 ), although a single report of a hybodontiform shark based on an isolated dorsal fin spine was also reported for the Rosa Blanca Fm. ( Carrillo-Briceño et al, 2016 ).…”
Section: Discussionmentioning
“…However, the impact the Cretaceous Period had on this group remains unquestioned. Various basal lamniforms occurred during the Valanginian–Barremian ( Rees, 2005 ; Kriwet et al, 2008 ; CarrilloBriceño et al, 2019 ) that subsequently experienced a dramatic diversification during the Cenomanian ( Underwood, 2006 ; Guinot, 2013 ; Guinot and Cavin, 2016 ), and culminated in lamniform sharks becoming a dominant group during the Cretaceous and Palaeogene. Lamniform diversity declined during the Neogene, and 15 taxa within seven different families occur today ( Guinot and Cavin, 2016 ; Condamine et al, 2019 ).…”
Section: Introductionmentioning