Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela

Guinot, Guillaume; Carrillo-Briceño, Jorge D.

doi:10.1016/j.cretres.2017.09.021

Cited by 12 publications

(15 citation statements)

References 49 publications

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“…The low diversity, low number of species per family, and strong morphological and ecological disparity have often been used to characterize living lamniform species as representatives of relict clade that was once speciose and subsequently experienced a diversity decline during their evolutionary history (21,23,24), but that has not yet been demonstrated and understood. Drivers of their diversification dynamics and decline are unknown but have…”

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confidence: 99%

Climate cooling and clade competition likely drove the decline of lamniform sharks

Condamine

Romieu

Guinot

2019

Proc. Natl. Acad. Sci. U.S.A.

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Understanding heterogeneity in species richness between closely related clades is a key research question in ecology and evolutionary biology. Multiple hypotheses have been proposed to interpret such diversity contrasts across the tree of life, with most studies focusing on speciation rates to explain clades’ evolutionary radiations, while often neglecting extinction rates. Here we study a notorious biological model as exemplified by the sister relationships between mackerel sharks (Lamniformes, 15 extant species) and ground sharks (Carcharhiniformes, ∼290 extant species). Using a comprehensive fossil dataset, we found that the diversity dynamics of lamniforms waxed and waned following repeated cycles of radiation phases and declining phases. Radiation phases peaked up to 3 times the current diversity in the early Late Cretaceous. In the last 20 million years, the group declined to its present-day diversity. Along with a higher extinction risk for young species, we further show that this declining pattern is likely attributed to a combination of abiotic and biotic factors, with a cooling-driven extinction (negative correlation between temperature and extinction) and clade competition with some ground sharks. Competition from multiple clades successively drove the demise and replacement of mackerel sharks due to a failure to originate facing the rise of ground sharks, particularly since the Eocene. These effects came from ecologically similar carcharhiniform species inhibiting diversification of medium- and large-sized lamniforms. These results imply that the interplay between abiotic and biotic drivers had a substantial role in extinction and speciation, respectively, which determines the sequential rise and decline of marine apex predators.

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confidence: 99%

Climate cooling and clade competition likely drove the decline of lamniform sharks

Condamine

Romieu

Guinot

2019

Proc. Natl. Acad. Sci. U.S.A.

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“…The fossil record of Cretaceous chondrichthyans from northern South America is poorly known with only few remains of lamniforms and ptychodonts from Colombia (Reinhart, 1951;Brito and Janvier, 2002;Carrillo-Briceño et al, 2016) and Venezuela (Moody and Maisey, 1994;Carrillo-Briceño, 2009Carrillo-Briceño et al, 2008;Carrillo-Briceño and Lucas, 2013;Guinot and Carrillo-Briceño 2018). Here we describe a piece of an articulated tooth set of †Protolamna ricaurtensis sp.…”

Section: Introductionmentioning

confidence: 92%

“…Overall, the Cretaceous record of lamniform sharks is well known, mostly from the Northern Hemisphere (e.g., Europe and North America, see Cappetta 2012), as these regions have been extensively studied since the 19th century. On the contrary, the fossil record of lamniform sharks in South America is represented exclusively by isolated dental elements of at least nine genera from the Upper Cretaceous of Argentina (Arratia and Cione, 1996;Bogan and Agnolin, 2010;Prámparo et al, 2013;Schroeter et al, 2014), Brazil (Maury, 1930;Oliveira, 1954;Rebouças and Silva Santos, 1956), Chile (Otero et al, 2013) and Venezuela (Moody and Maisey, 1994;Carrillo-Briceño et al, 2008;Guinot and Carrillo-Briceño 2018). Only few Lower Cretaceous records of lamniforms are known, such as †Priscusurus adruptodontus Kriwet, 2006, from the middle?…”

Section: Introductionmentioning

confidence: 99%

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A new lamniform shark Protolamna ricaurtei sp. nov. from the Lower Cretaceous of Colombia

Carrillo-Briceño

Parra²,

Luque

2019

Cretaceous Research

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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 set is the only known for the family †Pseudoscapanorhynchidae, and possibly the oldest in its type for a lamniform from the Lower Cretaceous. Our findings offer new insights in to the lamniform paleodiversity of the northwestern margin of Gondwana during the Lower Cretaceous.

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“…The vertebrae of Lunaophis aquaticus were found exposed in a quarry of the Cementos Andinos company, 10 km northeast of Monay city (9°36.57' 06"N, 70°24'14"W), Municipo Candelaria, Trujillo State, Venezuela (Albino et al 2017). The fossils come from strata corresponding to the La Aguada Member of the La Luna Formation (Albino et al 2017;Guinot and Carrillo-Briceño 2018). A Cenomanian age for the La Aguada Member was determined by planktonic foraminifera and ammonites (Renz 1959).…”

Section: Geological Settingmentioning

confidence: 99%

Spondyloarthropathy in vertebrae of the aquatic Cretaceous snake Lunaophis aquaticus, and its first recognition in modern snakes

Albino

Rothschild

Carrillo-Briceño

et al. 2018

Sci Nat

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Arthritis is documented for the first time in snakes. Ossification of the intervertebral capsule and zygapophyseal joints resulting in segmental vertebral fusion was observed in the aquatic Cretaceous snake Lunaophis aquaticus. Such pathologic alterations are pathognomonic for the spondyloarthropathy form of inflammatory arthritis. The alterations are easily distinguished from vertebral fractures because of the absence of collapse and from osteomyelitis and neoplasia because of absence of destructive changes and reactive new bone formation. A survey of 2144 snakes in recent collections, performed to identify Holocene prevalence, revealed only two occurrences in extant snakes. The findings in Bitis gabonica and Elaphe taeniura were indistinguishable from those noted in Lunaophis aquaticus and identical to those previously recognized in modern varanids. The pathology likely represents a form of reactive arthritis related to enteropathic infection. While the 2 disease probably did not affect general locomotion, its vertebral column position may have compromised mating.

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Lamniform sharks from the Cenomanian (Upper Cretaceous) of Venezuela

Cited by 12 publications

References 49 publications

Climate cooling and clade competition likely drove the decline of lamniform sharks

Climate cooling and clade competition likely drove the decline of lamniform sharks

A new lamniform shark Protolamna ricaurtei sp. nov. from the Lower Cretaceous of Colombia

Spondyloarthropathy in vertebrae of the aquatic Cretaceous snake Lunaophis aquaticus, and its first recognition in modern snakes

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