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Giant boin snake from a Paleocene Neotropical reveal hotter past equatorial temperatures

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dc.creatorHead,Jason Jspa
dc.creatorBloch, Jonathan Ispa
dc.creatorHastings, Alexander Kspa
dc.creatorBourque, Jason Rspa
dc.creatorCadena, Edwin Alberto
dc.creatorHerrera, Fabiany Aspa
dc.creatorPolly, P Davidspa
dc.creatorJaramillo, Carlos Aspa
dc.date.accessioned2020-08-19T14:43:50Z
dc.date.available2020-08-19T14:43:50Z
dc.date.created2009-02-05spa
dc.description.abstractThe largest extant snakes live in the tropics of South America and southeast Asia1,2,3 where high temperatures facilitate the evolution of large body sizes among air-breathing animals whose body temperatures are dependant on ambient environmental temperatures (poikilothermy)4,5. Very little is known about ancient tropical terrestrial ecosystems, limiting our understanding of the evolution of giant snakes and their relationship to climate in the past. Here we describe a boid snake from the oldest known neotropical rainforest fauna from the Cerrejón Formation (58–60 Myr ago) in northeastern Colombia. We estimate a body length of 13?m and a mass of 1,135?kg, making it the largest known snake6,7,8,9. The maximum size of poikilothermic animals at a given temperature is limited by metabolic rate4, and a snake of this size would require a minimum mean annual temperature of 30–34?°C to survive. This estimate is consistent with hypotheses of hot Palaeocene neotropics with high concentrations of atmospheric CO2 based on climate models10. Comparison of palaeotemperature estimates from the equator to those from South American mid-latitudes indicates a relatively steep temperature gradient during the early Palaeogene greenhouse, similar to that of today. Depositional environments and faunal composition of the Cerrejón Formation indicate an anaconda-like ecology for the giant snake, and an earliest Cenozoic origin of neotropical vertebrate faunas.eng
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1038/nature07671
dc.identifier.issnISSN: 0028-0836
dc.identifier.issnEISSN: 1476-4687
dc.identifier.urihttps://repository.urosario.edu.co/handle/10336/27779
dc.language.isoengspa
dc.publisherNature Publishing Groupspa
dc.publisherSpringer Naturespa
dc.relation.citationEndPage717
dc.relation.citationIssueNo. 7230
dc.relation.citationStartPage715
dc.relation.citationTitleNature, Nature: New biology
dc.relation.citationVolumeVol. 457
dc.relation.ispartofNature, Nature: New biology, ISSN: 0028-0836;EISSN: 1476-4687, Vol.457, No.7230 (05 February 2009); pp.715–717spa
dc.relation.urihttps://www.nature.com/articles/nature07671spa
dc.rights.accesRightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.accesoRestringido (Acceso a grupos específicos)spa
dc.sourceNature, Nature: New biologyspa
dc.source.instnameinstname:Universidad del Rosario
dc.source.reponamereponame:Repositorio Institucional EdocUR
dc.subject.keywordAnimalsspa
dc.subject.keywordAtmosphere / chemistryspa
dc.subject.keywordBiological evolutionspa
dc.subject.keywordBody Sizespa
dc.subject.keywordBody temperature regulationspa
dc.subject.keywordBoidae and anatomy & histologyspa
dc.subject.keywordBoidae metabolismspa
dc.subject.keywordCarbon Dioxide / analysisspa
dc.subject.keywordColombiaspa
dc.subject.keywordEnergy metabolismspa
dc.subject.keywordFossilsspa
dc.subject.keywordHistoryspa
dc.subject.keywordancientspa
dc.subject.keywordTemperaturespa
dc.subject.keywordTropical climatespa
dc.titleGiant boin snake from a Paleocene Neotropical reveal hotter past equatorial temperaturesspa
dc.title.TranslatedTitleUna serpiente boin gigante de un Paleoceno Neotropical revela temperaturas ecuatoriales más altas en el pasadospa
dc.typearticleeng
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.type.spaArtículospa
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