globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.01.001
论文题名:
Did the giant extinct shark Carcharocles megalodon target small prey? Bite marks on marine mammal remains from the late Miocene of Peru
作者: Collareta A.; Lambert O.; Landini W.; Di Celma C.; Malinverno E.; Varas-Malca R.; Urbina M.; Bianucci G.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 469
起始页码: 84
结束页码: 91
语种: 英语
英文关键词: Co-extinction ; Megatooth shark ; Piscobalaena nana ; Predation ; Scavenging ; Shark bite marks
英文摘要: We report on bite marks incising fossil mammal bones collected from upper Miocene deposits of the Pisco Formation exposed at Aguada de Lomas (southern Peru) and attributed to the giant megatooth shark Carcharocles megalodon. The bitten material includes skull remains referred to small-sized baleen whales as well as fragmentary cetacean and pinniped postcrania. These occurrences, the first in their kind from the Southern Hemisphere, significantly expand the still scarce record of bite marks for C. megalodon; moreover, for the first time a prey (or scavenging item) of C. megalodon is identified at the species level (as Piscobalaena nana, a diminutive member of the extinct mysticete family Cetotheriidae). Due to the fragmentary nature of the studied material, the exact origin of the detected marks (i.e., by scavenging or by active predation) cannot be ascertained. Nevertheless, relying on actualistic observations and size-based considerations, we propose that diminutive mysticetes (e.g., cetotheriids) were some of the target prey of adult C. megalodon, at least along the coast of present-day Peru. C. megalodon is thus here interpreted as an apex predator whose trophic spectrum was focused on relatively small-sized prey. Lastly, we propose a link between the recent collapse of various lineages of diminutive mysticetes (observed around 3 Ma) and the extinction of C. megalodon (occurring around the end of the Pliocene). © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67944
Appears in Collections:过去全球变化的重建

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作者单位: Dipartimento di Scienze della Terra, Università di Pisa, Pisa, Italy; Dottorato Regionale in Scienze della Terra Pegaso, Pisa, Italy; D.O. Terre et Histoire de la Vie, Institut Royal des Sciences Naturelles de Belgique, Brussels, Belgium; Scuola di Scienze e Tecnologie, Università di Camerino, Camerino, Italy; Dipartimento di Scienze dell'Ambiente e del Territorio e di Scienze della Terra, Università di Milano Bicocca, Milano, Italy; Departamento de Paleontologia de Vertebrados, Museo de Historia Natural-UNMSM, Lima, Peru

Recommended Citation:
Collareta A.,Lambert O.,Landini W.,et al. Did the giant extinct shark Carcharocles megalodon target small prey? Bite marks on marine mammal remains from the late Miocene of Peru[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,469
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