作者
Catalina Pimiento, Juan L Cantalapiedra, Kenshu Shimada, Daniel J Field, Jeroen B Smaers
发表日期
2019/3/1
期刊
Evolution
卷号
73
期号
3
页码范围
588-599
出版商
Blackwell Publishing Inc
简介
Through elasmobranch (sharks and rays) evolutionary history, gigantism evolved multiple times in phylogenetically distant species, some of which are now extinct. Interestingly, the world's largest elasmobranchs display two specializations found never to overlap: filter feeding and mesothermy. The contrasting lifestyles of elasmobranch giants provide an ideal case study to elucidate the evolutionary pathways leading to gigantism in the oceans. Here, we applied a phylogenetic approach to a global dataset of 459 taxa to study the evolution of elasmobranch gigantism. We found that filter feeders and mesotherms deviate from general relationships between trophic level and body size, and exhibit significantly larger sizes than ectothermic-macropredators. We confirm that filter feeding arose multiple times during the Paleogene, and suggest the possibility of a single origin of mesothermy in the Cretaceous. Together …
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C Pimiento, JL Cantalapiedra, K Shimada, DJ Field… - Evolution, 2019