Ice ages and butterflyfishes: Phylogenomics elucidates the ecological and evolutionary history of reef fishes in an endemism hotspot

Joseph D. DiBattista, Michael E. Alfaro, Laurie Sorenson, John H. Choat, Jean Paul A. Hobbs, Tane H. Sinclair-Taylor, Luiz A. Rocha, Jonathan Chang, Osmar J. Luiz, Peter F. Cowman, Matt Friedman, Michael L. Berumen

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)


For tropical marine species, hotspots of endemism occur in peripheral areas furthest from the center of diversity, but the evolutionary processes that lead to their origin remain elusive. We test several hypotheses related to the evolution of peripheral endemics by sequencing ultraconserved element (UCE) loci to produce a genome-scale phylogeny of 47 butterflyfish species (family Chaetodontidae) that includes all shallow water butterflyfish from the coastal waters of the Arabian Peninsula (i.e., Red Sea to Arabian Gulf) and their close relatives. Bayesian tree building methods produced a well-resolved phylogeny that elucidated the origins of butterflyfishes in this hotspots of endemism. We show that UCEs, often used to resolve deep evolutionary relationships, represent an important tool to assess the mechanisms underlying recently diverged taxa. Our analyses indicate that unique environmental conditions in the coastal waters of the Arabian Peninsula probably contributed to the formation of endemic butterflyfishes. Older endemic species are also associated with narrow versus broad depth ranges, suggesting that adaptation to deeper coral reefs in this region occurred only recently (<1.75 Ma). Even though deep reef environments were drastically reduced during the extreme low sea level stands of glacial ages, shallow reefs persisted, and as such there was no evidence supporting mass extirpation of fauna in this region.

Original languageEnglish
Pages (from-to)10989-11008
Number of pages20
JournalEcology and Evolution
Issue number22
Publication statusPublished - Nov 2018
Externally publishedYes


  • biogeographic barriers
  • Chaetodon
  • coral reef
  • glaciation events
  • Pleistocene
  • ultraconserved elements

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