Journal article

Publication year: 2019

Pages: 876-889

Journal: Biological Journal of the Linnean Society

Volume number: 127

Issue number: 4

ISSN: 0024-4066

Open access status: Bronze

DOI Link: https://doi.org/10.1093/biolinnean/blz040

Publisher: Oxford University Press

Abstract: 
The history of the currently disjunct temperate rainforests of the Pacific Northwest of North America has shaped the evolution and diversity of endemics. This study focuses on how geological and climatic perturbations have driven speciation in the area by isolating lineages. We investigated the phylogenetic relationships and historical biogeography of the endemic jumping slugs (genus Hemphillia) using a multi-locus phylogeny. We evaluated the spatial distribution and divergence times of major lineages, generated ancestral area probabilities and inferred the biogeographical history of the genus. Our study revealed eight genetic lineages that formed three clades: one clade consisting of two Coast/Cascade lineages, and two reciprocally monophyletic clades that each contain a Coast/Cascade and two Rocky Mountains taxa. The results of the biogeographical analysis suggest that the ancestral range of the genus occupied Coast/Cascade habitats and then spread across into Northern Rocky Mountain interior habitats with subsequent fragmentations isolating coastal and inland lineages. Finally, there have been more recent speciation events among three lineage pairs that have shaped shallow structures of all clades. We add to our knowledge of the biogeographical history of the region in that we discovered diversification and speciation events that have occurred in ways more complex than previously thought.

Harvard Citation style: Rankin, A., Wilke, T., Lucid, M., Leonard, W., Espindola, A., Smith, M., et al. (2019) Complex interplay of ancient vicariance and recent patterns of geographical speciation in north-western North American temperate rainforests explains the phylogeny of jumping slugs (Hemphillia spp.), Biological Journal of the Linnean Society, 127(4), pp. 876-889. https://doi.org/10.1093/biolinnean/blz040

APA Citation style: Rankin, A., Wilke, T., Lucid, M., Leonard, W., Espindola, A., Smith, M., Carstens, B., & Sullivan, J. (2019). Complex interplay of ancient vicariance and recent patterns of geographical speciation in north-western North American temperate rainforests explains the phylogeny of jumping slugs (Hemphillia spp.). Biological Journal of the Linnean Society. 127(4), 876-889. https://doi.org/10.1093/biolinnean/blz040