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Photic niche invasions: phylogenetic history of the dim-light foraging augochlorine bees (Halictidae)

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dc.contributor.author Tierney, Simon M. en
dc.contributor.author Sanjur, Oris I. en
dc.contributor.author Grajales, Grethel G. en
dc.contributor.author Santos, Leandro M. en
dc.contributor.author Bermingham, Eldredge en
dc.contributor.author Wcislo, William T. en
dc.date.accessioned 2012-04-25T17:42:16Z
dc.date.available 2012-04-25T17:42:16Z
dc.date.issued 2012
dc.identifier.citation Tierney, Simon M., Sanjur, Oris I., Grajales, Grethel G., Santos, Leandro M., Bermingham, Eldredge, and Wcislo, William T. 2012. "<a href="https://repository.si.edu/handle/10088/18372">Photic niche invasions: phylogenetic history of the dim-light foraging augochlorine bees (Halictidae)</a>." <em>Proceedings of the Royal Society B: Biological Sciences</em>, 279, (1729) 794–803. <a href="https://doi.org/10.1098/rspb.2011.1355">https://doi.org/10.1098/rspb.2011.1355</a>. en
dc.identifier.issn 0962-8452
dc.identifier.uri http://hdl.handle.net/10088/18372
dc.description.abstract Most bees rely on flowering plants and hence are diurnal foragers. From this ancestral state, dim-light foraging in bees requires significant adaptations to a new photic environment. We used DNA sequences to evaluate the phylogenetic history of the most diverse clade of Apoidea that is adapted to dim-light environments (Augochlorini: Megalopta, Megaloptidia and Megommation). The most speciose lineage, Megalopta, is distal to the remaining dim-light genera, and its closest diurnal relative (Xenochlora) is recovered as a lineage that has secondarily reverted to diurnal foraging. Tests for adaptive protein evolution indicate that long-wavelength opsin shows strong evidence of stabilizing selection, with no more than five codons (2%) under positive selection, depending on analytical procedure. In the branch leading to Megalopta, the amino acid of the single positively selected codon is conserved among ancestral Halictidae examined, and is homologous to codons known to influence molecular structure at the chromophore-binding pocket. Theoretically, such mutations can shift photopigment ?max sensitivity and enable visual transduction in alternate photic environments. Results are discussed in light of the available evidence on photopigment structure, morphological specialization and biogeographic distributions over geological time. en
dc.relation.ispartof Proceedings of the Royal Society B: Biological Sciences en
dc.title Photic niche invasions: phylogenetic history of the dim-light foraging augochlorine bees (Halictidae) en
dc.type Journal Article en
dc.identifier.srbnumber 109573
dc.identifier.doi 10.1098/rspb.2011.1355
rft.jtitle Proceedings of the Royal Society B: Biological Sciences
rft.volume 279
rft.issue 1729
rft.spage 794
rft.epage 803
dc.description.SIUnit STRI en
dc.citation.spage 794
dc.citation.epage 803


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