Pancrustacean Evolution Illuminated by Taxon-Rich Genomic-Scale Data Sets with an Expanded Remipede Sampling

Jesus Lozano-Fernandez*, Mattia Giacomelli, James F. Fleming, Albert Chen, Jakob Vinther, Philip Francis Thomsen, Henrik Glenner, Ferran Palero, David A Legg, Thomas M. Iliffe, Davide Pisani, Jørgen Olesen

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

The relationships of crustaceans and hexapods (Pancrustacea) have been much discussed and partially elucidated following the emergence of phylogenomic data sets. However, major uncertainties still remain regarding the position of iconic taxa such as Branchiopoda, Copepoda, Remipedia, and Cephalocarida, and the sister group relationship of hexapods. We assembled the most taxon-rich phylogenomic pancrustacean data set to date and analyzed it using a variety of methodological approaches. We prioritized low levels of missing data and found that some clades were consistently recovered independently of the analytical approach used. These include, for example, Oligostraca and Altocrustacea. Substantial support was also found for Allotriocarida, with Remipedia as the sister of Hexapoda (i.e., Labiocarida), and Branchiopoda as the sister of Labiocarida, a clade that we name Athalassocarida (="nonmarine shrimps"). Within Allotriocarida, Cephalocarida was found as the sister of Athalassocarida. Finally, moderate support was found for Hexanauplia (Copepoda as sister to Thecostraca) in alliance with Malacostraca. Mapping key crustacean tagmosis patterns and developmental characters across the revised phylogeny suggests that the ancestral pancrustacean was relatively short-bodied, with extreme body elongation and anamorphic development emerging later in pancrustacean evolution.

Original languageEnglish
Article numberevz097
Pages (from-to)2055-2070
Number of pages16
JournalGenome Biology and Evolution
Volume11
Issue number8
DOIs
Publication statusPublished - 4 Jul 2019

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Keywords

  • crustacean phylogeny
  • Dayhoff recoding
  • Pancrustacea
  • remipedes
  • transcriptomics

Cite this

Lozano-Fernandez, J., Giacomelli, M., Fleming, J. F., Chen, A., Vinther, J., Thomsen, P. F., Glenner, H., Palero, F., Legg, D. A., Iliffe, T. M., Pisani, D., & Olesen, J. (2019). Pancrustacean Evolution Illuminated by Taxon-Rich Genomic-Scale Data Sets with an Expanded Remipede Sampling. Genome Biology and Evolution, 11(8), 2055-2070. [evz097]. https://doi.org/10.1093/gbe/evz097