TY - JOUR
T1 - Systematics and evolution of the whirligig beetle tribe dineutini (coleoptera
T2 - gyrinidae: gyrininae)
AU - Gustafson, Grey T.
AU - Miller, Kelly B.
N1 - Funding Information:
We are indebted to Emma Cleary who provided robust assistance in generating sequence data for the study. We wish to express our extreme gratitude to Michael Balke for the many molecular grade specimens he provided for this analysis and without his contribution the taxon sampling would not be nearly as robust. Very special thanks to the following people for providing critical and/or rare taxa for the analysis: Martin Fikáček, Jiří Hájek, Albert Deler-Hernandez, Miguel Archangelsky, Christopher Watts, Andrew E.Z. Short and last but not least Bob Sites. The following people are thanked for their excellent assistance during field-work: Christina Faris, Stephen Baca, Emma Cleary and Desi Sanchez. We thank the Center for Advanced Research Computation (CARC) at the University of New Mexico for access to their super computer cluster ‘Ulam’. Ryan Johnson (UNM, CARC) provided abundant assistance while running analyses for which we are very grateful. Kayce Bell is thanked for providing assistance while using RAxML. Johannes Bergsten is thanked for providing assistance with the MrBayes scripts. Brian and Rachael Alfaro are thanked for their assistance with the program R. Emmanuel Toussaint is thanked for advice and input on the BioGeoBEARS analyses. Very special thanks to Nick Matzke for assistance trouble-shooting BioGeoBEARS. SEM images were made possible by the KU Microscopy and Analytical Imaging Laboratory, and we are very grateful to Andrew E.Z. Short for taking the SEM images, and Heather Shinogle for her assistance during the process. We also wish to thank two anonymous reviewers and Hans Fery for greatly improving this paper during review. G.T.G was supported by the Alvin R. and Caroline G. Grove Doctoral Scholarship (UNM) and NSF grant #DEB 1402446.
Publisher Copyright:
© 2017 The Linnean Society of London.
PY - 2017/9
Y1 - 2017/9
N2 - The phylogeny and evolutionary history of the whirligig beetle tribe Dineutini are inferred from the analysis of 56 morphological characters and DNA sequence data from the mitochondrial gene fragments COI, COII and 12S, and the nuclear gene fragments H3 and arginine kinase. Bayesian and maximum likelihood analyses were performed. A Bayesian tip-dating approach was taken to provide a time-calibrated phylogenetic tree incorporating fossil taxa. Seventy-one species of extant Gyrinidae were included in the analysis, as well as two fossil taxa, representing all dineutine genera and all proposed, nonmonotypic subgenera. The resulting trees strongly support the monophyly of the Dineutini and the genera Dineutus Macleay, 1825, Macrogyrus Regimbart, 1882, Porrorhynchus Laporte, 1835 and Enhydrus Laporte, 1835. The results do not support the distinction of Andogyrus Ochs, 1924 as a separate genus, nor do they support the majority of proposed subgenera. A new classification is presented here requiring the following taxonomic changes: Andogyrus stat. nov. is relegated to a subgenus of Macrogyrus; the following subgenera are synonymized with Macrogyrus s.s. sensu nov.: Australogyrus Ochs, 1949 syn. nov., Ballogyrus Ochs, 1949 syn. nov., Clarkogyrus Ochs, 1949 syn. nov., Megalogyrus Ochs, 1949 syn. nov., Orectomimus Ochs, 1930 syn. nov. and Tribologyrus Ochs, 1949 syn nov.; the subgenus Stephanogyrus Ochs, 1955 syn. nov. is synonymized with the subgenus Cyclomimus Ochs, 1929; the genus Dineutus now includes two subgenera: Cyclous Dejean, 1833 sensu nov. and the Dineutus s.s. subgenus sensu nov.; the following subgenera are synonymized with the subgenus Cyclous: Callistodineutus Ochs, 1926 syn. nov., Paracyclous Ochs, 1926 syn. nov., Protodineutus Ochs, 1926 syn. nov. and Spinosodineutes Hatch, 1926 syn. nov.; and the following subgenera are synonymized with the Dineutus s.s. subgenus: Rhombodineutus Ochs, 1926 syn. nov. and Merodineutus Ochs, 1955 syn nov. The subgenus Rhomborhynchus Ochs, 1926 incert. sed. is tentatively moved to the genus Dineutus, without phylogenetic placement. The analysis confirms Mesodineutese Ponomarenko, 1977 is a member of the Dineutini. Each genus and subgenus is reviewed in detail with (1) a morphological diagnosis, (2) its taxonomic circumscription, including the placement of species not included in the analysis, (3) known distribution and (4) relevant discussion. A new identification key to the extant genera and subgenera of the Dineutini is provided. Finally, a biogeographic analysis reconstructing ancestral ranges was conducted revealing the historical biogeography of the tribe. The historical biogeography of the /Dineutini was found to be dominated primarily by dispersal, and we report a new transpacific disjunct distribution for members of the genus Dineutus.
AB - The phylogeny and evolutionary history of the whirligig beetle tribe Dineutini are inferred from the analysis of 56 morphological characters and DNA sequence data from the mitochondrial gene fragments COI, COII and 12S, and the nuclear gene fragments H3 and arginine kinase. Bayesian and maximum likelihood analyses were performed. A Bayesian tip-dating approach was taken to provide a time-calibrated phylogenetic tree incorporating fossil taxa. Seventy-one species of extant Gyrinidae were included in the analysis, as well as two fossil taxa, representing all dineutine genera and all proposed, nonmonotypic subgenera. The resulting trees strongly support the monophyly of the Dineutini and the genera Dineutus Macleay, 1825, Macrogyrus Regimbart, 1882, Porrorhynchus Laporte, 1835 and Enhydrus Laporte, 1835. The results do not support the distinction of Andogyrus Ochs, 1924 as a separate genus, nor do they support the majority of proposed subgenera. A new classification is presented here requiring the following taxonomic changes: Andogyrus stat. nov. is relegated to a subgenus of Macrogyrus; the following subgenera are synonymized with Macrogyrus s.s. sensu nov.: Australogyrus Ochs, 1949 syn. nov., Ballogyrus Ochs, 1949 syn. nov., Clarkogyrus Ochs, 1949 syn. nov., Megalogyrus Ochs, 1949 syn. nov., Orectomimus Ochs, 1930 syn. nov. and Tribologyrus Ochs, 1949 syn nov.; the subgenus Stephanogyrus Ochs, 1955 syn. nov. is synonymized with the subgenus Cyclomimus Ochs, 1929; the genus Dineutus now includes two subgenera: Cyclous Dejean, 1833 sensu nov. and the Dineutus s.s. subgenus sensu nov.; the following subgenera are synonymized with the subgenus Cyclous: Callistodineutus Ochs, 1926 syn. nov., Paracyclous Ochs, 1926 syn. nov., Protodineutus Ochs, 1926 syn. nov. and Spinosodineutes Hatch, 1926 syn. nov.; and the following subgenera are synonymized with the Dineutus s.s. subgenus: Rhombodineutus Ochs, 1926 syn. nov. and Merodineutus Ochs, 1955 syn nov. The subgenus Rhomborhynchus Ochs, 1926 incert. sed. is tentatively moved to the genus Dineutus, without phylogenetic placement. The analysis confirms Mesodineutese Ponomarenko, 1977 is a member of the Dineutini. Each genus and subgenus is reviewed in detail with (1) a morphological diagnosis, (2) its taxonomic circumscription, including the placement of species not included in the analysis, (3) known distribution and (4) relevant discussion. A new identification key to the extant genera and subgenera of the Dineutini is provided. Finally, a biogeographic analysis reconstructing ancestral ranges was conducted revealing the historical biogeography of the tribe. The historical biogeography of the /Dineutini was found to be dominated primarily by dispersal, and we report a new transpacific disjunct distribution for members of the genus Dineutus.
KW - anatomy
KW - aquatic beetle
KW - biogeography
KW - classification
KW - geography
KW - morphology
KW - Phylogenetics.
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U2 - 10.1093/zoolinnean/zlw014
DO - 10.1093/zoolinnean/zlw014
M3 - Article
AN - SCOPUS:85039977919
SN - 0024-4082
VL - 181
SP - 118
EP - 150
JO - Zoological Journal of the Linnean Society
JF - Zoological Journal of the Linnean Society
IS - 1
ER -