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Studies in the Area of Entomology Reported from Natural History Museum [Molecular phylogeny of the pond skaters (Gerrinae), discussion of the fossil...

September 2, 2014



Studies in the Area of Entomology Reported from Natural History Museum [Molecular phylogeny of the pond skaters (Gerrinae), discussion of the fossil record and a checklist of species assigned to the subfamily (Hemiptera: Heteroptera: Gerridae)]

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators discuss new findings in Life Science Research. According to news reporting originating in Vienna, Austria, by NewsRx journalists, research stated, "The phylogenetic relationships among selected species and genera of Gerrinae (Heteroptera: Gerridae) were investigated in a parsimony analysis of 2268 bp of DNA sequence data from the genes encoding COI + II, 16S rRNA and 28S rRNA. The taxa represented 12 of 15 recognized genera of Gerrinae and with outgroup taxa from all other subfamilies of Gerridae, including three of five recognized genera of Eotrechinae, which is considered the sister-group of Gerrinae."

The news reporters obtained a quote from the research from Natural History Museum, "The resulting phylogeny shows that Gerrinae is not monophyletic, since a clade comprising Gerris, Aquarius, Limnoporus, Tachygerris, Eurygerris and Gigantometra is more closely related to representatives of the subfamily Eotrechinae than to a clade comprising Limnogonus, Neogerris, Limnometra, Tenagogerris and Tenagogonus. The two currently recognized gerrine tribes, Tachygerrini and Gerrini, were also paraphyletic, since Eurygerris was sister-group to Gigantometra, while Tachygerris was sister-group to Limnoporus + Aquarius + Gerris. Limnogonus and Neogerris were found to be strongly supported sister-taxa, and their sister-group was a clade comprising Limnometra, Tenagogerris and Tenagogonus, none of which were monophyletic. Finally, Aquarius chilensis (Berg, 1881) was sister-group to a clade comprising Aquarius amplus (Drake & Harris, 1938), A. remigis (Say, 1832) and A. remigoides (Gallant & Fairbairn, 1993), recognized as the A. remigis species group, and the entire clade was sister-group to Gerris. Based on the phylogenetic reconstruction, we outline possible diagnostic character combinations for a future revision of the Gerrinae and discuss the fossil record. While some of the relationships reinstate earlier ideas, e.g., Limnogonus and Neogerris being sister groups, many others are poorly supported and poorly diagnosed, and therefore, we retain from drawing taxonomic conclusions until data is available from the remaining genera, which can support a future generic revision of the Gerrinae."

According to the news reporters, the research concluded: "The updated checklist of species assigned to the subfamily is therefore based on the established taxonomy."

For more information on this research see: Molecular phylogeny of the pond skaters (Gerrinae), discussion of the fossil record and a checklist of species assigned to the subfamily (Hemiptera: Heteroptera: Gerridae). Insect Systematics & Evolution, 2014;45(3):251-281. Insect Systematics & Evolution can be contacted at: Brill Academic Publishers, Plantijnstraat 2, P O Box 9000, 2300 Pa Leiden, Netherlands (see also Life Science Research).

Our news correspondents report that additional information may be obtained by contacting J. Damgaard, Nat Hist Museum Vienna, Dept. of Entomol, A-1010 Vienna, Austria. Additional authors for this research include F.F.F. Moreira, T.A. Weir and H. Zettel.

Keywords for this news article include: Vienna, Europe, Austria, Life Science Research

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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