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Huyen Dinh - One of the best experts on this subject based on the ideXlab platform.

Jakob Damgaard - One of the best experts on this subject based on the ideXlab platform.

  • water striders heteroptera gerromorpha gerridae of romania with an update on the distribution of Gerris gibbifer and g maculatus in southeastern europe
    Zootaxa, 2018
    Co-Authors: Gavril Marius Berchi, Horea Olosutean, Daniela Minodora Ilie, Jakob Damgaard, Fabio Cianferoni, Zoltan Csabai, Pal Boda, Petr Kment
    Abstract:

    The Romanian fauna comprises two species of Aquarius Schellenberg, 1800, eight species of Gerris Fabricius, 1794 and one species of Limnoporus Stal, 1868, and we hereby update the distribution and provide insights on the phenology and ecology of all eleven species in this country. We furthermore update the distribution of the two closely related species Gerris gibbifer Schummel, 1832 and G. maculatus Tamanini, 1946 in southeastern Europe. Gerris maculatus is recorded for the first time from Hungary, Montenegro and Slovenia, and the first detailed localities from Romania and Serbia are given. All bibliographic records of G. gibbifer from Romania, Macedonia and Serbia are based on misidentification and this species is thus excluded from the faunal lists of these countries. Both G. gibbifer and G. maculatus occur in Croatia, Hungary, Ukraine, and probably Slovenia.

  • Phylogeny and reclassification of species groups in Aquarius Schellenberg, Limnoporus Stål and Gerris Fabricius (Insecta: Hemiptera-Heteroptera, Gerridae)
    Systematic Entomology, 2005
    Co-Authors: Jakob Damgaard, Anthony I. Cognato
    Abstract:

    Abstract.  We investigated phylogenetic relationships of water striders (Hemiptera-Heteroptera: Gerridae) from the three principal Holarctic genera, Aquarius Schellenberg, Limnoporus Stal and Gerris Fabricius with parsimony analyses of sixty-six morphological characters and DNA sequences from mitochondrial (cytochrome c oxidase subunit I + II; large mitochondrial ribosomal subunit) and nuclear (elongation factor 1-alpha) genes. The taxon sampling included all species of Aquarius and Limnoporus, and a dense, near complete, sample of Gerris species with representatives from all subgenera and species groups, and Gigantometra gigas (China) was selected as an outgroup species. A simultaneous analysis of all data sets gave eight equally parsimonious trees, and a strict consensus tree left only a few relationships within Gerris unresolved. While Limnoporus and Gerris each were resolved as monophyletic entities, Aquarius was found to be polyphyletic, because the Nearctic Aquarius remigis-group, comprising A. remigis (Say), A. amplus (Drake and Harris), A. nyctalis (Drake and Hottes) and A. remigoides Gallant and Fairbairn, was placed as sister group to Gerris, while the Andean Aquarius chilensis (Berg) was sister group to all three genera. Remaining species of Aquarius comprised a sister group to the Gerris + the A. remigis-group clade. Based on our phylogenetic reconstruction we discuss relationships within and among the three genera, reassess and diagnose species groups, and discuss zoogeographical relationships among all taxa.

  • Phylogeny of the water strider genus Gerris Fabricius (Heteroptera: Gerridae) based on COI mtDNA, EF-1α nuclear DNA and morphology
    Systematic Entomology, 2001
    Co-Authors: Jakob Damgaard, Felix A. H. Sperling
    Abstract:

    Summary Phylogenetic relationships between water striders (Heteroptera: Gerridae) of genus Gerris Fabricius were examined using molecular and morphological characters. The molecular dataset was 820 bp DNA from the 3′ half of the mitochondrial gene encoding cytochrome oxidase subunit I and 515 bp DNA from the nuclear gene encoding elongation factor 1 alpha. The morphological dataset was a slightly modified version of a previously published dataset. Representatives from all eight recognized species groups of Gerris, as well as six species from three related genera, including Gigantometra gigas, Limnoporus esakii, L. rufoscutellatus, Aquarius najas, A. conformis and A. paludum, were included. Unweighted parsimony analyses of the COI sequences gave a topology with strong support for only those nodes that were already recognized as closely related based on morphological characters. Similar analyses of EF-1α gave a cladogram with a topology quite different from that based on morphology and COI. Unweighted parsimony analyses of the ‘total evidence’ dataset largely supports the traditional view of Gerris phylogeny. Finally, the implications of the reconstructed phylogeny in relation to biogeography and ecological phylogenetics of Gerris is discussed.

  • phylogeny of the water strider genus aquarius schellenberg heteroptera gerridae based on nuclear and mitochondrial dna sequences and morphology
    Insect Systematics & Evolution, 2000
    Co-Authors: Jakob Damgaard, Nils Moller Andersen, Felix A. H. Sperling
    Abstract:

    We examined phylogenetic relationships among gerrid water striders of the genus Aquarius Schellenberg using molecular and morphological characters. The molecular data sets included 780 bp sequence data from the mitochondrial gene encoding cytochrome oxidase subunit I (COI), and 515 bp sequence data from the nuclear gene encoding elongation factor I alpha (EF-1α). The morphological data set was a slightly modified version of a previously published data set. We included all 17 known species and one subspecies of Aquarius as well as five species from three related genera, Gigantometra gigas, Limnoporus esakii, L. rufoscutellatus, Gerris pingreensis, and G. lacustris. Unweighted parsimony analyses of the COI data set gave a single most parsimonious tree (MPT) with a topology quite similar to the morphological tree. Parsimony analyses of the EF-1α data set gave 3 MPT's and a strict consensus of these trees gave a tree with a slightly different topology. A combined analysis of the three data sets gave a single MPT with the same topology as for the morphological data set alone. The phylogeny of Aquarius presented here supports the monophyly of the A. najas, remigis, conformis and paludum species groups as well as previous hypotheses about their relationships. On the other hand, the inclusion of molecular data weakens the support for the monophyly of the genus Aquarius, and questions the specific status of the eastern North American A. nebularis (as separate from A. conformis) and members of the Nearctic A. remigis group. Finally, we discuss the implications of the reconstructed phylogeny in the biogeography and ecological phylogenetics of Aquarius.

Felix A. H. Sperling - One of the best experts on this subject based on the ideXlab platform.

  • Phylogeny of the water strider genus Gerris Fabricius (Heteroptera: Gerridae) based on COI mtDNA, EF-1α nuclear DNA and morphology
    Systematic Entomology, 2001
    Co-Authors: Jakob Damgaard, Felix A. H. Sperling
    Abstract:

    Summary Phylogenetic relationships between water striders (Heteroptera: Gerridae) of genus Gerris Fabricius were examined using molecular and morphological characters. The molecular dataset was 820 bp DNA from the 3′ half of the mitochondrial gene encoding cytochrome oxidase subunit I and 515 bp DNA from the nuclear gene encoding elongation factor 1 alpha. The morphological dataset was a slightly modified version of a previously published dataset. Representatives from all eight recognized species groups of Gerris, as well as six species from three related genera, including Gigantometra gigas, Limnoporus esakii, L. rufoscutellatus, Aquarius najas, A. conformis and A. paludum, were included. Unweighted parsimony analyses of the COI sequences gave a topology with strong support for only those nodes that were already recognized as closely related based on morphological characters. Similar analyses of EF-1α gave a cladogram with a topology quite different from that based on morphology and COI. Unweighted parsimony analyses of the ‘total evidence’ dataset largely supports the traditional view of Gerris phylogeny. Finally, the implications of the reconstructed phylogeny in relation to biogeography and ecological phylogenetics of Gerris is discussed.

  • phylogeny of the water strider genus aquarius schellenberg heteroptera gerridae based on nuclear and mitochondrial dna sequences and morphology
    Insect Systematics & Evolution, 2000
    Co-Authors: Jakob Damgaard, Nils Moller Andersen, Felix A. H. Sperling
    Abstract:

    We examined phylogenetic relationships among gerrid water striders of the genus Aquarius Schellenberg using molecular and morphological characters. The molecular data sets included 780 bp sequence data from the mitochondrial gene encoding cytochrome oxidase subunit I (COI), and 515 bp sequence data from the nuclear gene encoding elongation factor I alpha (EF-1α). The morphological data set was a slightly modified version of a previously published data set. We included all 17 known species and one subspecies of Aquarius as well as five species from three related genera, Gigantometra gigas, Limnoporus esakii, L. rufoscutellatus, Gerris pingreensis, and G. lacustris. Unweighted parsimony analyses of the COI data set gave a single most parsimonious tree (MPT) with a topology quite similar to the morphological tree. Parsimony analyses of the EF-1α data set gave 3 MPT's and a strict consensus of these trees gave a tree with a slightly different topology. A combined analysis of the three data sets gave a single MPT with the same topology as for the morphological data set alone. The phylogeny of Aquarius presented here supports the monophyly of the A. najas, remigis, conformis and paludum species groups as well as previous hypotheses about their relationships. On the other hand, the inclusion of molecular data weakens the support for the monophyly of the genus Aquarius, and questions the specific status of the eastern North American A. nebularis (as separate from A. conformis) and members of the Nearctic A. remigis group. Finally, we discuss the implications of the reconstructed phylogeny in the biogeography and ecological phylogenetics of Aquarius.

David ArmisĂŠn - One of the best experts on this subject based on the ideXlab platform.

Seung-joon Ahn - One of the best experts on this subject based on the ideXlab platform.

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