Ändra sökning
Avgränsa sökresultatet
1 - 3 av 3
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Träffar per sida
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sortering
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
  • Standard (Relevans)
  • Författare A-Ö
  • Författare Ö-A
  • Titel A-Ö
  • Titel Ö-A
  • Publikationstyp A-Ö
  • Publikationstyp Ö-A
  • Äldst först
  • Nyast först
  • Skapad (Äldst först)
  • Skapad (Nyast först)
  • Senast uppdaterad (Äldst först)
  • Senast uppdaterad (Nyast först)
  • Disputationsdatum (tidigaste först)
  • Disputationsdatum (senaste först)
Markera
Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Bukontaite, Rasa
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. Swedish Museum of Natural History, Sweden.
    Bergsten, Johannes
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. Swedish Museum of Natural History, Sweden.
    Naimi, Babak
    University of Copenhagen, Denmark.
    Svensson, Erik I.
    Lund University, Sweden.
    Phylogeny, distribution and speciation in the endemic diving beetle genus Pachynectes on MadagascarManuskript (preprint) (Övrigt vetenskapligt)
    Abstract [en]

    Madagascar is well known for high levels of endemism in both the flora and fauna. More specifically most of Madagascars' endemic species have extremely restricted regional distributions, which is a characteristic of this large island’s biodiversity. Biologists are still struggling to understand the speciation processes that have produced this pattern of diversity. Several general hypotheses have been developed trying to explain the origin and microendemism of Malagasy species. Two main hypotheses focus on watersheds and climate gradients. Here, we use a phylogeny in combination with data on spatial distribution of the endemic diving beetle genus Pachynectes (Coleoptera: Dytiscidae: Bidessini) to critically evaluate the watershed versus the climatic gradient hypotheses of this river dwelling insect radiation. Based on field sampling from expeditions between 2006 and 2014, we first show that the species diversity in this genus is at least three times higher than previously believed. We reconstructed a molecular phylogeny based on five gene fragments and recovered three main clades: a western clade, an eastern clade and a "keeled" clade diagnosable based on an elytral keel. The western and keeled clades both occur mainly in the drier western parts of the country, while species in the eastern clade are typical of rivers in the eastern humid rainforest. Notably, sister species were always allopatrically distributed along either latitudinal or longitudinal-altitudinal gradients. Based on species distribution modelling (SDM) and our phylogenetic data, we conclude that the microendemic patterns of Pachynectes species are unlikely to be explained by the watershed hypothesis. In contrast, the four main bioclimatic regions are more likely to have been causally involved in the past speciation processes and might explain the current distribution pattern in this insect genus.  

  • 2.
    Lähteenaro, Meri
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. Swedish Museum of Natural History, Sweden.
    Straka, Jakub
    Forshage, Mattias
    Hovmöller, Rasmus
    Nakase, Yuta
    Nilsson, Anders L.
    Smit, John T.
    Nylander, Johan A. A.
    Bergsten, Johannes
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen. Swedish Museum of Natural History, Sweden.
    Phylogenomic species delimitation of the twisted-winged parasite genus Stylops (Strepsiptera)2023Ingår i: Systematic Entomology, ISSN 0307-6970, E-ISSN 1365-3113Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The twisted-winged parasite genus Stylops has a history of different species concepts with varying host specificity resulting in diverse species diversity estimates in different regions of the Holarctic. The adoption of a supergeneralist species concept in Europe, proposing synonymization of all Western Palaearctic Stylops species, did not facilitate taxonomic clarity and obscured the available life-history data in the region for decades. Lack of molecular data has allowed divergent opinions on species hypotheses and little opportunity for evaluating them in this morphologically challenging genus. To solve these discrepancies and gain novel information about host associations, we applied whole-genome sequencing to 163 specimens, representing a significant portion of putative European species. We evaluate the existing and conflicting species hypotheses with molecular species delimitation using Species bOundry Delimitation using Astral (SODA) and use a maximum likelihood phylogeny to investigate host associations of the species. Furthermore, we evaluate the effect of a number of loci used in SODA for the number of inferred species. We find justification for synonymization of multiple species and indications of undescribed species, as well as new host–parasite relationships. We show that the number of inferred species in SODA is exceedingly and positively correlated with the number of loci used, urging for cautious application. The results of our study bring clarity to the Western Palaearctic species diversity of Stylops. Furthermore, the comprehensive molecular dataset generated in this study will be a valuable resource for future studies on Stylops and the evolution of parasites in general. 

  • 3.
    Stålstedt, Jeanette
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen, Avdelningen för zoologisk systematik och evolutionsforskning. Swedish Museum of Natural History, Sweden.
    Bergsten, Johannes
    Stockholms universitet, Naturvetenskapliga fakulteten, Zoologiska institutionen, Avdelningen för zoologisk systematik och evolutionsforskning.
    Mąkol, Joanna
    Matching adults and larvae of Erythraeus spp. velvet mites (Actinotrichida: Erythraeidae) with the help of DNAManuskript (preprint) (Övrigt vetenskapligt)
1 - 3 av 3
RefereraExporteraLänk till träfflistan
Permanent länk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf