20.500.12556/DiRROS-19577 Biogeography of the Caribbean Cyrtognatha spiders Island systems provide excellent arenas to test evolutionary hypotheses pertaining to gene flow and diversification of dispersal-limited organisms. Here we focus on an orbweaver spider genus Cyrtognatha (Tetragnathidae) from the Caribbean, with the aims to reconstruct its evolutionary history, examine its biogeographic history in the archipelago, and to estimate the timing and route of Caribbean colonization. Specifically, we test if Cyrtognatha biogeographic history is consistent with an ancient vicariant scenario (the GAARlandia landbridge hypothesis) or overwater dispersal. We reconstructed a species level phylogeny based on one mitochondrial (COI) and one nuclear (28S) marker. We then used this topology to constrain a time-calibrated mtDNA phylogeny, for subsequent biogeographical analyses in BioGeoBEARS of over 100 originally sampled Cyrtognatha individuals, using models with and without a founder event parameter. Our results suggest a radiation of Caribbean Cyrtognatha, containing 11 to 14 species that are exclusively single island endemics. Although biogeographic reconstructions cannot refute a vicariant origin of the Caribbean clade, possibly an artifact of sparse outgroup availability, they indicate timing of colonization that is much too recent for GAARlandia to have played a role. Instead, an overwater colonization to the Caribbean in mid-Miocene better explains the data. From Hispaniola, Cyrtognatha subsequently dispersed to, and diversified on, the other islands of the Greater, and Lesser Antilles. Within the constraints of our island system and data, a model that omits the founder event parameter from biogeographic analysis is less suitable than the equivalent model with a founder event. biogeography spiders true false true Angleški jezik Ni določen Neznano 2024-07-20 04:00:47 2024-07-23 14:48:52 2024-07-24 03:48:00 0000-00-00 00:00:00 2019 0 0 Nasl. z nasl. zaslona; Opis vira z dne 11. 2. 2019; str. 1-14 Vol. 9 2019 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2019-01-23 574 2045-2322 10.1038/s41598-018-36590-y 4987471 http://dx.doi.org/10.1038/s41598-018-36590-y 1 293dfc30-462b-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27034 RAZ_Candek_Klemen_2019.pdf RAZ_Candek_Klemen_2019.pdf 1 2FF989375F4F3D8F83202B9F3B307024 d4c82c92e99f3d9252dbd1b6e0f685b98ef2ef3b819d2b3bdb100f90f9280902 7fd5d21e-48e1-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27203 Nacionalni inštitut za biologijo 0 0 0