@article {22123, title = {In and out of America: ecological and species diversity in Holarctic giant silkmoths suggests unusual dispersal, defying the dogma of an Asian origin}, journal = {Journal of Biogeography}, volume = {47}, year = {2020}, pages = {903-914}, chapter = {903}, abstract = {

\"Aim: There is growing evidence that the North Atlantic Land Bridge may have had a significant, underappreciated, role in structuring northern hemispheric biodiversity. Understanding the biogeography of less vagile animals with specific habitat requirements could provide fine-scale information about the duration and environmental conditions of both the North Atlantic Land Bridge and the Bering Land Bridge.
Location: Asia, Europe and North America.
Taxon: Saturnia giant silkmoths. The genus has a relictual distribution from the Neogene, with species and subgenera endemic to subregions across the Northern Hemisphere.
Methods: We sequenced six genes totalling 4,674 base pairs from representatives of all subgenera and augmented this with publicly available COI sequences to build a dataset covering 34 Saturnia species\—about half of the described species. Datasets were subjected to phylogenetic, molecular dating and biogeographic analyses.
Results: We found that adding a \‘jump\’ parameter to a dispersal\–extinction\–cladogenesis (DEC) model results in contradictory biogeographic inferences, with the jump dispersal model being more biologically plausible for Saturnia. We found that Saturnia has a much earlier origin in North America than previously thought, and from there colonized Europe. The most parsimonious scenario involves a relatively recent (19.6\–11.7 Ma) transit across the North Atlantic Land Bridge, and subsequent dispersal across all of Eurasia. Without jump dispersal, Saturnia biogeography requires complex patterns of in situ extinction and recolonization followed by bursts of dispersal and speciation.
Main conclusions: Although it is difficult to verify the appropriate model through fossil data or tectonic histories, allowing jump dispersal in Saturnia moth biogeography invokes far fewer assumptions and indicates the use of both Beringia and the North Atlantic Land Bridge, suggesting the importance of the latter for other groups may be underestimated.\"

}, keywords = {AGAPEMA, BERINGIA, BIOGEOGRAPHY, CACHOSATURNIA, CAD, CALOSATURNIA, CATALOGUE, COI, DNA, EF-1ALPHA, IDH, MAXIMUM LIKELIHOOD, NEORIS, NORTH ATLANTIC LAND BRIDGE, PERISOMENA, PHYLOGENY, RINACA, RpS5, SATURNIA, SATURNIIDAE, WINGLESS}, author = {Rubinoff, D. and Doorenweerd, C.} } @article {22123, title = {Systematics and biogeography reciprocally illuminate taxonomic revisions in the silkmoth genus Saturnia (Lepidoptera: Saturniidae)}, journal = {Journal of the Lepidopterists{\textquoteright} Society}, volume = {74}, year = {2020}, pages = {1-6}, chapter = {1}, abstract = {

\"The Holarctic Saturniid genus Saturnia contains eight subgenera, though their taxonomic ranks have been in flux for decades. A prior biogeographic analysis with a six gene molecular phylogeny of Saturnia including 34 species and representatives of all but one subgenus supports distinct divisions that require taxonomic changes to accurately reflect their biology and phylogeography. In the current study, we add more publicly available COI sequence data to the previous dataset, and include all subgenera, which resulted in a dataset with approximately 67 species. Based on inferred phylogenies of the 34-species and 67-species datasets as well as the biogeographic analyses, we propose to elevate six subgenera to genus level: Agapema Neumoegen \& Dyar 1894 stat. rev., Cachosaturnia Naumann, L\öffler \& N\ässig 2012 stat. nov., Calosaturnia Smith 1886 stat. rev., Neoris Moore 1862 stat. rev., Perisomena Walker 1855 stat. rev., Rinaca Walker 1855 stat. rev. Additionally, we synonymize Eudia Jordan 1911 syn. nov. with Saturnia Schrank 1802 because it renders Saturnia paraphyletic, and confirm the previous synonymization of Eriogyna Jordan 1911 with Saturnia and of Caligula Moore 1862 with Rinaca Walker 1855. With these changes, molecular phylogeny and biogeographic analysis has informed taxonomy of a prominent, but poorly-understood group and revealed how the complex biogeography and active biotic exchange across the northern hemisphere has promoted diversification in previously unrecognized groups.\"

}, keywords = {AGAPEMA, BERINGIA, BIOGEOGRAPHY, CACHOSATURNIA, CAD, CALOSATURNIA, CATALOGUE, COI, DNA, EF-1ALPHA, IDH, MAXIMUM LIKELIHOOD, NEORIS, NORTH ATLANTIC LAND BRIDGE, PERISOMENA, PHYLOGENY, RINACA, RpS5, SATURNIA, SATURNIIDAE, WINGLESS}, author = {Rubinoff, D. and Doorenweerd, C.} }