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Beringia: Intercontinental exchange and diversification of high latitude mammals and their parasites during the Pliocene and Quaternary
Refined views of the sequence and timing of biotic expansion, geographic colonization and impact of episodic climate change have been developed for Beringia, which was a determining factor in the structure and biogeography of terrestrial faunas across the Nearctic and Neotropical regions during the Pliocene and Quaternary.
Phylogeography of the circumpolar Paranoplocephala arctica species complex (Cestoda: Anoplocephalidae) parasitizing collared lemmings (Dicrostonyx spp.)
- L. Wickström, V. Haukisalmi, S. Varis, J. Hantula, V. Fedorov, H. Henttonen
- Biology, MedicineMolecular ecology
- 1 December 2003
The parasite phylogeny does not show complete congruence with host relationships, suggesting a history of colonization and secondary patterns of dispersal from Beringia into the Canadian Arctic, an event not proposed by the host phylogenies alone.
Molecular Phylogeny and Systematics of Anoplocephaline Cestodes in Rodents and Lagomorphs
- L. Wickström, V. Haukisalmi, S. Varis, J. Hantula, H. Henttonen
- Biology, MedicineSystematic Parasitology
- 1 October 2005
The results contradict the view of uterine morphology being the primary determinant of deeper phylogenetic splits within Anoplocephalinae and indicate a rapid radiation involving a nearly simultaneous diversification of many lineages, a scenario also proposed for the arvicoline hosts.
Morphological Characterisation of Andrya Railliet, 1893, Neandrya n. g. and Paranoplocephala Lühe, 1910 (Cestoda: Anoplocephalidae) in Rodents and Lagomorphs
The present analysis and the existing phylogenetic data suggest that the structure and complexity of the early uterus are not, as previously assumed, the main phylogenetic or systematic determinants for anoplocephaline cestodes.
Molecular and morphological evidence for multiple species within Paranoplocephala omphalodes (Cestoda, Anoplocephalidae) in Microtus voles (Arvicolinae)
Molecular and morphological evidence for multiple species within Paranoplocephala omphalodes (Cestoda, Anop Locephalidae) in Microtus voles (Arvicolinae) is provided.
Taxonomy, genetic differentiation and Holarctic biogeography of Paranoplocephala spp. (Cestoda: Anoplocephalidae) in collared lemmings (Dicrostonyx; Arvicolinae)
Geographical distribution and sequence data for the first transcribed spacer (ITS1) of nuclear rDNA show that P. alternata and P. arctica are sister taxa and that the latter species probably diverged from P.Alternata in eastern Beringia.
Genetic and morphometric variation in the Holarctic helminth parasite Andrya arctica (Cestoda, Anoplocephalidae) in relation to the divergence of its lemming hosts (Dicrostonyx spp.)
The results suggest that the evolutionary history of this cestode species has included different processes acting on different geographical regions, and suggests that in the Nearctic the parasite has remained relatively unmodified because of the large cohesive populations («coadaptation»).