We use analyses of phylogeographic population structure across a suite 12 mammalian, avian, amphibian, and reptilian species species-groups to assess the role Late Miocene Pleistocene geological history in evolution distinct Baja California Peninsular Desert biota. Comparative examination phylogroup distributions provides support for previously hypothesized vicariant events produced by: middle midpeninsular seaway, late Pliocene northward transgression Sea Cortéz, seaway southern peninsular...

The genetic consequences of climate‐driven range fluctuation during the Pleistocene have been well studied for temperate species, but cold‐adapted (e.g., alpine, arctic) species that may responded uniquely to past climatic events received less attention. In particular, we no a priori expectation long‐term evolutionary elevation shifts into and out sky islands by adapted alpine habitats. Here, examined influence on differentiation historical demography in an specialist, American pika...

We review the expanding role of molecular genetics in emergence a vibrant and vital integrative biogeography. The enormous growth over past several decades number variety molecular-based phylogenetic population studies has become core information used by biogeographers to reconstruct causal connections between historical evolutionary ecological attributes taxa biotas, landscapes seascapes that contain them. A proliferation different approaches, sequences, genomes have provided for...

Abstract Aim We studied the history of colonization, diversification and introgression among major phylogroups in American pika, Ochotona princeps (Lagomorpha), using comparative statistical phylogeographic methods. Our goal was to understand how Pleistocene climatic fluctuations have shaped distribution diversity at mitochondrial DNA (mtDNA) nuclear (nDNA) loci this alpine specialist. Location North America’s Intermountain West. Methods accumulated mtDNA sequence data ( c . 560–1700 bp)...

Abstract Reevaluation of Quaternary sites fossil pika ( Ochotona ) lends no support for the inference that Nearctic pikas were not restricted to rocky habitat. The saxicolous nature all widespread, isolated populations extant and their closest Palearctic sister taxa consideration O. princeps , perhaps as indicators cool, mesic, situations. As microhabitat, remains do require entire region was cool but only suitable microhabitat existed in vicinity. Use dung alone indicative immediate...

The New World rodent family Heteromyidae shows a marvelous array of ecomorphological types, from bipedal, arid-adapted forms to scansorial, tropical-adapted forms. Although recent studies have resolved most the phylogenetic relationships among heteromyids at shallower taxonomic levels, fundamental questions deeper levels remain unresolved. This study relies on DNA sequence information 3 relatively slowly evolving mitochondrial genes, cytochrome c oxidase subunit I, 12S, and 16S, examine...

Allozymic patterns among populations of Ochotona princeps indicate a pre-Wisconsin (> 120,000 years ago) divergence four major genetic units in the western United States (northern Rocky Mountains, southern Cascade Range, and Sierra Nevada). Pikas initially spread south along cordilleran dispersal corridors during glacial stage, were fragmented into isolated montane refugia subsequent interglacial. Range re-expansion Wisconsin allowed secondary contact units, while glaciers, pluvial lakes,...

Genetic variation among populations of chewing lice (Geomydoecus actuosi) was examined in relation to chromosomal and electrophoretic their hosts (Thomomys bottae) at a contact zone. Louse demes were characterized by low levels genetic heterozygosity (H̄ = 0.039) that may result from founder effects during primary infestation hosts, compounded seasonal reductions louse population size. sampled different showed high structuring both within host localities. Microgeographic differentiation is...

Summary Species and their geographical distributions, tabulated either from regional faunal floral monographs or directly natural history collections, often are used as the basic units of analysis by ecologists biogeographers. It has been argued that in order for species to be operationally useful evolutionary ecological studies, they need recognizable identifiable distinct entities. A growing body molecular phylogeographic studies demonstrates currently recognized unreliable approximation...

Occurrence of pikas (Ochotona princeps) in the southern Rocky Mountains is closely tied to past and present distribution alpine permafrost conditions, which produce maintain appropriate talus-slope habitat. Estimates full-Wisconsin elevational depression vegetation zones support existence glacial-maximum dispersal corridors between currently isolated populations O. princeps. Altithermal warming accounts for 66.7% apparent post-Wisconsin extinctions insular region. Populations at sites with...

Contact Zones and the Genetics of Differentiation in Pocket Gopher Thomomys Bottae (Rodentia: Geomyidae) Get access John C. Hafner, Hafner 1Moore Laboratory Zoology Department Biology, Occidental CollegeLos Angeles, California 90041 Search for other works by this author on: Oxford Academic PubMed Google Scholar David J. 2Museum Southwestern Biology University New MexicoAlbuquerque, Mexico 87131 James L. Patton, Patton 3Museum Vertebrate Zoology, CaliforniaBerkeley, 94720 Margaret F. Smith...

Journal Article SONG DIALECTS AND GENE FLOW IN THE WHITE‐CROWNED SPARROW, ZONOTRICHIA LEUCOPHRYS NUTTALLI Get access David J. Hafner, Hafner Department of Biology University New Mexico Albuquerque NM 87131 Search for other works by this author on: Oxford Academic Google Scholar Karen E. Petersen Evolution, Volume 39, Issue 3, 1 May 1985, Pages 687–694, https://doi.org/10.1111/j.1558-5646.1985.tb00405.x Published: 01 1985 history Received: 02 June 1983 Accepted: 30 January

Abstract Aim The Mohave ground squirrel ( Xerospermophilus mohavensis ) is one of a few endemic species the Mojave Desert south‐western North America. We describe phylogeographic patterns within this and its sister taxon tereticaudus test hypotheses concerning their biogeographical history using genetic signatures stable versus expanding populations. compare these with those other to evaluate role vicariance in producing structure during assembly biota. Location adjacent desert regions...

Historically, a large number of taxonomic forms has been recognized within Nearctic pikas (Lagomorpha: Ochotonidae; Ochotona), including up to 13 species and 37 subspecies. After 1965, 2 have recognized: the monotypic O. collaris Alaska, British Columbia, Yukon, Northwest Territories, princeps, with 36 subspecies spread throughout western Canada United States. The princeps distinguished by subtle differences, particularly in pelage coloration body size, highly fragmented distribution on...

We investigated the biogeographic history of antelope squirrels, genus Ammospermophilus, which are widely distributed across deserts and other arid lands western North America. combined range-wide sampling all currently recognized species Ammospermophilus with a multilocus data set to infer phylogenetic relationships. then estimated divergence times within identified clades using fossil-calibrated rate-calibrated molecular clocks. Lastly, we explored generalized distributional changes since...

The sonic portion of the vocal repertoire Onychomys (0–16 kHz) consists two basic neonatal and four adult vocalization types. Two these types, one adult, show major ultrasonic elements within 20–64 kHz audio spectrum. An unusually loud pure-tone call (9.5–13.5 is examined for geographic, non-geographic, individual variation. Using six characters in both univariate multivariate analyses, we could discriminate between species, sexes, individuals. There is, presently, no evidence large-scale...

A study of chromosomal variation in the Mexican pocket gopher Cratogeomys merriami revealed differences diploid number that correspond to 3 major genetic and morphological clades within species. Each these is diagnosable based on multiple characters, including number, quantitative qualitative mitochondrial DNA. Accordingly, we restrict name C. (Thomas) include only gophers this genus from states México, México D.F., northern Morelos, west-central Puebla. We resurrect species C.fulvescens...

The evolutionary relationships of three peripheral populations jumping mice (genus Zapus) in the southwestern United States were investigated using pelage, morphologic, and allozymic data. populations, previously regarded as Z. princeps luteus, are indeed a closely related assemblage, but relictual isolates hudsonius, not princeps. They herein considered hudsonius luteus Miller (new combination). An historical Zoogeographie scenario for is presented, lines ecological inquiry suggested.

Many species of pocket gophers and their ectoparasitic chewing lice have broadly congruent phylogenies, indicating a history frequent codivergence. For variety reasons, phylogenies codiverging hosts parasites are expected to be less for more recently diverged taxa. This study is the first its scale in gopher louse system, with focus entirely on comparisons among populations within single host 3 Geomydoecus bulleri complex. We examined mitochondrial DNA from total 46 specimens collected 11...