Generic Revision in the Holarctic Ground Squirrel Genus Spermophilus

@inproceedings{Helgen2009GenericRI,
  title={Generic Revision in the Holarctic Ground Squirrel Genus Spermophilus},
  author={Kristofer M. Helgen and F. Russell Cole and Lauren E. Helgen and Don E Wilson},
  year={2009}
}
Abstract The substantial body of research on Holarctic ground squirrels amassed over the past century documents considerable variability in morphological, cytogenetic, ecological, and behavioral attributes in the genus Spermophilus F. Cuvier, 1825. Recent molecular phylogenetic studies suggest that the traditionally recognized genera Marmota Blumenbach, 1779 (marmots), Cynomys Rafinesque, 1817 (prairie dogs), and Ammospermophilus Merriam, 1892 (antelope ground squirrels) render Spermophilus… Expand
A review of bristly ground squirrels Xerini and a generic revision in the African genus Xerus
TLDR
The phylogenetic reconstruction, based on the analysis of cytochrome b gene and including all known species of Xerini, confirms a deep divergence between the African taxa and the Asiatic Spermophilopsis. Expand
Ground squirrels (Rodentia, Sciuridae) of the late Cenozoic Meade Basin sequence: diversity and paleoecological implications
TLDR
Faunal change through the sequence is interpreted as primarily reflecting a shift from a Pliocene assemblage of “southwestern” taxa with granivorous/omnivorous diets to a Pleistocene temperate assemblages of grazing taxa that either exhibited relatively high-crowned, transversely wider cheek teeth or were otherwise dependent on grassland habitats. Expand
Towards a uniform nomenclature for ground squirrels: the status of the Holarctic chipmunks
TLDR
It is demonstrated that the chipmunk lineages diverged early in the evolution of the Marmotini, well before various widely accepted genera of marmotine ground squirrels. Expand
Redescription and phylogenetic relationships of Spermophilus citelloides (Rodentia: Sciuridae: Xerinae), a ground squirrel from the Middle Pleistocene – Holocene of Central Europe
ABSTRACT Spermophilus citelloides is a poorly known Old World ground squirrel from the Middle Pleistocene – early Holocene of Central Europe that has only been briefly described previously. Here, weExpand
Phylogeny and genetic structure of the Yellow ground squirrel, Spermophilus fulvus (Lichtenstein, 1823), in Iran
TLDR
The phylogenetic analysis found that S. fulvus was divided into three main mtDNA clades in Iran, and proposed the three isolated clades of the Yellow ground squirrel identified in Iran as three ESUs, which may suggest that populations of theYellow ground squirrel in Iran fell under the influence of glacial and interglacial cycles along a longitudinal axis. Expand
Ancient hybridization and subsequent mitochondrial capture in ground squirrels (genus Ictidomys)
TLDR
Data suggested an ancient hybridization event during the Pleistocene, followed by capture of the I. tridecemlineatus mitochondrial haplotype by I. parvidens, and analyses of the SmcY gene supported contemporary hybridization at six localities. Expand
Species limits and integrated taxonomy of the Idaho ground squirrel (Urocitellus brunneus): genetic and ecological differentiation
TLDR
The cohesion species concept is used to test whether both genetic and ecological data support species-level classification of U. b. Expand
Across the great divide: revision of the genus Eupetaurus (Sciuridae: Pteromyini), the woolly flying squirrels of the Himalayan region, with the description of two new species
  • S. Jackson, Quan Li, +6 authors Xue-Long Jiang
  • Biology
  • 2021
TLDR
It is suggested that the three widely disjunct populations of Eupetaurus are each sufficiently differentiated genetically and morphologically to be recognized as distinct species, two of which are described here as new. Expand
Systematic Review of Endemic Sulawesi Squirrels (Rodentia, Sciuridae), with Descriptions of New Species of Associated Sucking Lice (Insecta, Anoplura), and Phylogenetic and Zoogeographic Assessments of Sciurid Lice
Abstract Analyses of fur color patterns, morphometric data derived from external, cranial, and dental dimensions, and distributions of collection sites for voucher specimens form the basis for aExpand
Phylogenetics and biogeography of the microendemic rodent Xerospermophilus perotensis (Perote ground squirrel) in the Oriental Basin of Mexico
TLDR
Climate cycles during the Pleistocene and the final uplift of the Trans-Mexico Volcanic Belt may have played a major role in early diversification in this lineage of Perote ground squirrel. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 306 REFERENCES
Multigenic and morphometric differentiation of ground squirrels (Spermophilus, Scuiridae, Rodentia) in Turkey, with a description of a new species.
TLDR
The potential of combined molecular and morphometric studies to uncover new Anatolian species and to reconstruct their phylogeographic history is illustrated and the new species is important for squirrel taxonomy and for understanding Eurasian mammal evolution. Expand
Phylogeny and Evolutionary History of the Ground Squirrels (Rodentia: Marmotinae)
TLDR
A phylogeny that includes all 43 currently recognized species in the two genera of ground squirrels as well as representatives of two closely related genera suggests that convergence in morphology has been a common theme in ground squirrel evolution. Expand
Morphologically derived ground squirrels from the Borchers local fauna, Meade County, Kansas, with a redescription of ?Spermophilus cragini
ABSTRACT We provide a description of the complete adult and upper deciduous cheek dentition of ?Spermophilus cragini, previously known only from M1–M3, from the transitional Blancan–IrvingtonianExpand
Chromosomes and taxonomy of the ground squirrel subgenus Ictidomys.
TLDR
Taxonomic conclusions based on chromosomal characters agree closely with those based on characters of gross morphology and indicate that all three species are correctly classified as members of the same subgenus. Expand
Sciurid phylogeny and the paraphyly of Holarctic ground squirrels (Spermophilus).
TLDR
DNA sequence data from the mitochondrial cytochrome b gene of 114 species in 21 genera is used to infer phylogenetic relationships among sciurids based on maximum parsimony and Bayesian phylogenetic methods and found the phylogeny of squirrels to be in substantial conflict with the current taxonomy. Expand
Holarctic Evolution and Dispersal of Squirrels (Rodentia: Sciuridae)
Members of the rodent family Sciuridae occur on all continents except Australia. Squirrels are one of the few families of mammals to have such a nearly cosmopolitan distribution. However, patterns ofExpand
Taxonomic status of the genus Spermophilus (Mammalia: Rodentia) in Turkey and Iran with description of a new species
TLDR
A new species of Spermophilus is reported, distributed in the Taurus Mountains in southern Anatolia, Turkey, with Morphometrics, coat coloration, a brush-shaped tail, and a NFa value of 72 are diagnostic characters that distinguish S. torosensis sp. Expand
Nuclear DNA phylogeny of the squirrels (Mammalia: Rodentia) and the evolution of arboreality from c-myc and RAG1.
TLDR
A comprehensive molecular phylogeny for the family Sciuridae is reported on and Parsimony, likelihood, and Bayesian analyses reveal five major lineages and refute the conventional elevation of the flying squirrels (Pteromyinae) to subfamily status. Expand
Taxonomy and distribution of the Idaho ground squirrel, Spermophilus brunneus
Spermophilus brunneus was found in isolated meadows surrounded by coniferous forests in Adams and Valley counties, Idaho, and also further south at lower elevations in the relatively xeric foothillsExpand
Conservation of Endemic Mammals of Mexico: The Perote Ground Squirrel (Spermophilus perotensis)
About 25% of all land mammals from Mexico face conservation problems. Endemic spe­ cies, particularly those with restricted distributions, contribute a disproportionately large number of species toExpand
...
1
2
3
4
5
...