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ABSTRACT: Regional scale conservation decisions can be aided by information on the distribution of intraspecific diversity, especially
the extent to which patterns are common to multiple species. We compare patterns of intraspecific mitochondrial cytochrome
oxidase I (COI) variation among three flightless beetles (Coleoptera: Tenebrionidae: Nyctoporis carinata LeConte; Staphylinidae: Sepedophilus castaneus (Horn); Carabidae: Calathus ruficollis Dejean) in the southern part of the California Floristic Province biodiversity hotspot. All species exhibit moderate to high
levels of total variation, ranging from 2% to 10% (maximum uncorrected distance). Most populations of all species exhibit
unique haplotypes, but few populations’ haplotypes constitute exclusive clades. Many adjacent pairs of populations show indications
of some, though limited, genetic connectedness, due either to gene flow or ancestral polymorphism. However, in most cases
this diminishes sharply over greater distances. By both statistical and phylogenetic measures, Sierra Nevadan populations
are highly distinct from those in the coast and transverse ranges. Among the latter, the eastern transverse ranges are generally
most unique and isolated, with diversity in the western parts of these ranges showing fewer barriers. Otherwise, few measures
agree on areas of highest conservation value, and overall patterns tend to be species-specific.
Conservation Genetics 04/2012; 10(1):203-216. · 1.61 Impact Factor
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ABSTRACT: The first fossil of the staphylinine tribe Diochini Casey is described and figured from an inclusion in mid-Eocene (Lutetian) Baltic amber. Diochus electrussp. n. is distinguished from its congeners and the diversity of rove beetles (Staphylinidae s.l.) is summarized briefly.
ZooKeys 01/2011; · 0.88 Impact Factor
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ABSTRACT: Studies investigating the short-term benefits of asexual reproduction suggest that there are a variety of ecological and genetic factors that influence relative success rates. The current study focuses on investigating these factors in the weevil Geodercodes latipennis with newly discovered parthenogenetic populations in the California Floristic Province. Phylogenetic analysis of mitochondrial and nuclear sequence data revealed three independent transitions from sexual to asexual reproduction. One of these asexual lineages had a much broader range than the other sexual and asexual populations, and was distributed across several geographic features that have been implicated as strong phylogeographic barriers in other species in the region, suggesting high migration rates, high adaptability, or both. The success of this lineage relative to the other parthenogenetic clades may be related to its age; however, there were several possibilities explaining why it was more broadly distributed than its sexual sister group. Understanding how various factors operate in one system contributes to our understanding of how the evolutionary history of lineages with frequent transitions to parthenogenesis can be affected by the short-term advantages of asexual reproduction. © 2010 The Linnean Society of London, Biological Journal of the Linnean Society, 2010, 101, 935–948.
Biological Journal of the Linnean Society 10/2010; 101(4):935 - 948. · 2.19 Impact Factor
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ABSTRACT: The Tertiary genus Laasbium Scudder, originally described with two species and as a lineage of staphylinid beetles (Coleoptera: Staphylinidae) from the Eocene-Oligocene boundary of Florissant, Colorado, is re-evaluated. Examination of the original series for Laasbium agassizii Scudder (type species) and Laasbium sectile Scudder reveal that these represent incompletely preserved earwigs (Dermaptera). The genus Laasbium is transferred to the order Dermaptera and comments provided on the classification of Florissant fossil earwigs, all previously placed in the genus Labiduromma Scudder. A lectotype is designated for Laasbium agassizii and the following six new genera erected to accommodate the diversity of Florissant fossil earwigs (authorship of all taxa is Engel and Chatzimanolis): Petrolabis (type species: Labiduromma gurneyi Brown), Litholabis (type species: Labiduromma gilberti Scudder), Rupiforficula (type species: Labiduromma scudderi Brown), Geroncolabis (type species: Labiduromma tertiaria Scudder), Spiladopygia (type species: Labiduromma exsultatum Scudder), and Paleocarcinophora (type species: Labiduromma lithophila Scudder). The following new combinations are established: Petrolabis gurneyi (Brown), Litholabis gilberti (Scudder), Rupiforficula scudderi (Brown), Rupiforficula labens (Scudder), Rupiforficula inferna (Scudder). “Laasbium” sectile, a poorly-preserved lateral compression, is considered genus incertae sedis.
Annales Zoologici 02/2010; 60(1):101-108. · 0.48 Impact Factor
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ABSTRACT: The first known fossil species of Trypanaeus Eschscholtz (Histeridae: Trypanaeinae), Trypanaeus hispaniolus, new species, is described and figured from the remains of two females preserved in Early Miocene (Burdigalian) Dominican amber. The fossil history of Histeridae along with the higher-level classification of the subfamily Trypanaeinae is briefly discussed. An addition to the existing key to species of the genus is provided in order to accommodate the new fossil species described herein.
The Coleopterists Bulletin 09/2009; · 0.40 Impact Factor
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Insect Conservation and Diversity 10/2008; 1(4):222 - 232. · 1.71 Impact Factor
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ABSTRACT: The Transverse Ranges in southern California have been identified as having a prominent phylogeographic role. Numerous studies have identified distinct north-south and/or east-west lineage breaks involving the Transverse Ranges. However, in evaluating their findings, most authors have regarded this complex system somewhat simplistically. In this study we more deeply investigate these breaks using two approaches: first we examine the phylogeographic history of Sepedophilus castaneus (Coleoptera: Staphylinidae) and then implement a comparative phylogeography approach applying Brooks parsimony analysis to the topologies of nine additional taxa. Phylogenetic analysis, nested clade analysis, and AMOVAs for S. castaneus agree that there is a major lineage break between the eastern and western Transverse Ranges, localized between the Sierra Pelona and the San Gabriel Mountains. The comparative phylogeographic analysis supports a generally strong concordance of area relationships with geographic proximity. It is notable, however, that the Transverse Ranges as a group do not show phylogenetic cohesion, but rather they are split into three main regions: an eastern region (San Gabriel, San Bernardino, and San Jacinto Mountains), a central region (central Transverse Ranges and Sierra Pelona) that is often grouped with the Tehachapi and Sierra Nevada populations, and a western region (northwestern Transverse Ranges and Santa Ynez Mountains) that is consistently grouped with coast range areas to the north. The lineage break between east and west Transverse Ranges is attributable to the presence of a marine embayment in what is now the Santa Clara River valley 5-2.5 million years ago.
Evolution 10/2007; 61(9):2127-41. · 5.15 Impact Factor
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ABSTRACT: The California Floristic Province is home to more than 8000 species of beetles, yet their geographical patterns of supra- and infraspecific diversity remain largely unexplored. In this paper, we investigate the phylogeography and population demographics of a flightless ground beetle, Calathus ruficollis (Coleoptera: Carabidae), in southern California. We sampled 136 specimens from 25 localities divided into 10 populations using a fragment of the mitochondrial cytochrome oxidase I gene. We tested several hypotheses, including the association of geography with particular clades and populations, the degree of differentiation among regions, and the expansion of populations. Parsimony and Bayesian phylogenetic analyses along with nested clade analysis and amova indicate a deep split between the southern Sierra Nevada population and populations south and west. This split corresponds closely to the split between subspecies C. ruficollis ignicollis (southern Sierra Nevada) and C. ruficollis ruficollis. Populations otherwise exhibit limited geographical structure, though Fst values indicate some local differentiation. Mismatch distributions and Fu's Fs indicate range expansion of several populations, suggesting that some structure may have been obscured by recent exchange. The population of C. ruficollis on Santa Cruz Island, which might have been expected to be isolated, shares several haplotypes with mainland populations, appearing to represent multiple colonizations.
Diversity and Distributions 08/2007; 13(5):498 - 509. · 4.83 Impact Factor
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Stylianos. Chatzimanolis
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ABSTRACT: Thesis (Ph. D.)--University of Kansas, Ecology and Evolutionary Biology, 2004. Includes bibliographical references (leaves 248-257).
