Evolution Commons^™

Euscorpiops Neradi Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae), František Kovařík, Jana Plíšková, František Šťáhlavský

Euscorpius

Euscorpiops neradi sp. n. from Thailand is described and compared with other species of the genus Euscorpiops Vachon, 1980. It is the smallest species of the genus, with total length about 25 mm in both sexes. In E. neradi sp. n. external trichobothria on the patella number 16 (5 eb, 2 esb, 2 em, 3 est, 4 et) and ventral trichobothria on the patella number 6. Pedipalp fingers are flexed in males and straight in females.

Alloscorpiops Citadelle Sp. N. From Thailand (Scorpiones: Euscorpiidae: Scorpiopinae)., František Kovařík

Euscorpius

Alloscorpiops citadelle sp. n. from Thailand is described and compared with A. anthracinus (Simon, 1887). A. citadelle sp. n. is characterized mainly by a higher number of trichobothria on the patella, which has 29–34 external (23–24 in A. anthracinus) and 19–21 ventral (15–19 in A. anthracinus) trichobothria.

Evolution Of Scorpion Orthobothriotaxy: A Cladistic Approach, Michael E. Soleglad, Victor Fet

Euscorpius

This study presents a cladistic analysis of the derivation of orthobothriotaxic patterns in scorpions. Included in this analysis are the original three orthobothriotaxic patterns defined by Vachon (1972, 1974), the pattern of the unique scorpion Pseudochactas ovchinnikovi Gromov, 1998, and two trichobothrial patterns of fossil scorpions, the Upper Carboniferous palaeopisthacanthids and the Lower Cretaceous archaeobuthids. An overview of all fossil scorpion material where trichobothria are reported is presented in detail. The approach used in this analysis is to model the existence of an individual trichobothrium, adopting the ‘absence of’, ‘petite size’ and ‘full size’ as incremental stages of a trichobothrium’s …

Contributions To Scorpion Systematics. I. On Recent Changes In High-Level Taxonomy, Victor Fet, Michael E. Soleglad

Euscorpius

Prendini & Wheeler (2005) criticized the methods of phylogenetic analyses by Soleglad, Fet, and their coauthors, and executed an unprecedented taxonomic action: without analyzing any of these taxa, they performed a wholesale synonymization of four parvorders, eight superfamilies, one family, 11 subfamilies, eight tribes, two subtribes, and three genera (in total, 37 taxa) of scorpions, and made other taxonomic changes. No alternative new classification has been proposed (instead, they revert to a previous classification), and no results of original work on this subject by Prendini & Wheeler (2005) have been presented. Here, we reverse all taxonomic changes performed by Prendini …

Melanin Concentration Gradients In Modern And Fossil Feathers, Daniel J. Field, Liliana D’Alba, Jakob Vinther, Samuel M. Webb, William Gearty, Matthew D. Shawkey

School of Biological Sciences: Faculty Publications

In birds and feathered non-avian dinosaurs, within-feather pigmentation patterns range from discrete spots and stripes to more subtle patterns, but the latter remain largely unstudied. A ,55 million year old fossil contour feather with a dark distal tip grading into a lighter base was recovered from the Fur Formation in Denmark. SEM and synchrotron-based trace metal mapping confirmed that this gradient was caused by differential concentration of melanin. To assess the potential ecological and phylogenetic prevalence of this pattern, we evaluated 321 modern samples from 18 orders within Aves. We observed that the pattern was found most frequently in distantly …

Etudes On Iurids, Ii. Revision Of Genus Calchas Birula, 1899, With The Description Of Two New Species (Scorpiones: Iuridae), Victor Fet, Michael E. Soleglad, František Kovařík

Euscorpius

The relict, phylogenetically important scorpion genus Calchas Birula, 1899 (Iuridae) remained monotypic since its description. Its sole species, Calchas nordmanni Birula, 1899, was known only from northeastern Turkey until Kinzelbach (1980) published first records from southern and southeastern Turkey. A few more localities have been reported from Turkey; the species was also found on two Greek islands, Samos and Megisti. We analyzed significant material (63 specimens, including a previously unpublished large series from Naturhistorisches Museum Wien), and concluded that three distinct, disjunct species exist rather than one widespread species as previously thought. Two new species are described: Calchas birulai sp. …

Ecological Niche Modeling Of Two Scorpion Species Mesobuthus Eupeus (C. L. Koch, 1839) And M. Phillipsii (Pocock, 1889) From The Iranian Plateau And Zagros Region (Arachnida: Scorpiones), Omid Mirshamsi

Euscorpius

Ecological niche modeling has allowed several advances in the process of species delimitation. In the present study, I used this method to evaluate the climatic divergence between two scorpion species, Mesobuthus eupeus and M. phillipsii. The ecological niche models (ENMs) were created based on presence-only data with the maximum entropy method. The created models, results of spatial analysis (PCA and Hotelling discriminant), and an identity test suggested that the divergence between these two species is associated with significant divergence in their ecological niches. The results of this study provide additional support for the taxonomic validity the studied species.

A New Species Of Tityus C. L. Koch, 1836 (Scorpiones: Buthidae) From Dominican Amber, Wilson R. Lourenço

Euscorpius

Tityus azari sp. n., a new species of fossil scorpion belonging to the genus Tityus C. L. Koch, 1836 is described based on a specimen in amber from the Dominican Republic. Although the new species can be associated with the extant fauna of the Neotropical region, it presents some particular morphological features such as the presence of sharp denticles on the edge of pedipalp fingers. Due to the incompleteness of the specimen it cannot be assigned to any precise extant subgenera. Once again, this discovery attests to a considerable degree of diversity in the Dominican amber-producing forests.

The Cretaceous Scorpion Genus, Archaeobuthus, Revisited (Scorpiones: Archaeobuthidae), Chris Baptista, Jorge A. Santiago-Blay, Victor Fet, Michael E. Soleglad

Euscorpius

No abstract provided.

The Scorpions Of Hainan Island, China (Arachnida: Scorpiones), Zhi-Yong Di, Zhi-Jian Cao, Ying-Liang Wu, Lin Zhu, Hui Liu, Wen-Xin Li

Euscorpius

The redescriptions and illustrations of three species, Isometrus (Isometrus) maculatus (DeGeer, 1778), Lychas mucronatus (Fabricius, 1798) (Buthidae), and Liocheles australasiae (Fabricius, 1775) (Hemiscorpiidae) from Hainan Island, China are presented. Distribution data and updated key of Hainan scorpions are provided.

Review Of The Subgenus Pandinurus Fet, 1997 With Descriptions Of Three New Species (Scorpiones, Scorpionidae, Pandinus)., František Kovařík

Euscorpius

Pandinus (Pandinurus) awashensis sp. n. from Ethiopia, P. (P.) somalilandus sp. n. from Somaliland, and P. (P.) lowei sp. n. from Democratic Republic of Congo are described and compared with other species of the subgenus. P. (P.) sudanicus Hirst, 1911 stat. n. previously considered a synonym of P. (P.) magrettii Borelli, 1901 is recognized as a valid species. New data on taxonomic characters and distribution of the subgenus Pandinurus are presented. Also presented are a map of distribution, photos of the localities and a key to species using hitherto unpublished characters of the tarsomere spination formula and sexual …

Reproductive Isolation In The Elegans-Group Of Caenorhabditis, Scott Everet Baird, Sara Rose Seibert

Biological Sciences Faculty Publications

Reproductive isolation is the basis of the Biological Species Definition and can be a driving force of speciation. Theoretical studies have provided models of how reproductive isolation can arise within individual species. Genetic tests of these models are limited to populations in which reproductive isolation is present but not complete. Here, reproductive isolation in the Elgans-Group of the nematode genus Caenorhabditis is reviewed. Pre-mating barriers, assortative fertilization and post-zygotic barriers all have been observed in this clade. In some combinations of species, fertile F1 hybrids can be obtained. Therefore, the Elegans-Group of Caenorhabditis is poised to become an important experimental …

A Comparison Of Relative Ear Length Between Two Neighboring Populations Of Peromyscus Maniculatus, Joshua S. Willems

Biological Sciences

This study attempts to determine if a significant difference in relative ear length exists between two neighboring populations of Peromyscus maniculatus on the central coast of California. Data was collected from individuals trapped at two plots in the Guadalupe-Nipomo Dunes National Wildlife Refuge and two plots near Black Lake, under the supervision of Francis X. Villablanca, Ph. D. of California Polytechnic State University, San Luis Obispo. A total of 98 individuals were captured over the course of three nights of trapping. A regression analysis was performed comparing the ear lengths of each population relative to body size. The analysis of …

Landscape Genetics Of Leaf-Toed Geckos In The Tropical Dry Forest Of Northern Mexico, Christopher Blair, Victor H. Jimenez-Arcos, Fausto R. Mendez De La Cruz, Robert W. Murphy

Publications and Research

Habitat fragmentation due to both natural and anthropogenic forces continues to threaten the evolution and maintenance of biological diversity. This is of particular concern in tropical regions that are experiencing elevated rates of habitat loss. Although less well-studied than tropical rain forests, tropical dry forests (TDF) contain an enormous diversity of species and continue to be threatened by anthropogenic activities including grazing and agriculture. However, little is known about the processes that shape genetic connectivity in species inhabiting TDF ecosystems. We adopt a landscape genetic approach to understanding functional connectivity for leaf-toed geckos (Phyllodactylus tuberculosus) at multiple sites …

Attitudes Toward Evolution At New England Colleges And Universities, United States, Guillermo Paz-Y-Miño-C, Avelina Espinosa

New England Science Public: Series Evolution

Paz-y-Miño-C G & Espinosa A. 2013. Attitudes toward Evolution at New England Colleges and Universities, United States. New England Science Public: Series Evolution 1(1): 1-32 (ISSN: 2326-0971). We compile the most significant results of our conceptual and quantitative studies on the patterns of acceptance of evolution at New England colleges and universities, conducted between 2009 and 2012. We examine the views of New England Faculty and Educators of Prospective Teachers (higher-education faculty themselves, specialized in training future teachers) from 35 colleges and universities, as well as a representative sample of College Students from a Public, Private and two Religious …

Assessing Regional And Interspecific Variation In Threshold Responses Of Forest Breeding Birds Through Broad Scale Analyses, Yntze Van Der Hoek, Rosalind Renfrew, Lisa L. Manne

Publications and Research

Background: Identifying persistence and extinction thresholds in species-habitat relationships is a major focal point of ecological research and conservation. However, one major concern regarding the incorporation of threshold analyses in conservation is the lack of knowledge on the generality and transferability of results across species and regions. We present a multi-region, multi-species approach of modeling threshold responses, which we use to investigate whether threshold effects are similar across species and regions.

Methodology/Principal Findings: We modeled local persistence and extinction dynamics of 25 forest-associated breeding birds based on detection/non-detection data, which were derived from repeated breeding bird atlases for the state …

(Review) Deep History: The Architecture Of Past And Present, Frederick S. Paxton

History Faculty Publications

The article reviews the book "Deep History: The Architecture of Past and Present," edited by Andrew Shryock and Daniel Lord Smail.

Recently Described Vulture One Of Several New Avian Species From The Ashfall Fossil Beds, Rick E. Otto

University of Nebraska State Museum: Programs Information

Several species of fossil bird are known from the Ashfall Fossil Beds. As of publication date, all represent previously undescribed species. In 2012, ornithologists Zhang, Feduccia and James described a vulture from isolated remains recovered from the Ashfall site in 1979. Similar in morphology to the Palm-nut Vulture (Gypohierax) of Africa, the relationship to the Ashfall vulture is unclear, and may represent an example of convergent evolution. The fossil vulture was designated Anchigyps voorhiesiin honor of paleontologist Michael Voorhies.

Tree Climbing And Human Evolution, Vivek V. Venkataraman, Thomas S. Kraft, Nathaniel J. Dominy

Dartmouth Scholarship

Paleoanthropologists have long argued—often contentiously—about the climbing abilities of early hominins and whether a foot adapted to terrestrial bipedalism constrained regular access to trees. However, some modern humans climb tall trees routinely in pursuit of honey, fruit, and game, often without the aid of tools or support systems. Mortality and morbidity associated with facultative arboreality is expected to favor behaviors and anatomies that facilitate safe and efficient climbing. Here we show that Twa hunter–gatherers use extraordinary ankle dorsiflexion (>45°) during climbing, similar to the degree observed in wild chimpanzees. Although we did not detect a skeletal signature of dorsiflexion …

Filling In The Gaps In Phenology And Life History Of The Cumberland Plateau Salamander (Plethodon Kentucki), Robert C. Bowers

Theses, Dissertations and Capstones

The Cumberland Plateau Salamander, Plethodon kentucki, is a member of the Plethodon glutinosus complex comprising 16 sibling species, which are best differentiated by range. Few studies have been conducted to gain information on the natural history of P. kentucki. To alleviate this, two sites at Beech Fork State Park in Wayne County, West Virginia were used to study the salamander’s general life history with emphasis on reproduction, phenology, and population size. At each site, three 20m x 20m sample plots were arranged based on viability of the habitat for P. kentucki. Ground searches of all cover objects …