Taxonomic notes on Amblycerus Thunberg, 1815 (Coleoptera: Bruchidae)

The following changes in nomenclature of some species of Amblyeems Thunberg, 1815, are proposed: A) Elevated to new taxonomic status- A. insuturatus (pic, 1902) from (Spennophagus subflavidus var.insuturatus); A. luteolineatus (pic, 1929) from (Spennophagus luteonotatus var .luteolineatus);A. paulonotatus (pic, 1906) from (Spennophagus luteonotatus var.paulonotatus). B) New synonymy-A. dispar(Sharp, 1885)(=Spermophagus longissimus Pic, 1902; =S. earyoborifonnis Pic, 1910; =S. guyanensis Pic, 1917; S.pieeosuturalis Pic, 1927; =S. earaeasensis Pic, 1954); A. gounellei (pic. 1902)(=S. eurtus Pic, 1911; =S. basipennis Pic, 1936); A. insuturatus (pic, 1902)(=A. woleotti Kingsolver, 1970;A.jatayensis (Pic, 1902)(=S.jatayensis var. bieolorieeps Pic, 1955; =S.jatayensis var. hahnelli Pic, 1955; A. IIwltimaculatus (pic, 1902)( =S. minasensis Pic, 1918); A. perfectus (Sharp, 1885)(=S. maeulatopygus Pic, 1927); A. reticulatus (Jekel, 1855)(=S. rufotestaeeus Pic, 1912);A.luteolineatus (pic, 1929)(=S. multisignatus Pic, 1954). C). Lectotype/s and paralectotype/s are designated for: S. luteonotatus Pic, 1902; S. multimaeulatus Pic, 1902; S. maeulatopygus Pic, 1927; S. subflavidus Pic, 1902; S. trisignatus Sharp, 1885; S.jatayensis Pic, 1902; S. longissimus Pic, 1902; S. earyoborifonnis Pic, 1910; S. dispar Sharp, 1885; S. subflavidusvar. insuturatus Pic, 1902. For all species listed in this paper, we provide a bibliography, label data on type material, sex of types and their repository

Bruchidae (Insecta: Coleoptera) of the Galapagos Islands with new host and locality records, new synonyms, and descriptions of two new species

Records and descriptions are given for the 10 known species in six genera of Bruchidae from the Archipelago including Sennius falcatus New Species and Acanthoscelides rossi New Species. Amblycerus (Spermophagus) insulamm (Blair) is synonymized with Amblycems piurae (Pierce), New Synonymy. Five of the species herein treated are new records for the Archipelago, and 8 of the 10 are also known from mainland South America, principally Ecuador

Scaling laws and universality in the choice of election candidates

Nowadays there is an increasing interest of physicists in finding regularities related to social phenomena. This interest is clearly motivated by applications that a statistical mechanical description of the human behavior may have in our society. By using this framework, we address this work to cover an open question related to elections: the choice of elections candidates (candidature process). Our analysis reveals that, apart from the social motivations, this system displays features of traditional out-of-equilibrium physical phenomena such as scale-free statistics and universality. Basically, we found a non-linear (power law) mean correspondence between the number of candidates and the size of the electorate (number of voters), and also that this choice has a multiplicative underlying process (lognormal behavior). The universality of our findings is supported by data from 16 elections from 5 countries. In addition, we show that aspects of network scale-free can be connected to this universal behavior.Comment: Accepted for publication in EP

Mutual information in random Boolean models of regulatory networks

The amount of mutual information contained in time series of two elements gives a measure of how well their activities are coordinated. In a large, complex network of interacting elements, such as a genetic regulatory network within a cell, the average of the mutual information over all pairs is a global measure of how well the system can coordinate its internal dynamics. We study this average pairwise mutual information in random Boolean networks (RBNs) as a function of the distribution of Boolean rules implemented at each element, assuming that the links in the network are randomly placed. Efficient numerical methods for calculating show that as the number of network nodes N approaches infinity, the quantity N exhibits a discontinuity at parameter values corresponding to critical RBNs. For finite systems it peaks near the critical value, but slightly in the disordered regime for typical parameter variations. The source of high values of N is the indirect correlations between pairs of elements from different long chains with a common starting point. The contribution from pairs that are directly linked approaches zero for critical networks and peaks deep in the disordered regime.Comment: 11 pages, 6 figures; Minor revisions for clarity and figure format, one reference adde

Group theory for structural analysis and lattice vibrations in phosphorene systems

Group theory analysis for two-dimensional elemental systems related to phosphorene is presented, including (i) graphene, silicene, germanene and stanene, (ii) dependence on the number of layers and (iii) two stacking arrangements. Departing from the most symmetric $D_{6h}^{1}$ graphene space group, the structures are found to have a group-subgroup relation, and analysis of the irreducible representations of their lattice vibrations makes it possible to distinguish between the different allotropes. The analysis can be used to study the effect of strain, to understand structural phase transitions, to characterize the number of layers, crystallographic orientation and nonlinear phenomena.Comment: 24 pages, 3 figure