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Results 351 - 400 of 1398
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Tahir, Hafiz - - 2009
We conducted a field study in September 2007 and 2008 to analyze the foraging activity, natural diets, and predatory efficacy of Tetragnatha javana (Thorell 1890) (Araneae: Tetragnathidae) and Neoscona theis (Walckenaer 1842) (Araneae: Araneidae) on selected prey. The relationship between body measurements (carapace width, leg length, total body length, and ...
Ojanguren-Affilastro, Andres - - 2009
New data on the distribution and systematics of Patagonian species of the scorpion genus Urophonius Pocock 1893 are provided. A species of this genus from Peninsula Valdes in central eastern Argentinean Patagonia, Urophonius martinezi new species, is described. The surface activity period of most of the species of the genus ...
Zarate-Galvez, Kaleb - - 2009
Plesiochactas mitchelli Soleglad 1976 was originally described from a juvenile female collected in "Guatemala" before 1902. The species is redescribed on the basis of an adult female from a specific locality in the state of Chiapas; it is the first record of this species from Mexico.
Rodriguez-Gil, Sergio - - 2009
Meiotic studies on three phylogenetically distant species of the genus Brachistosternus Pocock from Argentina were conducted. One species is from the subgenus Ministernus Francke 1985, B. ferrugineus Thorell 1876, and two species are from the subgenus Brachistosternus Pocock 1893, B. montanus Roig-Alsina 1977 (Andean species group), and morphologically different populations ...
Carlson, B. - - 2009
Temperature can profoundly affect many physiological processes, including muscle performance. Many ectotherms appear sensitive to this relationship, choosing times and locations of activity permitting high body temperatures and, thus, quick escape from predators. High body temperatures, however, can lead to dehydration, which in turn affects muscle performance. Striped bark scorpions ...
McCoy, Victoria - - 2009
The ability to distinguish fossil arthropod carcasses from their molts is necessary for a more complete understanding of the arthropod fossil record and for more accurately assessing the role of fossil arthropods in paleoecosystems. Taphonomic characteristics, e.g., recurrent patterns of disarticulation of exoskeletal elements, are the primary data that have ...
Madrigal-Brenes, Ruth - - 2009
In this paper, we describe the construction and function of the double sheet and tangle web of Tidarren sisyphoides (Walckenaer 1842). Web construction includes several stages: construction of the scaffolding that serves to support the rest of the web; filling in the dome-shaped and horizontal sheets; and construction of the ...
Nieto-Castaneda, Irma - - 2009
When species with similar morphological and ecological characteristics occupy the same habitat, selection should minimize resource competition and promote coexistence by means of spatial partitioning. Competing species might exploit resources at different times or specialize in distinct resources. From July 2005 through May 2006 we examined the niche axes of ...
Foelix, Rainer - - 2009
The tarantula genus Ephebopus is exceptional with respect to its urticating hairs: they are located on the palps rather than on the abdomen, as is the rule for other Neotropical tarantulas. These urticating hairs occupy a small field of 1-2 [mm.sup.2] on the medial side of the palpal femora. Each ...
St'ahlavsky, Frantisek - - 2009
The karyotypes and course of meiosis of two pseudoscorpions, Semeiochernes armiger (Balzan 1892) and Cordylochernes scorpioides (Linnaeus 1758) (Pseudoscorpiones: Chernetidae), are described for the first time. The diploid chromosome number of the male is 69 in S. armiger and 47 in C. scorpioides. As in most pseudoscorpions studied to date, ...
Gonzalez, Alda - - 2009
This study analyzes predation by adult females of Misumenops pallidus (Keyserling 1880) on pairs of prey items representing non-pest insects and potential pests. The phenology of the potential pests was such that each insect guild peaked sequentially, while non-pest herbivorous and insectivorous insects were present during the entire period. Field ...
Wang, Xin-Ping - - 2009
Eight spider species of the genus Coelotes from Central Asia and the Near East currently assigned to the charitonovi species group are described. Four species, Coelotes charitonovi Spassky 1939, C. juglandicola Ovtchinnikov 1984, C. nenilini Ovtchinnikov 1999, and C. turkestanicus Ovtchinnikov 1999 are previously known from both sexes, and four ...
Kuntner, Matjaz - - 2009
Plugging of female genitals via male sexual mutilation is a common sexual repertoire in some nephilid spiders (Herennia, Nephila, Nephilengys), but the behavioral pathways leading to emasculation are poorly understood. Recent work suggests that copulating Herennia males damage their reproductive organs during copulation and then voluntarily, and stereotypically, remove their ...
Slowik, Jozef - - 2009
Geolycosa grandis (Banks 1894) (Araneae, Lycosidae) is redescribed, and illustrations are provided for the first time. We propose that Geolycosa grandis be transferred to the genus Hogna Simon 1885. Hogna permunda (Chamberlin 1904) is synonymized with H. grandis. Notes are given on distinguishing H. grandis from similar species including H. ...
Harari, Ally - - 2009
We used experimental manipulations to test adaptive explanations for the courtship display of the male widow spider, Latrodectus pallidas O. Pickard-Cambridge 1872. Two hypotheses have been suggested to explain a long and complex male display: a) Cooperation of males and females in the effort to physically stimulate the female. As ...
Galvez, Dumas - - 2009
There is controversy about the function of silk stabilimenta, also called silk decorations, on spiders' webs. Most of the proposed hypotheses have been tested using indirect methods. Protection against predators, advertisement for vertebrates to avoid web damage, and increasing prey attraction are the most popular hypotheses. In this study, I ...
- - 2009
Flannery, Maura - - 2009
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