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Articles 10381 - 10410 of 10956
Full-Text Articles in Entire DC Network
End Matter, Vol. 17 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Labidocarpid Bat-Mites Of Venezuela (Listrophoroidea: Labidocarpidae), Burruss Mcdaniel
Labidocarpid Bat-Mites Of Venezuela (Listrophoroidea: Labidocarpidae), Burruss Mcdaniel
Brigham Young University Science Bulletin, Biological Series
Nine species of bat-mites representing six genera of the family Labidocarpidae are recorded from Venezuela. The genus Pseudoalabidocarpus is described as new and contains a single species, P. secus, new species, collected from Phyllostomus elongatus and P. discolor. Two other new species are described: Lawrenceocarpus phyllostomus, new species, collected from Phyllostomus elongatus and Micronycteris hirsuta; and Labidocarpus dossuarius, new species, collected from Molossus major. New distribution and host records from Venezuela include: Alabidocarpus furmani on Glossophaga longirostris, Carollia perspicillata, C. brevicauda, Vampyrops helleri, Anoura caudifera and Pteronotus parnellii; A. nicaraguae on Uroderma magnirostrum; A. jonesi on Vampyrops helleri; Parakosa tadarida …
Venezuelan Amblyopinini (Insecta: Coleoptera; Staphylinidae), C. E. Machado-Allison, Alfredo Barrera
Venezuelan Amblyopinini (Insecta: Coleoptera; Staphylinidae), C. E. Machado-Allison, Alfredo Barrera
Brigham Young University Science Bulletin, Biological Series
Eight species of the tribe Amblyopinini are known from Venezuela. The descriptions of five species (Amblyopinus proximus, A. intermedius and A. metasternalis plus Amblyopinodes major and A. venezolanus) are given in this paper. Megamblyopinus seeversi Machado-Allison and Barrera is placed in the genus Amblyopinus and A. bolivari Barrera, Machado-Allison and Muñiz is reduced to a subspecies of A. schmidti Seevers. Data on hosts and distribution are given for the new species as well as A. emarginatus Seevers and A. waterhousei Fauvel.
Contributions To The Study Of The Genus Eriastrum: Ii. Notes Concerning The Type Specimens And Descriptions Of The Species, H. Keith Harrison
Contributions To The Study Of The Genus Eriastrum: Ii. Notes Concerning The Type Specimens And Descriptions Of The Species, H. Keith Harrison
Brigham Young University Science Bulletin, Biological Series
The species of the genus Eriastrum are described. Keys to the species and subspecies and the geographic ranges are provided. Discussions with regard to the type specimens or lectotypes and interspecific relationships are presented.
End Matter, Vol. 17 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 17 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Sucking Lice Of Venezuelan Rodents With Remarks On Related Species (Anoplura), Phyllis T. Johnson
Sucking Lice Of Venezuelan Rodents With Remarks On Related Species (Anoplura), Phyllis T. Johnson
Brigham Young University Science Bulletin, Biological Series
The paper includes discussions and descriptions of species of Anoplura known to occur on Venezuelan rodents, and of certain other taxa related to Venezuelan forms. Five genera are represented: Enderleinellus Fahrenholz—2 species: insularis Werneck and venezuelae Ferris; Hoplopleura Enderlein—19 species, 11 of them new: sciuricola Ferris; arizonensis Stojanovich and Pratt; aitkeni, new species; travassosi Werneck; abeli, new species; rimae, new species; angulata Ferris; indiscreta, new species; tiptoni, new species; handleyi, new species; eximia, new species; quadridentata (Neumann); contigua, new species; nesoryzomydis Ferris; oryzomydis Pratt and Lane; multilobata Werneck; splendida, new species; inusitata, new species; and orinocoi …
Mites Of The Family Laelapidae In Venezuela (Acarina: Laelapidae), Deane P. Furman
Mites Of The Family Laelapidae In Venezuela (Acarina: Laelapidae), Deane P. Furman
Brigham Young University Science Bulletin, Biological Series
This publication presents the results of an extensive survey of symbiotic laelapid mites of vertebrates from Venezuela. Over 40,000 vertebrates were examined from a wide variety of life zones and localities. The laelapid fauna represented includes 1 new genus, Hymenolaelpas, and 7 genera previously described: Laelaps, Mysolaelaps, Tur, Steptolaelaps, Neoparalaelaps, Gigantolaelaps, and Androlaelaps. The genera are represented by 51 species and subspecies, of which 8 are described as new. Previously unknown males and immatures of several species are described. Gigantolaelaps versteegi ( Oudemans ) is redescribed from type material; G. wolffsohni (Oudemans) is redescribed from Oudemans’ original material; G. peruviana …
Front Matter, Vol. 17 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 6
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 17 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 16 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
New World Polyctenidae (Hemiptera), With Special Reference To Venezuelan Species, Norihiro Ueshima
New World Polyctenidae (Hemiptera), With Special Reference To Venezuelan Species, Norihiro Ueshima
Brigham Young University Science Bulletin, Biological Series
There are seven species of the polyctenid genus Hesperoctenes which occur in Venezuela. Six of these species are reported in this paper. H. longiceps (Waterhouse) is redescribed. Data on distribution and hosts and a key to the 15 species of the genus Hesperoctenes are given.
End Matter, Vol. 17 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 17 No. 5
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Ticks Of Venezuela (Acarina: Ixodoidea) With A Key To The Species Of Amblyomma In The Western Hemisphere, Eleanor K. Jones, Carleton M. Clifford, James E. Keirans, Glen M. Kohls
Ticks Of Venezuela (Acarina: Ixodoidea) With A Key To The Species Of Amblyomma In The Western Hemisphere, Eleanor K. Jones, Carleton M. Clifford, James E. Keirans, Glen M. Kohls
Brigham Young University Science Bulletin, Biological Series
Forty-nine species in 2 families and 10 genera are recorded for Venezuela. A key to the species of Amblyomma in the Western Hemisphere is given. Host and locality records are provided for each species. No new species are reported but the following 17 species are new for the fauna of Venezuela: Autricola silvai Cerný, 1967, Ornithodoros boliviensisO. brodyi Matheson, 1935, O. puertoricensis Fox, 1947, O. rossi Kohls, Sonenshine and Clifford, 1965, O. stageri Cooley and Kohls, 1941, O. yumatensis Cooley and Kohls, 1941, O. marinkellei Kohls and Clifford, 1969, O. viguerasi Cooley and Kohls, 1941, Amhblyomma extraoculatum Neumann, 1899, A. …
End Matter, Vol. 17 No. 6
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Venezuelan Nycteribiid Batflies (Diptera: Nycteribiidae), Lindolpho R. Guimarães
Venezuelan Nycteribiid Batflies (Diptera: Nycteribiidae), Lindolpho R. Guimarães
Brigham Young University Science Bulletin, Biological Series
Eleven species of Nycteribiidae, all belonging to the genus Basilia, are reported from Venezuela. Of these, two (tuttlei and typhlops) are described as new and four (anomala, dubia, juquiensis, and tiptoni) are recorded for the first time. B. anomala is the first species with three tergal plates to be found in South America. Synonymies, previous localities, and host records are given for all species, as well as new records and comments. Geographical distribution and host-parasite associations are discussed. Field parties of the Smithsonian Venezuelan Project obtained the material on which this paper is based.
Front Matter, Vol. 17 No. 5
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 16 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Bionomics And The Influence Of Diet Upon The Maturation Of Orchopeas Leucopus (Baker), Lynden Phillip Baum
Bionomics And The Influence Of Diet Upon The Maturation Of Orchopeas Leucopus (Baker), Lynden Phillip Baum
Theses and Dissertations
Knowledge of the bionomics of plague vectors, es-pecially factors which influence life history, host pre-ference, and fluctuations of flea populations, are basic to an understanding of plague ecology. Orchopeas leucopus (Baker), an ectoparasite of cricetid rodents such as Peromyscus maniculatus (Wagner), and Peromyscus truei (Baird), is a vector of plague in the western United States (Holdenried and Morlan, 1955). In a study of nine biotic corrnnunities in the Utah portion of the Great Basin, P. maniculatus was the most abundant rodent in seven of the biotic corrnnunities (Olsen, 1966). Because of the ubiquitous nature of P. maniculatus an interchange of …
Population Dynamics Of Fleas (Siphonaptera) On The Uinta Ground Squirrel, Spermophilus Armatus Kennicott, Dennis I. Anderson
Population Dynamics Of Fleas (Siphonaptera) On The Uinta Ground Squirrel, Spermophilus Armatus Kennicott, Dennis I. Anderson
Theses and Dissertations
The Uninta ground squirrel, Spermophilus armatus Kennicott, is the most abundant diurnal rodent in the Wasatch Mountains at the 7,000-9,000 foot level particularly in the campgrounds and picnic areas. Contact between man and the Uninta ground squirrel may be hazardous inasmuch as the causative agent of plague has been isolated from S. armatus and its flea parasites (Public Health Reports, 1937, 1938a, 1938b; Meyer, 1938; Byington, 1940; Allred, 1951; and Beck, 1955). Since these fleas are vectors of sylvatic plague and potential vectors of human plague, detailed knowledge about their population dynamics is desirable.
Embryology And Larval Development Of Acteon Punctocoelata (Carpenter) (Gastropoda, Opisthobranchiata), Scott E. Brown
Embryology And Larval Development Of Acteon Punctocoelata (Carpenter) (Gastropoda, Opisthobranchiata), Scott E. Brown
Theses and Dissertations
Acteon (Rictaxis) punctocoelata (Carpenter) is a primitive opisthobranch mollusc found sporadically in central California bays. The primitive nature of this genus is indicated both geologically and morphologically (Fretter and Graham, 1954 and Morton, 1958). This micro-phagous browser burrows just below the surface of the sandy mudflats, as do its close relatives Harninea, Scaphander, and Philine (Fretter and Graham, 1954). Its strong, sculptured external shell is approximately 1/2 inch long and is encircled with narrow black· bands that follow the whorls around the white shell (Fig. 1).
A Quantitative And Ecological Survey Of The Algae Of Huntington Canyon, Utah, Lorin E. Squires
A Quantitative And Ecological Survey Of The Algae Of Huntington Canyon, Utah, Lorin E. Squires
Theses and Dissertations
A quantitative and ecological study of the algal flora of Huntington Canyon, Emery Co., Utah was conducted from March 1971 to April 1972. Data were collected concerning net plankton, nannoplankton, periphyton and visible attached algae. Certain physical and chemical parameters in the waters of Huntington Creek and a small pond along its course also were measured. The algal flora of Huntington Canyon contains a wide diversity of genera and species. Diatoms are the main constituent of the flora of this stream throughout the year. Hydrurus foetidus is prevalent in the creek in Huntington Canyon from late winter to early summer, …
The Distribution Of Meyenia Fluviatilis At Lincoln Beach Area Of Utah Lake With Notes On Seasonal Occurrence Of Gemmules, Chadwick E. Smith
The Distribution Of Meyenia Fluviatilis At Lincoln Beach Area Of Utah Lake With Notes On Seasonal Occurrence Of Gemmules, Chadwick E. Smith
Theses and Dissertations
This study of the distribution of the fresh-water sponge, Meyenia fluviatilis, at the Lincoln Beach area of Utah Lake involved the following: First, sampling of the area for the presence or absence of the species. Second, sampling at two separate areas at different depth intervals to determine if the number of sponge colonies and colony size were in any way related to depth. Finally, monthly sampling at one area to determine when gemmules of M. fluviatilis were present in the sponge colonies. Meyenia fluviatilis was found to be commonly distributed in 1-2 m of water on the lower surface of …
The Effects Of Channelization And Water Impoundment On The Macroinvertebrates In The Weber River, Summit County, Utah, Parley V. Winger
The Effects Of Channelization And Water Impoundment On The Macroinvertebrates In The Weber River, Summit County, Utah, Parley V. Winger
Theses and Dissertations
Macroinvertebrate populations in the Weber River, Summit County, Utah, were analyzed to determine what effects channelization resulting from Interstate-80 construction and water impoundment had on the standing crop, species diversity and species composition. Bottom samples were collected monthly from riffle areas in channeled and unchanneled sections and above Echo and Wanship Reservoirs. Macroinvertebrate populations in the channeled areas were similar in standing crop, species diversity and species composition to those in unchanged areas within six months following channelization. Species diversities were higher (d=4.1, 3.7) above the reservoirs than below (d=2.0). The reservoirs restricted the distribution of several species of macroinvertebrates. …
Lipids Of Fungal Spores, Identification And Metabolism, Jim L. Bushnell
Lipids Of Fungal Spores, Identification And Metabolism, Jim L. Bushnell
Theses and Dissertations
The lipids of the spores of the Basidiomycetes: Ustilago bullata, Lycoperdon perlatum and Calvatia gigantea were investigated. The spores of U. bullata were found to have hydrocarbons ranging from C_9 to C_24, methyl esters of fatty acids ranging from C_14 to C_24, and free fatty acids from C_14 to C_24. The spores of L. perlatum were found to have few hydrocarbons (C_22 being the predominent one); no methyl esters were detected and the fatty acids were from C_15 to C_18. Long chain aldehydes (C_30) were also detected in low concentration. At the ultrastructural level the Lycoperdon spores were found to …
Laboratory Rearing, Development And Cytogenetics Of Orchopeas Leucopus (Baker), Robert Francis Allen
Laboratory Rearing, Development And Cytogenetics Of Orchopeas Leucopus (Baker), Robert Francis Allen
Theses and Dissertations
Vector control is fundamental to the suppression and/or eradication of many endemic and epidemic diseases affecting man. The discovery and widespread application of insecticides in vector control programs focused early attention on studies revealing ecological and behavioral characteristics of arthropod vectors. As a consequence of this emphasis, few attempts were made to investigate arthropod cytogenetics. However, recent recognition of the deleterious effects of highly persistent insecticides on the environment and the development of insecticide resistance by vectors of human disease have established the importance of cytogenetics as a base on which programs for control of vector populations may be built …
Raptor Predation On Pocket Gopher Populations By The Use Of Hunting Perches, Robert C. Christensen
Raptor Predation On Pocket Gopher Populations By The Use Of Hunting Perches, Robert C. Christensen
Theses and Dissertations
The Northern Pocket Gopher (Thomomyst alpoides) is common on open range lands at high altitudes, and range management personnel have long been confronted with the problem of controlling gopher populations. Although some studies indicate that pocket gophers have little or no injurious effects on range in good condition, other studies show that large populations of these animals can seriously damage seeded ranges and ranges in poor condition (Colorado State University Exp, Stat., 1960). Julander, Low, and Morris (1969) indicate that in areas where gophers have reached populations of 27-39 gophers per acre, forage removal by gophers may be from 4.75 …