Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"species descriptions"”.
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MODERN MORPHOLOGICAL TECHNIQUES AND THE EVOLUTIONARY BIOLOGY AND TAXONOMY OF SEPSIDAE (DIPTERA)
… reference collection featuring 140 sepsid species and publishing species descriptions simultaneously featured as entries in a wiki-based platform. Lastly, I show how morphological data-richness and iterative taxonomy can address inadequately diagnostic species descriptions and resolve …
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The characterisation of actinomycetes isolated from diverse South African sources, with emphasis on the genus Kribbella
… Micromonospora strains. Two novel Kribbella species were isolated from soil samples and the species descriptions of Kribbella karoonensis Q41T and Kribbella swartbergensis HMC25T were published in 2006.
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Taxonomy and Evolution of the Buckthorn Family (Rhamnaceae) in Southeast Asia
… diverse regions, with 50,000 flowering plant species recognised and an estimated 10,000 more that have yet to be scientifically documented. My research contributes to filling this knowledge gap by documenting plants in the Rhamnaceae family from Southeast Asia. Except for Flora of Thailand, …
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A re-assessment of the species boundaries in Merciera A.DC.
… in the genus Merciera A.DC. to re-assess the species boundaries. This study differs from previous studies in the genus because it employs multivariate statistical methods. Vegetative and floral characters obtained from herbarium specimens were analyzed. The results of the cluster analysis and …
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The systematics and uses of the genus Ipomoea (Convolvulaceae) of Oaxaca, Mexico
… its classification on generic, subgeneric, and species levels. A second facet of the investigation involves an ethnobotanical survey on past and present nutritional, medicinal, and shamanic uses of these plants. The taxonomic study involved acquisition of herbarium materials from various sources …
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Revisão do gênero Aspidobothrus Reuter, 1907 com ênfase na genitália externa de machos e fêmeas (Hemiptera: Miridae)
… with a detailed study of the present eight species. Descriptions of the genus, species and genital structures of males and females were made, including measurements of the series and also general considerations are provided. The genital structures, showing specific differences, are …
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Systematic studies of some pseudoscorpions (Arachnida: Pseudoscorpionida) from the southeastern United States
… specimens were studied and the following species were identified: Verrucaditha spinosa, Mundochthonius sandersoni, Apochthonius moestus, Apochthonius barbarae, sp. n., Kleptochthonius (Kleptochthonius) crosbyi, Kleptochthonius (Kleptochthonius) multispinosus, Kewochthonius paludis, …
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Contributions to the taxonomy of South African hermit crabs (Crustacea: Decapoda: Paguroidea) – integrating microCT scanning and barcoding
… the marine benthos and globally more than 1,200 species have been described. In the unique bioregion of South Africa, hermit crabs are poorly known, and the last taxonomic revision of the group was that of K. H. Barnard in 1950, who recorded only 32 species. This study combines morphological …
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The Ephemeroptera Larvae of Guatemala
… compared to previously published records and descriptions of North, South, and Central American species. Descriptions are provided for specimens which do not coincide with those of previously known taxa. Descriptions are also included of collected species which have been previously documented …
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Revision of the Genus Hylaeus Fabricius (Hymenoptera: Colletidae) in Canada
… face and thorax, including the legs. However, species-level identification is difficult due to the maculations of many species being highly variable with respect to shape and size, often resulting in high degrees of similarity between and among species. I use a combination of morphological and …
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Walleye dermal sarcoma virus Orf C: a potential oncolytic therapy
… Say was reviewed. Five previously described species are recognized as valid: affinis, foveolatus, hirsutus, humeralis, and maculosus. One new species, tumulosus, from Texas is described as new. The following new synonymy is proposed: longior LeConte 1856 (= affinis LeConte 1856) and albidus …
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The stonefly genus Isogenoides Klapálek (Plecoptera: Perlodidae) of North America: Systematics, behavior and ecology.
… morphology and behavioral lines of evidence. Species keys are provided for all life stages. One species, I. krumholzi (Ricker) is considered a synonym of I. doratus (Frison). Detailed species descriptions are provided for males, females, nymphs and ova. Distributions are updated utilizing all …
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Phytophthora diversity in the Cape Floristic Region
… surveillance for the emergence of Phytophthora species are critically needed in South Africa. Therefore, the major aims of the research conducted in this thesis were to: 1) reveal the diversity and potential threats of Phytophthora species already present within the Cape Floristic Region, and 2) …
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Evolution in biological radiations; insights from the Triassic archosaur radiation
… mass extinction, these reptiles were both species poor and ecologically limited, but by the Late Triassic they dominated terrestrial ecosystems in both species abundance and ecological breadth. However, continued environmental instability following the end-Permian extinction has led to the …
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Confirming the status of Lancashire’s endemic freshwater Nemertean – Prostoma jenningsi
… with losses occurring among many native UK species. P. jenningsi (known locally as the ‘Croston Worm’), is considered to be Lancashire’s only endemic species, thought to exist solely in the Clay ‘Ole, Bretherton; however, its existence at the site has not been confirmed since 1999. Endemic …
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Conserving the iconic and highly threatened mahseer fishes of South and Southeast Asia.
… and represent flagship and umbrella focal species for the sustainable management of river systems throughout their biogeographic range. Based on research conducted since 2012, considerable advances in the taxonomic and human dimension aspects of mahseer conservation have been acheived. …
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Biodiversity and Biogeography of Amphipod Crustaceans
… context. This thesis first assessed trends in species descriptions across all, benthic, pelagic, marine, freshwater, and subterranean amphipods. The prediction of the number of amphipod species remaining to be described, the taxonomic effort indicators, the number of single and multiple …
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Molecular phylogenetics, taxonomy and niche-based conservation risk assessment of Thesium L. (Santalaceae)
… L. (Santalales: Santalaceae) is a large (360 species) genus of hemiparasitic perennial or annual species with a mainly Old-World distribution and a greatest concentration in southern Africa (ca. 186 species). Although Thesium is a major component of southern African flora, it often goes …