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 330 for “"New species"”.
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New Species and Phylogeny of the Genus Phytophthora
… important plant pathogens. Characterization of new Phytophthora species is the first and a most critical step to understanding their biology, ecology and economic importance. Six novel Phytophthora species recovered from irrigation systems at ornamental plant nurseries in Mississippi and …
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Trypanosoma barbari, a new species from the newt Triturus torosus
… of' obtaining specimens of this Pacific Coast newt, and of the eight animals examined six were parasitized. Contrary to the primary observations, evidence was accumulated which proved beyond any doubt that the flagellate is polymorphic and that, evidently, it has not been reported or described. …
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Gigantorhynchus orticei a new species (Acanthocephala) from a Peruvian marsupial
Two species of Acantopcephala of the genus <i>gigantorhynchus</i> (<i>G. echinodiscus, G. Lutzi</i>) are considered with relation to the proposed new species, <i>Gigantorhynchus orticei</i>, found in the intestine of <i>Metachirus nudicaudatus</i> from Peru, South America. The specific name is …
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Aquatic Hyphomycetes, including Heliscus tentaculus, new species, on decaying angiosperm materials
… area of Montgomery County, Virginia, 13 species representing II genera were found. The species were described, and sporogenesis in each species was discussed. One species, heliscus tentaculus, had not been described previously, and was proposed as a new species. The methods and techniques …
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A discussion of the Cytherinae (Ostracoda) with description of two new species
… paper is concerned with the description of two new ostracod species, and the discussion of their affinities with other species in the subfamily Cytherinae. In this discussion reference is made to the morphological features of several genera. At this point it must be made clear that although the …
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Studies on Bucephalid cercaria including a new species from the Dillon Beach area
… extremity; gonads posterior and vitellaria species live in the gut of marine and fresh-water fishes. The metacercariae are found encysted beneath the skin or in the nervous system of other fishes serving as second intermediate hosts. Sporocysts and cercariae have been recovered from a …
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The Parataxonomist Revolution : how a group of rural Costa Ricans discovered 10,000 new species
… has been inventorying butterfly and moth species for 30 years. Just as a paramedic provides a first round of medical care, a parataxonomist does the on-the-ground work of taxonomy-collection, preparation and data gathering-before sending a specimen on to be analyzed. The parataxonomy …
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Studies on the morphological and physiological characters of a new species of the genus Paecilomyces
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Bacteriology and Public Health, 1947
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Taxonomic Revision of the Pirate Perches (Percopsiformes: Aphredoderidae) Reveals Three New Species and Elevates Two Subspecies
… high fish diversity among temperate latitudes. Species richness and endemism in this region is commonly attributed to historic biogeographic processes dating back to the Pliocene or earlier, and influences of sea levels through a relatively old though stochastic landscape and drainage basins. …
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The fungi and bacteria associated with three tree-killing beetles: from new species to complex communities.
… galleries in Minnesota. Additionally, four new species of Ophiostomatales are described and a new classification for one of the eastern larch beetle associates is proposed. The red turpentine beetle (Dendroctonus valens) is also a native bark beetle to North America and acts mostly as a …
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Life cycle studies on Stephanostomum pacificum, a new species of trematode, from the Pacific Marine Station area
<p>This report summarizes the results of a study on the life cycle of a member of the trematode family Acanthooolpidae, genus Stephanostomum Looss, 1899, which was carried on during the summers of 1948, 1949, 1951, and the winter of 1948-49 at the Marine Station of the College or the Pacific at …
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Molecular phylogenetics of the North American stoneflies (Insecta: Plecoptera), with description of a new species and family
… Plecoptera. Live adult specimens, including 132 species across 92 of the 109 described North American genera, were collected from the United States and Canada. A total of 1400 orthologous genes selected from transcriptomes were used in maximum likelihood (ML) and multispecies coalescent (msc) …
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The tardigrada of southwest Virginia: with the addition of a description of a new species from Florida
… 694 specimens were obtained and the following species were identified: Batillipes friaufi sp. n., Echiniscus (Hypechiniscus) gladiator, Echiniscus (Echiniscus) virginicus sp. n., Pseudechiniscus suillus, Macrobiotus macronyx, Macrobiotus intermedius,Macrobiotus richtersi, Macrobiotus …
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A New Species of Teleoceras from the Late Miocene Gray Fossil Site, with Comparisons to Other North American Hemphillian Species
… of post-cranial elements from 3 Hemphillian species of <em>Teleoceras </em>suggest that these differences should not be used to separate species. However, the elements do typically sort well by fossil locality, which suggests that post-cranial morphology is plastic enough to become modified …
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