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Arthropods
Invertebrates belonging to the largest phylum of animals, Arthropoda, with an exoskeleton, segmented bodies, and jointed appendages, including many subphyla and classes, such as insects, crustaceans, horseshoe crabs, sea spiders, centipedes, millipedes, and the extinct trilobites.
Subtopics:
Arachnids (1 items)
Crustaceans (11 items)
Insects (20 items)
Trilobites (1 items)
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Results 11 - 30 of 32 listed by similarity [list alphabetically]
Dragonflies and damselflies (Odonata) of the United States [More info]
Manual on dragonflies and damselflies (Odonata), with links to photo thumbnails, checklists, distribution maps, and other Odonata information.
Early Paleozoic biochronology of the Great Basin, western United States [More info]
Publication (PDF format) in three parts on the biostratigraphy and lithostratigraphy of the Ibexian Series in the North American Ordovician, with sections on the southern Egan Range, Nevada and the biostratigraphy of the eastern Great Basin.
PDF Environmental Monitoring and Assessment Program Western Pilot Project - Conditions of North Dakota Perennial Streams for Water Chemistry and Mercury in Fish Tissue, 2000-2003 [More info]
Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for water chemistry and mercury in fish tissue to establish unbiased baseline data.
EverView Data Viewer [More info]
Software and data to help people model the likely response of populations of organisms to various strategies that might be employed to remedy the effects of damaged ecosystems.
Free-living and parasitic copepods (including Branchiurans) of the Laurentian Great Lakes [More info]
Manual of taxonomic keys, location, and descriptive details of free-living and parasitic copepods in the Great Lakes. Viewing requires screen resolution of 1024 x 768 or above.
Invasive crayfish in the Pacific Northwest [More info]
These organisms have negative effects on local ecosystems, but we don't yet know how extensively they have spread. Here is a key to help people identify them.
Mayflies of the United States [More info]
Links to checklists and species maps showing the distribution of mayflies in the United States with links to other information websites on mayflies and reference list.
Nonindigenous aquatic species alert system [More info]
Reports indicating locations where non-indigenous aquatic organisms have been collected. Includes RSS feed you can subscribe to.
Nonindigenous crustacean distribution information [More info]
Descriptions of crustaceans and examples of the deleterious effects of nonindigenous species, with links to distribution maps, species lists and related information on crustaceans.
Nonindigenous Plants and Animals in Florida [More info]
Brief descriptions of programs of research on aquatic nonindigenous plants and animals at the Florida Integrated Science Center with links to descriptions, videos, posters, and reports on various exotic plant and animals species.
North American Pollinator Protection Campaign [More info]
An effort focused on encouraging the health of resident and migratory pollinating animals in North America. USGS participates in the leadership of this effort.
Paleontological analyses [More info]
Links to USGS capabilities in paleontological analyses of fossils such as mollusks, diatoms, palynomorphs, ostracodes, calcareous nannofossils, etc. Includes descriptive information, technique, equipment, and contacts for each fossil group.
Patuxent Wildlife Research Center monitoring projects [More info]
Biomonitoring projects studying the status and trends of the nation's environmental resources and programs studying amphibians and birds. Links to long-term programs, resources and references, and related links.
PDF Plague [More info]
History, pathology, and prospects for this historic disease that is still prevalent in animals and remains a threat to humans.
Pollinators, plants, and prosperity [More info]
Six short news articles about ecological problems faced by pollinator species in various parts of the US. Taken from "People, Land, and Water", the newsletter of the Department of the Interior.
Salvinia molesta, Salvinia weevil, Salvinia minima [More info]
Life history and identification of Salvinia species, a floating, rootless tree fern and a noxious aquatic weed. Site includes posters, instructions on submitting sightings, how to subscribe to a listserv on the weed, and a bibliography.
PDF Southwest Caves Reveal New Forms of Life [More info]
These lightless and nutrient-poor natural systems are home to life forms found nowhere else on Earth. Three new genera and at least 15 new species have been discovered here.
Stoneflies of the United States [More info]
Links to checklists and species maps showing the distribution of stoneflies in the United States with links to other information websites on stoneflies and reference list.
Tiger beetles of the United States [More info]
Links to checklists and species maps showing the distribution of tiger beetles in the United States with links to photographs, other information websites on invertebrates, and reference list.
PDF Toxicity and bioavailability of metals in the Missouri River adjacent to a lead refinery [More info]
Report (PDF format) on an evaluation of the potential environmental impacts of contaminated ground water from a metals refinery adjacent to the Missouri River in Omaha, Nebraska testing water and sediments for contaminants and toxicity.
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