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Biodiversity Programs
This site by the National Museum of Natural History of the Smithsonian Institution contains a vast amount of information about their studies in Systematics, Evolution and Ecology.

Convention on Biological Diversity
Adopted at the Earth Summit (Rio de Janiero) in 1992, the Convention established three main goals: the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of the benefits from the use of genetic resources.

Integrated Taxonomic Information System (ITIS)
An easily accessible database with reliable information on species names and their hierarchical classification. Includes documented taxonomic information of flora and fauna from both aquatic and terrestrial habitats.

International Code of Botanical Nomenclature
The new St. Louis code adopted in 1999.

Investigate Biodiversity
From Conservation International, this site contains links to online expeditions, science project how-to's, resources, and basics. Excellent site, especially for children.

Journey into Phylogenetic Systematics
Find out how biologists reconstruct the pattern of events that led to the diversity of life, and learn why this is so important.

Kew Record of Taxonomic Literature
Easy to use search engine for references relevant to the taxonomy of flowering plants, gymnosperms, and ferns.

Phylogenetic Inference Package (PHYLIP)
A free package of programs for inferring phylogenies. Methods include parsimony, distance matrix, and likelihood methods. Handles molecular sequences, gene frequencies, restriction sites, etc.

Species 2000
A British attempt to index the scientific names of all known species.

This is a relational database of phylogenetic information. Store phylogenetic trees and the data matrices that generate them.

Tree of Life Home Page
Information about the diversity of organisms, their history and characteristics linked together in the form of an evolutionary tree.