![]() ![]() Although the TDWG system is now out of date for some parts of the world, as there is no suitable alternative system available, the BRU's are used to subdivide very large countries (such as Australia, Brazil, China, South Africa, the Russian Federation, the United States of America, etc.) into smaller, more conveniently sized units for recording distributions. The TDWG geographic system also provides a standard set of Basic Recording Units (BRU), which refer to sub-country units based on provinces or states. 2001) prepared for the Biodiversity Information Standards, also known as the Taxonomic Databases Working Group (TDWG). The naming of such islands or territories follows the second edition of the World Geographical Scheme for Recording Plant Distributions (Brummitt et al. In the case of species that inhabit islands or territories significantly far from the parent country, the island or territory name is provided in parentheses for example, "Spain (Canary Islands)". Unless geographically very remote from each other, islands and other territories are included with the parent country. In Red List assessments, the Geographic Range is recorded using the countries of occurrence following the standard names of countries provided and maintained by the United Nations Statistics Division and the country names and codes maintained by the International Organization for Standardization ISO-3166-1 country codes standard. Tools - Assessment Tools Countries and Regions used in the Red List ![]()
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