The .rar extension indicates a compressed archive file. Such files often appear in:
Refers to paratype specimens of Corydoras fulleri (catfish). 52508.rar
: Corydoras fulleri (a new catfish species from the Amazon). 52508.rar
: Large document sets, such as the Federal Register or Pillar 3 Disclosures from financial groups, are frequently bundled into archives for download. Summary Table Scientific (Biology) 52508.rar