Weevils are beetles belonging to the superfamily Curculionoidea, known for their elongated snouts. They are usually small – less than .mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .den{vertical-align:sub}.mw-parser-output .sr-only{border:0;clip:rect ;clip-path:polygon ;height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}6 mm in length – and herbivorous. Approximately 97,000 species of weevils are known. They belong to several families, with most of them in the family Curculionidae . It also includes bark beetles, which while morphologically dissimilar to other weevils in lacking the distinctive snout, is a subfamily of Curculionidae. Some other beetles, although not closely related, bear the name "weevil", such as the biscuit weevil , which belongs to the family Ptinidae.