Main  features  of  the  family : 

The  shells  of  this  large  family  ( several  hundred  species  world - wide )  are  conical  
with  several  whorls  and  a  round  aperture.  Most  top  shells  are  herbivores. 
High - spired  species  tend  to  live  in  calm  water.  Low - spired  species  are  often  
found  where  wave  action  is  strong. 

12  species  of  top  shells  have  been  recorded  from  the  Galápagos  Islands.

List  of  genera  and  species  known  from  the  Galápagos

      Calliostoma  leanum  ( C.B. Adams, 1852 )

      Calliostoma  mcleani  Shasky  &  Campbell, 1964

     Calliostoma  santacruzanum  McLean, 1970

CALLIOTROPIS        ( 1 species )

      Calliotropis  galapagana  ( Dall, 1908 )

SOLARIELLA        ( 2 species )

       Solariella  diomedea  Dall,  1919

       Solariella  tavernia  Dall,  1919

TEGULA        ( 2 species )

       Tegula  cooksoni  ( E.A. Smith, 1877 )

       Tegula  snodgrassi  ( Pilsbry  &  Vanatta,  1902 )

VETULONIA        ( 1 species )

       Vetulonia  galapagana  Dall,  1913