title: Collonia
text: # Collonia
  
  Collonia is a genus of small sea snails with calcareous opercula, marine gastropod mollusks in the family Colloniidae.
  
  ## Species
  
  Species within the genus Collonia include:
  
  * Collonia admissa (E. A. Smith, 1890)
  * Collonia donghaiensis Dong, 1982
  * Collonia granulosa Pease, 1868
  * Collonia incerta (E. A. Smith, 1890)
  
  ### The following species were brought into synonymy
  
  * Collonia gestroi Caramagna, 1888: synonym of Yaronia gestroi (Caramagna, 1888)
  * Collonia maculosa Pease, 1868: synonym of Homalopoma maculosa (Pease, 1868)
  * Collonia munda H. Adams, 1873: synonym of Bothropoma mundum (H. Adams, 1873)
  * Collonia purpurescens Dunker, 1882: synonym of Homalopoma amussitatum (Gould, 1861)
  * Collonia quantilla Gould, 1861: synonym of Homalopoma quantillum (Gould, 1861)
  * Collonia rosa Pilsbry, 1904: synonym of Neocollonia pilula rosa (Pilsbry, 1904)
  