Archerd Shell Collection > Shell Classes > Gastropoda > Tonnidae


Tonnidae (Tun Shells)


 
Description
The family Tonnidae includes a small number of species with medium-sized to large shells which  are thin for their size, and nearly spherical. The spire is small, while the body whorl is large and well inflated, ending in a very wide aperture. The outer surface is usually sculptured by thick spiral ribs. The animals lack the operculum. Most tun shells can be found living in sand, in the tropics beyond the edge of the coral reef.

Classification

Class: Gastropoda
Clade: Littorinimorpha
Superfamily: Tonnoidea
Family: Tonnidae
 
Major Genera
  • Genus: Eudolium
  • Genus: Malea
  • Genus: Tonna

Tonna galea
(Linnaeus, 1758)
 Giant Tun Shell
(an uncommon shell; 13.0 cm) 


Malea ringens (Swainson, 1822)
Grinning Tun

 


Malea pomum (Linnaeus, 1758)
Pacific Grinning Tun

(from Wilson, 1993)

 

SEE OTHER TUN SHELLS:

Tonnidae
Photo Gallery

 

SEE A LIVE TUN MOLLUSC LAYING A
RIBBONED EGG MASS,
(Paolo Galbano's web site; photos by Roberto Pirrella)

Tonna galea
Giant Tun



Archerd Shell Collection > Shell Classes > Gastropods > Tun Shells