Home > Invertebrates > Shells > Turbinate Shells

Updated 1/29/2014

Family Trochidae

Top Snails

Tops are herbivorous snails that possess a thin yellow-brown operculum.  The shell's interior is lined with mother-of-pearl.

 

HAWAII

Trochus intextus

HAWAIIAN or WOVEN TOP SNAIL

 


INDO-PACIFIC

Tectus pyramis

PYRAMID or GREEN TOP SHELL

 


CALIFORNIA

Norrisia norrisi

NORRIS' TOP SHELL

 



Family Turbinidae

Turbans

Turbans are herbivorous snails that possess a thick calcareous operculum called a 'cat's eye'.  The interior is lined with mother-of-pearl.

HAWAII

Turbo sandwicensis

HAWAIIAN TURBAN   

 

Collonista verruca

WARTY TURBAN

 

Collonista rubricincta

RED-BANDED TURBAN

 


CALIFORNIA

Megastraea undosa

WAVY TURBAN

 



Family Calliostomatidae

Shells have a chitinous operculum and until recently this group was a subfamily of the Trochidae.

NORTHEAST PACIFIC

Calliostoma ligatum

WESTERN RIBBED or BLUE TOP SHELL

 

Calliostoma annlatum

BLUE-RING TOP SHELL



Family Modulidae

Modular Snails

Modulids are herbivorous snails that possess a strong peg-like tooth on the columella.  One species occurs in Hawaii.

HAWAII

Modulus tectum

 

KNOBBY SNAIL

 



Family Vanikoridae

Vanikoro snails

Vanikorids are small carnivorous snails rarely encountered alive in rubble or dead coral.  They have a turbinate shell with an umbilicus, thin operculum, and hairy periostracum.  Four species occur in Hawaii.

 HAWAII

Vanikoro cancellatus

CANCELLATE VANIKORO