Home > Invertebrates > Shells > Augers > Duplicaria costellifera

Updated 8/24/2025

Family Terebridae

HAWAII - ENDEMIC

Duplicaria costellifera 

Kewalo, Oahu, 90 feet

 

  

THAANUM'S AUGER

Uncommon in sand deeper than 80 feet.  Whorls more inflated and ribs stronger than Oxymeris gouldi.  Attains 4 inches.   Endemic to Hawaii.  Formerly known as Terebra thaanumi.