†Gibbula (Gibbula) engebiensis Ladd 1966 (top snail)
Gastropoda - Trochoidea - Trochidae
Full reference: H. S. Ladd. 1966. Chitons and Gastropods (Haliotidae through Adeorbidae) from Western Pacific Islands. United States Geological Survey Professional Paper 531:1-98
Belongs to Gibbula (Gibbula) according to H. S. Ladd 1966
Sister taxon: Gibbula (Gibbula) kahtanenesis
Type specimen: USNM 648264, a shell
Ecology: epifaunal grazer
Average measurements (in mm): shell 2.90 x 2.90