Scientific classification:
Superdomain: Neomura
Domain: Eukaryota
(unranked): Opisthokonta
(unranked) Holozoa
(unranked) Filozoa
Kingdom: Animalia
Subkingdom: Eumetazoa
(unranked): Bilateria
(unranked): Protostomia
Superphylum: Lophotrochozoa
Phylum: Mollusca
Subphylum: Conchifera
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Angariidae
Genus: Angaria
Species: A. sphaerula

85,5mm
Zamboanga, Philippines

From my collection

via Flickr https://flic.kr/p/2hb9aQE