The shells from Sepandjang are in Chicago Natural History Museum, no. 97808, in the Zoological Museum in Amsterdam, and in Butot; Djukung specimens are in the Zoological Museum in Amsterdam; and topotypes from Bajutan are in Chicago Natural History Museum, no. 97806, and in Butot and the Zoologisch Museum, Amsterdam, Some additional material from Kangean Island (USNM 468416, Paravicini!) was seen after the description had been written.
The paratype (USNM 885787), a juvenile specimen of 49 mm ML, was found in the stomach of a lancetfish (Alepisaurus ferox).
The holotype, known as USNM 7448, is a worn and broken tooth found from Phoebus Landing on the Cape Fear River in North Carolina.
The only known specimen (USNM 16809), a distal right tarsometatarsus end, was found in the Cooper River near Drum Island at Charleston, South Carolina (USA).