Hippothoa flagellum is recorded from the Late Tertiary and Recent, with a wide distribution. The illustrated specimen was from Beaumaris, near Melbourne, Australia, in a water depth of 1 m.
Original description: Hippothoa flagellum Manzoni, 1870
Locality: Italy (Pliocene)
Type specimen:
Description from Gordon, 1989.
Description from Tilbrook, Hayward & Gordon, 2001. (PDF file)