Hystrivasum is an extinct genus of medium-sized fossil predatory gastropods in the family Vasidae.MolluscaBase eds. (2026). MolluscaBase. Hystrivasum Olsson & Petit, 1964 †. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1735907 on 2026-02-13
The species in this genus are known from the Pliocene and Pleistocene deposits of Florida.
Species Species within the genus Hystrivasum include: † Hystrivasum barkleyae Petuch, 1994 Hystrivasum chilesi Petuch, 1994 † Hystrivasum griffini Petuch, 1994 † Hystrivasum hertweckorum Petuch, 1994 Hystrivasum horridum (Heilprin, 1886) † Hystrivasum hyshugari Petuch, 1994 Hystrivasum jacksonense (E. H. Vokes, 1966) † Hystrivasum kissimeense (Hollister, 1971) † † Hystrivasum lindae Petuch, 1994 Hystrivasum locklini (Olsson & Harbison, 1953) † Hystrivasum martinshugari Petuch, 1994 † Hystrivasum olssoni (E. H. Vokes, 1966) † Hystrivasum palmerae (Hollister, 1971) † Hystrivasum schrinerae (Hollister, 1971) Hystrivasum squamosum (Hollister, 1971) † Hystrivasum violetae Petuch, 1994 † Hystrivasum vokesae (Hollister, 1971)
References
E. H. Vokes. 1966. The genus Vasum (Mollusca: Gastropoda) in the new world. Tulane Studies in Geology and Paleontology 5(1):1-35
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