Guildfordia ostarrichi is an extinct species of sea snail, a marine gastropod mollusk, in the family Turbinidae, the turban snails.MolluscaBase (2018). Guildfordia ostarrichi Pacaud, 2017 †. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=987966 on 2018-12-28Pacaud J.M. (2017). Astrangaria, un nouveau genre d’Angariidae (Mollusca, Gastropoda) des calcaires daniens (Paléocène inférieur) du bassin de Paris. Xenophora Taxonomy. 15: 3-8.
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