Current name: Hydnocystis Tul. & C. Tul., Giornale Botanico Italiano 1 (2): 59 (1845) [MB#2400] Taxonomic synonyms: - Stephensia Tul. & C. Tul., Comptes Rendus Hebdomadaires des Séances de l'Academie des Sciences 21: 1433 (1845) [MB#5214] - Densocarpa Gilkey, North American Flora 1: 15 (1954) [MB#1460] - Elderia McLennan, Proceedings of the Royal Society of Victoria 74: 113 (1961) [MB#1755] - Protogenea Kobayasi, Transactions of the Mycological Society of Japan 4: 119 (1963) [MB#4386]