Basionym: Peziza amorpha f. acuum Alb. & Schwein., Conspectus Fungorum in Lusatiae superioris: 330 (1805) [MB#529674] Obligate synonyms: - Phialea acuum (Alb. & Schwein.) Rehm, Rabenhorst's Kryptogamen-Flora, Pilze - Ascomyceten 1(3): 717 (1896) [MB#446021] - Discocistella acuum (Alb. & Schwein.) Svrcek, Ceská Mykologie 16 (1): 12 (1962) [MB#330128] - Peziza acuum (Alb. & Schwein.) Fr., Systema Mycologicum 2: 330 (1805) [MB#185957] - Cistella acuum (Fr.) Raitv., Sistematiki i Rasprostranenie Gribov: 148 (1978) [MB#118505] - Lachnella acuum (Alb. & Schwein.) W. Phillips, A manual of the British Discomycetes: 246 (1887) [MB#154680] - Helotium acuum (Alb. & Schwein.) Fr., Summa vegetabilium Scandinaviae 2: 355 (1849) [MB#234621] - Hyaloscypha acuum (Alb. & Schwein.) Velen., Monographia Discomycetum Bohemiae: 278 (1934) [MB#255806] - Clavidisculum acuum (Alb. & Schwein.) Kirschst. (1938) [MB#433608] - Lachnum acuum (Fr.) anon. (?) [MB#438546] - Hymenoscyphus acuum (Alb. & Schwein.) J. Schröt., Kryptogamen-Flora von Schlesien 3-2(7): 75 (1893) [MB#453751] - Dasyscyphus acuum (Alb. & Schwein.) Sacc., Sylloge Fungorum 8: 443 (1889) [MB#119769] - Atractobolus acuum (Alb. & Schwein.) Kuntze, Revisio generum plantarum 3 (3): 445 (1898) [MB#523278] - Helotium acuum var. acuum (Alb. & Schwein.) Fr.: 355 (1849) [MB#584193]