Basionym: Phlegmacium arquatum var. haasii M.M. Moser, Die Gattung Phlegmacium (Schleimköpfe). Die Pilze Mitteleuropas 4: 353 (1960) [MB#353707] Obligate synonyms: - Cortinarius calochrous var. haasii (M.M. Moser) Brandrud, Cortinarius: A48 (1989) [MB#128994] - Cortinarius calochrous var. haasii (M.M. Moser) Brandrud, Nordic Journal of Botany 10 (5): 536 (1990) [MB#128997] - Cortinarius haasii (M.M. Moser) M.M. Moser, Kleine Kryptogamenflora von Mitteleuropa - Die Blätter- und Baupilze (Agaricales und Gastromycetes) IIb/2: 294 (1967) [MB#329053] - Cortinarius arquatus f. haasii (M.M. Moser) Nespiak, Flora Polska Grzyby (Mycota) 7: 155 (1975) [MB#352719] - Cortinarius callochrous var. haasii (M.M. Moser) Brandrud (1989) [MB#534586] - Cortinarius callochrous var. haasii (M.M. Moser) Brandrud (1990) [MB#534587]