nomen nudum [details]
A nomen nudum according to Kováčik & Komárek, 1976. [details]
Misspelling of Astericium Corda, 1839; latter is a synonym of Tetraedron, refer Kováčik & Komárek,1976. [details]
The original type species of Tetraedron, T. regulare Kützing, appears to be a xanthophyte and was transferred by ... [details]