No tetrasporangial phase is known. (Dixon  and Irvine 1977 p. 148) However tetraspores released from Rhododiscus pulcherrimus when cultured germinated to form spermitangial and carpogonial branches.
This passage states that no tetrasporangium phase has been observed for *Rhododiscus pulcherrimus*, yet the study shows that tetraspores from this species can develop into spermatangial and carpogonial branches when cultivated.