Complex sentence: Historically, it was considered closely related to the genus "Memnoniella", because the spores are produced in slimy heads rather than in dry chains, but nowadays the synonymy of the two genera is generally accepted.
Split into simpler sentences: Historically, it was considered closely related to the genus "Memnoniella", because the spores are produced in slimy heads rather than in dry chains. Recently, the synonymy of the two genera is generally accepted.