Complex sentence: Relationships of "Calydiscoides" Young, 1969 with "Protolamellodiscus" Oliver, 1969 are not clear; the two genera were described almost simultaneously, and it might be that they are synonym.
Split into simpler sentences: Relationships of "Calydiscoides" Young, 1969 with "Protolamellodiscus" Oliver, 1969 are not clear. The two genera were described almost simultaneously, and it might be that they are synonym.