embryos in gill-cavities of Unio, [416]

Rhodichthys, [712]

Rhodosoma, [73];

R. callense, [72]

Rhombatractus, [639]

Rhomboidichthys, [687]

Rhombosolea, [687]

Rhombus, [687], [264];

R. aculeatus, [262];

R. maximus, [264], [275]