A. gladius, [595]

Acestrorhamphus, [575]

Acestrorhynchus, [575]

Achilognathus, [582]

Achiropsis, [687]

Achirus, [687]

Acipenser, [492], [149], [262], [264], [273], [274], [276], [282], [348];

ribs, [201];

lymph follicles, [261];

spiral valve, [268];