1. (small freshwater crustaceans with a shield-shaped carapace)
Notostraca, order Notostraca
synonim: przekopnice
synonim: nieboraki

2. (extinct group of bony-plated fishes with primitive jaws)
Placodermi, class Placodermi: : synonim: plakodermy
synonim: ryby pancerne