1. 
   Antiarchi
   The Antiarchi ("Opposite anus") were the 2nd most successful order of placoderms known, after the Arthrodira. The order`s name was coined by Edward Drinker Cope, who, when examining some fossils that he thought were armored tunicates related to Chelysoma, mistakenly thought that the eye-hole was th...
   Found op http://en.wikipedia.org/wiki/Antiarchi
   
   
2. 
   Antiarchi
   Antiarchs (the Antiarchi) were a type of (mosty) small placoderms that were abundant during mid- to late-Devonian. These armored fish ranged from 8-12 inches (20-30 cm) long. Instead of the pectoral fins that other fish have, these unusual tetrapods had segmented 'arms' that were covered by hard der...
   Found op http://www.enchantedlearning.com/subjects/dinosaurs/glossary/
   
   

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