Eric Walker added a number of topics and Arachnid - Wikipedia to Arachnida, and added Arachnida to Chelicerata
Eric Walker added Diplocentrus melici and World’s Oldest Scorpions May Have Moved From Sea to Land 437 Million Years Ago | Science | Smithsonian Magazine to Scorpions, and added Scorpions to Arachnida
Eric Walker added Healing compounds in scorpion venom | Stanford News to Diplocentrus melici, and added Diplocentrus melici to Scorpions