Pseudobranchiomma schizogenica Tovar-Hernández and Dean, 2014 and Hydroides brachyacantha Rioja, 1941a. Pseudobranchiomma schizogenica: A) radiolar crown and thorax, A₁) paired radiolar eyes, A₂) radiolar flanges, B) interramal eyes, C) radiole with flanges. Hydroides brachyacantha: D–H) opercula, different angle views. Scale bars: A–B) 3 mm, C, F–H) 0.3 mm, D–E) 0.5 mm.