枝状に分岐

https://sites.google.com/site/kokemushiweb/gallery/phylactolaemata/branch/ushaped

触手冠は馬蹄形・浮遊性休芽をもつ

https://sites.google.com/site/kokemushiweb/gallery/phylactolaemata/branch/fredericellid

触手冠は円形・浮遊性休芽をもたない