Fibulictidae

Family Fibulictidae are placed under the Kirigami, and are currently represented by a single species found in Hong Kong. Fibulictids are distinguished by long flexible outward-curving oral hooks, surrounding a large oral groove flanked with two thick blunt lateral dential processes, and a singular central stylet reminiscent of the Acutignathidae. In addition to unique hooking arms, Odontotrochidae also possess interlocking tubercles and small fenestra on its lateral sides, all incredible adaptations that allow it to buckle into a three-dimensional shape, raising the central tooth up like a thorn.