Phylum Acanthocephala Kohlreuther, 1771 - acanthocephalans see [unranked] Acanthocephala Kohlreuther, 1771 Class Palaeacanthocephala (Meyer, 1931) Order Echinorhynchida Southwell & Macfie, 1925 1 Family Rhadinorhynchidae Travassos, 1923