Anelassorhynchus inansensis (Ikeda, 1904) (additional source)
Anelassorhynchus sabinus (Lanchester, 1905) (additional source)
Arhynchite Satô, 1937 (additional source)
Arhynchite rugosus Chen & Yeh, 1958 (additional source)
Echiurinae Quatrefages, 1847 represented as Echiuridae Quatrefages, 1847 (additional source)
Echiurus Guérin-Méneville, 1831 (additional source)
Listriolobus Fischer, 1926 [not Spengel, 1912] (additional source)
Listriolobus brevirostris Chen & Yeh, 1958 (additional source)
Ochetostoma Rüppell & Leuckart, 1828 (additional source)
Ochetostoma erythrogrammon Rüppell & Leuckart, 1828 (additional source)
Ochetostoma formosulum (Lampert, 1883) (additional source)
Thalassema Pallas, 1774 (additional source)
Thalassema fuscum Ikeda, 1904 (additional source)
Thalassema mortenseni Fischer, 1923 (additional source)
Urechidae Monro, 1927 (additional source)
Urechis Seitz, 1907 (additional source)
Urechis unicinctus (Drasche, 1880) (additional source)