Similar to 鉤頭動物

Acoelomorpha

Ctenophora

Protostome

Tetraneuralia

Lophotrochozoa

Kimberella

Lophophorata

Ecdysozoa

Gnathifera (Spiralia)

Hyolitha

Platyzoa

Lobopodia

Trochophore

Mygalomorphae

29th century BC

28th century BC

27th century BC

26th century BC

25th century BC

24th century BC

23rd century BC

22nd century BC

20th century BC

19th century BC

18th century BC

17th century BC

16th century BC

15th century BC