63 Pterobranchia — Cephalochordata 



Class Subcl Order 



E N T E R P N E U S T A ^^^ 



ENTEROPNEUSTA rec 



Balanoglossida rec 



PLANCTOSPHAEROIDEA 



PLANCTOSPHAEROIDEA rec 



Planctosphaeroidea rec 



T U N I C A T A ^^* 



LARVACEA (Copelata, Appendicularia, Atremata, Perennichor- rec 

 data) 



Larvacea rec 



ASCmiACEK^^^ {Tethyodeae) rec 



Stolidobranchiata (Ptychobranchia) REC 



Aspiraculata REC 



Phlebobranchiata (Diktyobranchia, Dictyobranchia) rec 



Aplousobranchiata (Krikobranchia) rec 



Octacnemida rec 



THALIACEA rec 



Pyrosomata Rec 



Pyrosomatida (Luciae, Lucida) rec 



Myosomata rec 



Cyclomyaria (Doliolida) rec 



Hemimyaria (Salpida) rec 



Desmomyaria rec 



CEPHALOCHORDATA ^*« 



LEPTOCARDIA rec 



Amphioxi (Branchiostomoidea) rec 



^^^ Includes: Pelagothurida. "^ Synonyms: Helminthomorpha. 



^^* Synonyms: Urochordata. Suhphyla: Copelata = larvacea; Acopa (Caduci- 

 chordata) = ascidiacea + thaliacea. 



^^^ Includes: Enterogona, Pleurogona. 



^^^ Synonyms: Cirrhostomi, Entomocrania, Haplocyemata, Homomeria, Mye- 

 lozoa, Pharyngobranchii, Acrania. 



