Notochord , which is a characteristic feature of chordates , is present only in larval tail in
Herdmania
Salpa
Amphioxus
Both1 and 2
As we have learned
Sub - phylum Urochordata -
Adult body is enclosed within leathery test or tunic formed of tunicin. Notochord is present only in larval tail.
- wherein
Eg. Herdmania, Ascidia, Doliolum, Salpa.