Danny the Pirate's picture

Assidian

Observed: 14th October 2011 By: Danny the Pirate
SAM_0751
Description:
Identifications
Species interactions

No interactions present.

Comments

mbf45's picture

Invertebrate group

Can you edit the details for this observation so that it shows in the invertebrate group. I think that it is an Ascidian and that it could be Botryllus schlosseri.

Danny the Pirate's picture

Assidians are in the Phylem

Assidians are in the Phylem Chordata = Subphylem Urochordata so should they be invertebrates?

mbf45's picture

Yes they are still

Yes they are still invertebrates but I appreciate why you are asking. The Phylum Chordata is structured as follows:

Phylum Chordata
Subphylum Urochordata (Tunicates)
Subphylum Cephalochordata (Lancets)
Subphylum Vertebrata (the vertebrates)

All of the chordates share certain characteristics but only the vertebrata have a backbone.