Answers

2014-07-16T07:07:58+05:30
Hie,
Protochordata are also known as Acraniates.
this sub group has 2 sub-phyllum
which are: 1. urochordata, It's examples are ASCIDIA, SALPA, DOLIOLUM, PYROSOMA,HERDMANIA
 2: cephalochordata It's example is BRANCHIOSTOMA(AMPHIOXUS OR LANCELET)
HOPE IT HELPS AND IF IT DOES SO PLEASE MARK ME THE BEST.... 
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  • Brainly User
2014-07-16T09:06:28+05:30
Subphylum urochordata and cephalochordata are often referred as protochordates
examples are: ascidia,salpa,doliolum,herdmania
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