Phylum Hemichordata#!#Phylum Chordata

Phylum chordata || Sub-Phylum Urochordata || Sub-Phylum Cephalochordata

Phylum Hemichordata || Characteristic Features OF all "Non-Chordate Phylums'

Phylum hemichordata || characters OF non chordates

Phylum Chordata-General Characters 2 || Sub phylum Urochordata & Cephalochordata

Phylum Hemichordata Introduction || General Characteristics OF Balanoglossus || Differences Between Nonchordates and Chordates

Discussion Class-3 Phylum Mollusca || Echinodermata || Hemichordata || Chordata || Cephalochordata || Pisces || Superclass

17. Kingdom Animalia - Phylum Echinodermata And Hemichordata

Hemichordata was carlier considered as a subphylum under phylum-Chordata. But now, it is placed as a separte phylum under

Assertion: Hemichordata was earlier considered as subphylum under phylum chordata. But now it is placed as a separate phylum under non-chordata. Reason: Hemichordates have open type of circulatory system and indirect development.