3 Important Members of Phylum Annelida
List of three important members of Phylum Annelida:-1. Polychaetes 2. Oligochaetes 3. Hirudinea. Member # 1. Polychaetes: This group includes heterogeneous forms where variation is marked not only in size but also in habits and structural organisation. Following examples will illustrate the range of diversities: Arenicola: Burrows in sand; body is distinctly divisible into three regions—anterior region (or pre-branchial region) [...]