5 Main Representative Types of Hemichordata (With Diagram) | Zoology

The following points highlight the five main representative types of hemichordata. The types are: 1. Saccoglossus (=Dolichoglossus) 2. Ptychodera 3. Cephalodiscus 4. Atubaria 5. Rhabdopleura. Type # 1. Saccoglossus (=Dolichoglossus): Saccoglossus (Fig. 3.1) is a typical enteropneust very much similar to Balanoglossus in habits, habitat and structure. It is a marine, slender soft- bodied tongue worm living in spirally twisted [...]