Answer:
- Echinoderm: Asterias (Starfish)
- Cnidarian: Adamsia (Sea anemone)
- Mammal: Homo sapians (Human)
- Arthropod: Periplaneta americana (Cockroach)
Note:-
As I typed the scientific names, I italicized them to represent their Latin origin. If handwritten, they should be underlined according to rules of ICBN and ICZN.