Characteristics of Class Dipnoi are given below:

1) Palato quadrate strongly fused with the skull.

2) Gill slits one pair only.

3) Skin covered by cycloid scales.

ADVERTISEMENTS:

4) Internal nares present.

5) Uperculum and cloaca present.

6) paired fines are lobed.

7) Pelvic gardel unpaired.

ADVERTISEMENTS:

Example:

1) Protopterus.

2) Lepidoseren.

3) Neoceratodus.