The pectoral fin disc of the onefin electric ray is wider than long and almost circular in shape.

The western shovelnose stingaree has a rounded pectoral fin disc slightly wider than long.

This species is plain sandy in color above and has a broad, rounded pectoral fin disc.

The pectoral fin disc of the common torpedo is almost circular in shape and about 1.3-1.4 times wider than long.

Members of this family have flattened pectoral fin discs that range from oval to diamond-like in shape.

It has a diamond-shaped, relatively thin pectoral fin disc approximately 1.1-1.2 times wider than long.

It has an oval pectoral fin disc with a long, flexible, broad-angled snout.

The pectoral fin disc of the shagreen ray is somewhat wider than it is long.

This species has an oval pectoral fin disc with tiny eyes and a rectangular curtain of skin between the nostrils.

Its pectoral fin disc is oval in shape and wider than long, with evenly rounded outer margins.