An important diagnostic feature is the lack of a free posterior flagellum.

Another diagnostic feature is the neocortex of the brain, which no other vertebrate has.

It was named in reference to Achilles' heel, because diagnostic features are found there for these animals.

A suite of network management applications is also available, with diagnostic and maintenance features.

While most of the skeleton was lost, there were still enough diagnostic features to identify the bird.

The species has 75 to 80 lateral line scales and a total of 38 to 40 vertebrae, also diagnostic features.

There are no other diagnostic features of this species that allow classification in any group.

They are one of the most diagnostic features of paleosols.

As with the bracts, the nature of the pappus is an important diagnostic feature.

The color is probably the most diagnostic feature of the fish, especially when alive or fresh from the water.