It has also been placed in its own family, Anemarrhenaceae.

As such it is now placed in its own family, Pluvianellidae.

The species has no close relatives, and is placed in its own family, Crymostygidae.

That's why in earlier classifications it was placed in its own family.

This fish has also been placed in its own family, Calophysidae.

Based on that unique feature the two are placed in their own family, the Najaceratidae.

Halophytum has sometimes been placed in its own family, Halophytaceae.

The nothrotheres have recently been placed in their own family, Nothrotheriidae.

The genus has been placed in its own family, Lumkuiidae.

It is now placed in its own family.