The two new species retained their federally threatened status, which they had received while members of S. glaucus.

Most species of mammals have retained nipples on the male, not just primates.

The single species in the family Amphibolidae is archaic and retains an operculum.

Most species must retain an intact central part of the body to be able to regenerate, but a few can regrow from a single ray.

The species still retains many forms of uncertain rank and validity, and is pending a detailed study.

Many species retain distasteful or poisonous chemicals acquired from their host plants.

Forams cannot get any smaller than their beginnings, but many species retain this initial size and continue to flourish.

This species retains much of its original shell, giving it a beautiful pearly lustre.

The species as a whole retains the federal status given to var.

Some species of snake are ovoviviparous and retain the eggs within their bodies until they are almost ready to hatch.