[1] Their various species are found all the way from the eastern end of the Iberian peninsula to southern Japan.

[2] These small, 30-cm-long (1-ft-long) creatures probably lived in large freshwater lakes, like present day beavers.

A semiaquatic lifestyle is indicated by the presence of combing-claws, which living beavers use to waterproof their fur.

Steneofibers were more terrestrial than modern beavers, living in burrows, but fossils are still found near ancient water sources.

The finding of a possible family group of Steneofiber skeletons in France has been used to infer that the genus employed a K-selected reproductive strategy like modern beavers, in which extensive parental care is given to a small number of offspring.