Xressian

Xressians are a sapient, hostile species from the planet Xress, in the Alpha Centauri System.

Biology
Xressians are small creatures, about as tall as a Human's knees. Their heads resemble a naked rat's, and their members are thread-like and equipped with claws. Their language consists of clicks and guttural sounds.

Culture and society
As of the year 2023, Xressians have developed the means of interplanetary travel, but not interstellar travel.

Appearances

 * Rayons pour Sidar, by Stefan Wul (1957)