Dimorusian

The Dimorusians are sapient, bipedal rodentlike creatures native to Dimorus IV. They stood about .7 meters tall, weighed about 32 kilograms, and lived roughly 14 years. Their backs were lined with quills similar to those of the Terran porcupine. Unlike the porcupine, Dimorusian quills were highly toxic.

History
Dimorus IV was once used by botanists as a research facility. This did not last due to the xenophobic nature of the Dimorusians, who killed several scientists with their quills. Despite the eventual development of an antidote, the planet was quarantined to avoid hostilities.