Wikipedia
Lonchothrix
Lonchothrix emiliae is a spiny rat species from South America. It is known from Brazil south of the Amazon River, where it has been found in grassland and gallery forest. Also known as the Tuft-tailed Spiny Tree Rat, it is the only species in the genus Lonchothrix. Very little is known about this animal. It is small with an average adult weight of about 138 grams. It is nocturnal and solitary in habits. Described by Thomas in 1920, presumably the name indicates that it has a tufted tail and spiky fur but no photos are available to confirm this.