Sturnira perla

It was described as a new species in 2011 by Jarrín and Kunz. The holotype had been collected in Bosque Protector La Perla in 1990. Its species name "perla" was chosen both to refer to something "very precious" as well as the globular shape of its skull. Additionally, the species name honors Bosque Protector La Perla, which is where the majority of the specimens used in the original description were found.[2]

Its forearm length is 42.7–43.5 mm (1.68–1.71 in). It is regarded as a cryptic species, as it is similar in appearance to the little, Louis's, and Tilda's yellow-shouldered bats. Its dental formula is 2.1.2.32.1.2.3 for a total of 32 teeth.[2]

It is endemic to Ecuador. It is found in lowland habitats of 35–200 m (115–656 ft) above sea level.[1]

As of 2016, it is assessed as data deficient by the IUCN. It met the criteria for this classification because it is poorly known, as a recently described species. Furthermore, it could be severely impacted by deforestation, or conversely, its range could be larger than currently projected. More surveys are recommended to establish its range and ecological requirements.[1]