Males have a forearm length of, while females have a forearm length of. Additionally, males weigh, while females weigh. It has a dental formula of for a total of 32teeth.
S. koopmanhilli has been documented in Ecuador and Colombia. It has been documented at a range of altitudes, from above sea level. The extent of its geographic range is also poorly understood, as are any threats that it may be facing. As of 2016, it was evaluated as a data deficient species by the IUCN because basic details of its biology and ecology are not yet known. It is possibly impacted by the deforestation of the Tumbes-Chocó-Magdalena region.