DistributionRead full entry
This species occurs in northwestern Peru, where it is known only from the lowland valley formed between the Cordillera del Condor and the Cerros de Campanquis, and from southern Ecuador, near Panguintza, at approximately 800 m asl (Twomey and Brown 2008; E. Twomey pers. comm. August 2011). The type series collected in 1929 and the majority of the specimens found in 2006 come from the same area, the south bank of the Río Marañón at the mouth of the Río Santiago in Amazonian Peru (Twomey and Brown 2008). Only a single individual was found in the north bank of the Marañón east of Río Santiago (Twomey and Brown 2008). This species is believed to be restricted to that region where it occurs from approximately 177 to 400 m asl, but it also could possibly occur at higher elevations in the Cordillera del Condor as a population of this species was reported from that area (20 km northeast of Santa Rosa) by Mark Pepper in 2007 (Twomey and Brown 2008). Further survey efforts in suitable neighbouring areas like the north side of the Marañón along both east and west banks of the Santiago, the Cerros de Campanquis and the west bank of the Santiago 8 km from its junction with the Marañón were unsuccessful in finding this species (Twomey and Brown 2008). In addition, another survey in the Cerros de Campanquis carried out by the Field Museum around September 2011 did not find this species (E. Twomey pers. comm. March 2013). Its range, taken as a proxy for extent of occurrence (EOO), is estimated to be approximately 7,352 km²; however, this species is presumed to occur more widely across the Río Santiago valley and it could occur over an area of up to 14,000 km² (E. Twomey pers. comm. August 2011).