LA SELVA-BRAULIO CARRILLO MAMMALS 



31 



Family Mormoopidae 



Pteronotus davyi 

 Davy's Naked-backed Bat 



Davy's naked-backed bats are found from central Sonora and southern Tamau- 

 lipas, Mexico, through Central America to northern South America (Fig. 18). The 

 distribution of Pteronotus da\yi in southern Central America and northern South 

 America is poorly understood; this species is represented from Costa Rica, Vene- 

 zuela, and eastern Peru by only a few specimens. There are apparently no records 

 of Davy's naked-backed bat from Panama, Colombia, or Ecuador. In a recent revi- 

 sion of the family. Smith (1979) recognized three subspecies of P. davyi, and con- 

 sidered the nominate race P. d. davyi to be the subspecies found in Costa Rica. 

 The biology and distribution of this species recently was reviewed by Adams (1989). 



Starred: and Casebeer (1968) reported the first specimens of Davy's naked- 

 backed bats from Costa Rica. They obtained a total of four specimens from three 

 localities in northwestern Costa Rica; one of the localities was in Alajuela Prov- 

 ince and two were in Guanacaste Province. On the basis of this report, Wilson 

 (1983) listed the species as present at Palo Verde. There have been no other reports 

 of this diminutive naked-backed bat from the country. 



On 28 July 1983, J. Wenzel captured a single adult female in a mist net set 

 in the arboretum clearing at La Selva. This is the first record of this species from 

 the Caribbean lowlands of Costa Rica. 



Specimen examined (1)— Finca La Selva, 3 km S of Puerto Viejo, 70 m 

 [1 female, KU]. 



Fig. 18. Davy's naked- 

 backed bat, Pteronotus 

 davyi. Photo by R. K. 

 LaVal. 



