2004 
70 68 66 64 




VOSS ET AL.: BOLIVIAN MARMOSOPS 17 
62 60 58 
Marmosops | 10 
& bishopi 
@ creightoni 42 

. 
—~ 
< 

Fig. 10. Collection localities of Marmosops bishopi and M. creightoni in Bolivia. Numbers are keyed 
to gazetteer entries in appendix 2. 
have a pale scrotum with white fur and un- 
pigmented skin (versus scrotum dark with 
brown fur and mottled-grayish skin). 
Marmosops impavidus, another Bolivian 
species, overlaps with M. creightoni in many 
measurements, although it averages smaller 
in most dimensions. However, M. impavidus 
has dull grayish- or reddish-brown (versus 
rich chocolate-brown) dorsal fur; pale-furred 
metapodials that do not contrast in color with 
the digits (versus dark-furred metapodials 
contrasting with whitish digits); a much nar- 
rower interorbital region (LIB = 5.6—6.3 ver- 
sus 6.6—7.2 mm); and much smaller bullae. 
In addition, adult males of M. impavidus ap- 
pear to have no trace of a gular gland (versus 
gular gland weakly developed), and they 
have a pale scrotum with white fur and un- 
pigmented skin (versus scrotum dark with 
brownish fur and mottled-grayish skin). 
