Sturnira That Occur

Velazco, Paúl M. & Patterson, Bruce D., 2019, Small Mammals Of The Mayo River Basin In Northern Peru, With The Description Of A New Species Of Sturnira (Chiroptera: Phyllostomidae), Bulletin of the American Museum of Natural History 2019 (429), pp. 1-69 : 41

Key to the Species of Sturnira That Occur in Sympatry with S. giannae

(modified from Gardner, 2008e)

1. Lingual cuspids (metaconid and entoconid) of m1 and m2 poorly defined, usually forming a continuous sloping ridge.......................2

1′. Lingual cuspids (metaconid and entoconid) of m1 and m2 well defined and separated by a notch...................................................4

2. Forearm longer than 51 mm; greatest length of skull more than 27 mm …. Sturnira magna

2′. Forearm shorter than 50 mm; greatest length of skull less than 27 mm ….................3

3. Forearm 41–44 mm; upper inner incisor bicuspidate; lower incisors tricuspidate........................................ Sturnira sorianoi

3′. Forearm 42–47 mm; upper inner incisor; lower incisors bicuspidate ............................... ................................. Sturnira oporaphilum

4. Forearm 43–51 mm; greatest length of skull 22–26 mm; tips of inner upper incisors broad and weakly bicuspidate; metaconid and entoconid of m1 and m2 separated by a shallow notch; dorsal fur 4-colored .............. ............................................. Sturnira tildae

4′. Forearm 41–48 mm; greatest length of skull 21–25 mm; tips of inner upper incisors slen- der and weakly bicuspidate; metaconid and entoconid of m1 and m2 separated by a deep notch; dorsal fur bicolored.. Sturnira giannae