Extraordinary Local Diversity of Disk-winged Bats (Thyropteridae: Thyroptera) in Northeastern Peru, with the Description of a New Species and Comments on Roosting Behavior Author Velazco, Paúl M. Author Gregorin, Renato Author Voss, Robert S. Author Simmons, Nancy B. text American Museum Novitates 2014 2014-01-27 2014 3795 1 28 http://www.bioone.org/doi/abs/10.1206/3795.1 journal article 10.1206/3795.1 0003-0082 5365613 9EA6163C-7A05-4550-B222-8C5F37BDFB5D KEY TO THE SPECIES Of THYROPTERA 1. Disk at base of thumb clearly oval in outline (not round); ventral pelage bicolored or tricolored; both cusps of the second upper incisor perpendicularly arranged relative to the long axis of the toothrow…………….…………………………..………………..…………………2 1′. Disk at base of thumb nearly circular in outline; ventral pelage unicolored; both cusps on the second upper incisor obliquely arranged relative to the long axis of the tooth row..……………………………………………………………………………………………4 2. Forearm ≥ 35.0 mm; GLS ≥ 14.0 mm; ventral pelage bicolored; proximal portion of forearm sparsely haired; rostrum of equal length or longer than the braincase; accessory cusps on the third lower incisor absent or only faintly developed….……………………………….3 2′. Forearm ≤ 34.5 mm ; GLS ≤ 13.5 mm ; ventral pelage tricolored; proximal portion of the forearm densely haired; rostrum considerably shorter than the braincase; accessory cusps well developed on the third lower incisor…….…..…….…………….. Thyroptera wynneae 3. Ventral pelage distinctly frosted, individual hairs dark brown to blackish at the base with grayish-brown to whitish tips; calcar lacks lappets or only one faintly developed lappet is present; GLS ≤ 15.1 mm and ZB ≤ 7.7 mm ……………..……………….. Thyroptera devivoi 3′. Ventral pelage bicolored, not distinctly frosted; calcar has one well-developed lappet that project posterolaterally from the shaft of the calcar; GLS ≥ 15.2 mm and ZB ≥ 8.0 mm… ……………….……………………………………………………………….. Thyroptera lavali 4. Ventral pelage unicolored white or pale gray; proximal portion of forearm sparsely haired; large foramen ovale ( 0.50–0.65 mm )…………………….……………… Thyroptera tricolor 4′. Ventral pelage unicolored yellowish-brown (not white); proximal portion of forearm densely haired; small foramen ovale (< 0.45 mm )……………………..……… Thyroptera discifera