Chiroderma, Garbino & Lim & Tavares, 2020

Garbino, Guilherme S. T., Lim, Burton K. & Tavares, Valéria Da C., 2020, Systematics of big-eyed bats, genus Chiroderma Peters, 1860 (Chiroptera: Phyllostomidae), Zootaxa 4846 (1), pp. 1-93 : 58

Key to the species and subspecies of genus Chiroderma

1 Size small, forearm equal to or less than 42 mm, greatest length of skull equal to or less than 23 mm ................... 2

- Size intermediate to large, forearm equal to or more than 43 mm, greatest length of skull equal to or more than 23 mm ...... ................................................................................................... 3

2 First lower premolar longer than high mesiodistally; third cuspid of first lower premolar absent; crown of lower canine at the same level or higher than the tip of the coronoid process of the mandibular bone.................... Chiroderma gorgasi

- First lower premolar higher than long mesiodistally; third cuspid of first lower premolar present; crown of lower canine clearly below the level of the top of the coronoid process of the mandibular bone........................ Chiroderma trinitatum

3 Size large, length of forearm equal to or more than 56 mm, greatest length of skull equal to or more than 28 mm; first lower premolar in contact with the lower canine and second premolar............................... Chiroderma improvisum

- Size intermediate to large, forearm length equal to or less than 54 mm (43–54 mm), greatest length of skull usually equal to or less than 28 mm (23–28 mm); diastema between first lower premolar and second lower premolar...................... 4

4 Size large, forearm length 47–54 mm, greatest length of skull 26–29 mm; dorsal pelage brown or dark brown; basal and terminal bands of the dorsal hairs of a same color................................................................ 5

- Size intermediate, forearm length 43–50 mm, greatest length of skull 23–26 mm; dorsal pelage brown, light brown or buff; base of dorsal hairs darker than terminal band................................................................... 6

5 First lower premolar large, with approximately ⅔ the height of second lower premolar; crown of lower canine clearly below the level of the top of the coronoid process of the mandibular bone; paraoccipital processes present....................................................................................................... Chiroderma doriae doriae

- First lower premolar small, with approximately ¼ the height of second lower premolar; crown of lower canine approximately the same height as the top of the coronoid process of the mandibular bone; paraoccipital processes absent..................................................................................................... Chiroderma salvini

6 Tip of noseleaf unnotched; facial stripes bright and conspicuous; posterior process of the palate absent; first upper incisors with convergent tips....................................................................................... 7

- Tip of noseleaf notched; facial stripes dark and inconspicuous; posterior process of the palate present; first upper incisors with parallel or divergent tips................................................................................ 8

7 Length of forearm usually more than 48 mm (45–50 mm); greatest length of skull equal to or more than 25 mm (25–27 mm); high-crowned first lower premolar (⅔ the height of second lower premolar; low-crowned lower canine, with the tips clearly below the level of the top of the coronoid process of the mandibular bone.................... Chiroderma doriae vizottoi

- Length of forearm equal to or less than 47 mm (43–47 mm); greatest length of skull equal to or less than 25 mm (23–25 mm); low-crowned first lower premolar (¼ the height of second lower premolar); high-crowned lower canine, with the tips approximately the same height as the top of the coronoid process of the mandibular bone................ Chiroderma scopaeum

8 Length of forearm 46 mm on average (41–52 mm); distributed east of the Andes........... Chiroderma villosum villosum

- Length of forearm 44 mm on average (41–47 mm); distributed west of the Andes............. Chiroderma villosum jesupi