Systematics of big-eyed bats, genus Chiroderma Peters, 1860 (Chiroptera: Phyllostomidae) Author Garbino, Guilherme S. T. Pós-graduação, Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270 - 901, Belo Horizonte, Minas Gerais, Brazil Author Lim, Burton K. Department of Natural History, Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario M 5 S 2 C 6, Canada Author Tavares, Valéria Da C. Laboratório de Mamíferos, Departamento de Sistemática e Ecologia, CCEN / DSE, Universidade Federal da Paraíba, Campus I, 58059 - 900 João Pessoa, Paraíba, Brazil text Zootaxa 2020 2020-09-07 4846 1 1 93 journal article 20998 10.11646/zootaxa.4846.1.1 2c8355fa-af80-4a52-be9a-a3c36a99bb19 1175-5326 4017497 6F6EBF63-5598-416C-8694-14C4A8687693 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