Diversity, natural history, and geographic distribution of snakes in the Caatinga, Northeastern Brazil Author Guedes, Thaís B. Author Nogueira, Cristiano Author Marques, Otavio A. V. text Zootaxa 2014 3863 1 1 93 journal article 10.11646/zootaxa.3863.1.1 994b97ae-8a03-4726-86f7-ce51e39578a4 1175-5326 287111 A683CABE-4305-47A4-A063-03FDF93182C0 Sibynomorphus mikanii (Schlegel, 1837) “Dormideira” (Figs. 18.6 and 31.2) It was recorded in the states of Ceará, Bahia, and Minas Gerais. Except for two records in contact areas, all other records are above 560 m elevation. It is also widely distributed in the Atlantic Forest, Cerrado, and Pantanal regions ( Marques et al. 2001 , 2005 ; Nogueira et al. 2010 ). Inside Caatinga, it inhabits open areas either in transitional, next to Atlantic Forest, and on highland areas. It has terrestrial habits, is nocturnal, and feeds on mollusks ( Marques et al . 2001 ).