Karyotypes of a cryptic diploid form of the unisexual leposoma percarinatum (Squamata, Gymnophthalmidae) and the bisexual leposoma ferreirai from the lower Rio Negro, Amazonian Brazil - Laguna, Marcia Maria; Rodrigues, Miguel Trefaut; Santos, Rodrigo Marques Lima dos; Yonenaga-Yassuda, Yatiyo; Ávila-Pires, Teresa; Hoogmoed, Marinus S.; Pellegrino, Kátia Cristina Machado (Journal of Herpetology, 2010)