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The ecology of four phyllodactylid geckos, three of them only recently discovered, viz. Phyllopezus maranjonensis, Phyllodactylus delsolari, Phyllodactylus thompsoni and Phyllodactylus reissii, was studied in a northern interandean basin of Peru. P. maranjonensis and P. delsolari were almost always encountered together and were exclusively found on rock faces; P. thompsoni was found in various microhabitats and coexisted with all three other species; P. reissii was rarely found and only in one locality on the walls of an abandoned house, coexisting solely with P. thompsoni. All species fed on arthropods with isopods, coleopterans and insect larvae dominating their diet, numerically. Stones and eggshells could be found in the stomachs of gravid P. maranjonensis females. Dietary niche breadth values for all species are well above 1 and similar. Dietary niche overlap among all species is low, except for P. delsolari and P. reissii, which might be associated with the low abundance of P. reissii in this area. Niche overlap among P. maranjonensis and P. delsolari was low and probably makes their coexistence possible, despite their remarkable size. [ABSTRACT FROM AUTHOR]

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We describe two new species of Ameiva Meyer, 1795 from the dry forest of the Northern Peruvian Andes. The new species Ameiva nodam sp. nov. and Ameiva aggerecusans sp. nov. share a divided frontal plate and are differentiated from each other and from their congeners based on genetic (12S and 16S rRNA genes) and morphological characteristics. A. nodam sp. nov. has dilated postbrachials, a maximum known snout-vent length of 101 mm, 10 longitudinal rows of ventral plates, 86-113 midbody granules, 25-35 lamellae under the fourth toe, and a color pattern with 5 longitudinal yellow stripes on the dorsum. Ameiva aggerecusans sp. nov. has not or only hardly dilated postbrachials, a maximum known snout-vent length of 99.3 mm, 10-12 longitudinal rows of ventral plates, 73-92 midbody granules, 31-39 lamellae under the fourth toe, and the females and juveniles of the species normally exhibit a cream-colored vertebral stripe on a dark dorsum ground color. We provide information on the intraspecific variation and distribution of A. concolor. Furthermore, we provide information on the environmental niches of the taxa and test for niche conservatism.