. Ecuadorian lizards of the genus Stenocercus (Squamata: Tropiduridae) . Table 14. Distribution of Stenocercus within life zones in Ecuador. Life Zone Number of Species Thorny Premontane Thicket Tropical Dry Forest Tropical Very Dry Forest Premontane Thorny Forest Humid Premontane Forest Very Humid Premontane Forest Pluvial Premontane Forest Low Thorny Montane Steppe Montane Steppe Low Dry Montane Forest Low Humid Montane Forest Low Very Humid Montane Forest Humid Montane Forest Very Humid Montane Forest Sub-Andean Montane Forest Nevertheless, additional collecting is necessary to obtain a cle
. Ecuadorian lizards of the genus Stenocercus (Squamata: Tropiduridae) . Table 14. Distribution of Stenocercus within life zones in Ecuador. Life Zone Number of Species Thorny Premontane Thicket Tropical Dry Forest Tropical Very Dry Forest Premontane Thorny Forest Humid Premontane Forest Very Humid Premontane Forest Pluvial Premontane Forest Low Thorny Montane Steppe Montane Steppe Low Dry Montane Forest Low Humid Montane Forest Low Very Humid Montane Forest Humid Montane Forest Very Humid Montane Forest Sub-Andean Montane Forest Nevertheless, additional collecting is necessary to obtain a clearer understanding of the distributional patterns of the species of Stenocercus. Ecological Distribution The ecological distribution of the Ecuadorian Stenocercus species is described in the species accounts. For analytical purposes, I used the classification of life zones of Ecuador proposed by Cafiadas-Cruz (1983), which is based on the Holdridge (1947) system. The distribution of Stenocercus in Ecuador includes 15 life zones (Table 14). Most species inhabit premontane and montane forests. Dry life zones (annual mean precipitation 1000 mm). Only three species (S. chota, festae, and simonsii) are re- stricted to dry life zones. In contrast, five species (S. aculeatus, carrioni, haenschi, limitaris, and varius) are re- stricted to humid life zones. Within its distribution, Stenocercus iridescens inhabits the driest life zone (Tropical Desertic Thicket), whereas S. aculeatus inhabits the most humid zone (Pluvial Premontane Forest). Key TO SPECIES of Stenocercus of Ecuador 1. Scales on posterior surface of thigh imbricate 2 Scales on posterior surface of thigh granular 10 2. One row of enlarged supraoculars, each more than twice size of scales in adjacent rows 3 Row of enlarged supraoculars absent 5 3. Postfemoral pocket Type 4 or 5 S. limitaris Postfemoral pocket of other types 4 4. Postfemoral pocket Type 3; projecting angulate temporals S. acideatus Postfemoral pocket Type 1;
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