. Ecuadorian lizards of the genus Stenocercus (Squamata: Tropiduridae) . 77 1" 2- e^ )3 ⢠S. guentheri â S. haenschi A S. humeralls 77 Fig. 11. Distribution of three species of Stenocercus in Ecuador. ages in the following Provincias: Chimborazo, Cotopaxi, Imbabura, Pichincha, and Tungurahua. The distribution lies within the Low Humid Montane Forest, Low Dry Montane Forest, Low Thorny Montane Steppe, and Mon- tane Steppe life zones. The mean annual temperature is 12-18 °C in the former three life zones and 7-12°C in the fourth. The mean annual precipitation is 1000-2000 mm in Low Humid
. Ecuadorian lizards of the genus Stenocercus (Squamata: Tropiduridae) . 77 1" 2- e^ )3 ⢠S. guentheri â S. haenschi A S. humeralls 77 Fig. 11. Distribution of three species of Stenocercus in Ecuador. ages in the following Provincias: Chimborazo, Cotopaxi, Imbabura, Pichincha, and Tungurahua. The distribution lies within the Low Humid Montane Forest, Low Dry Montane Forest, Low Thorny Montane Steppe, and Mon- tane Steppe life zones. The mean annual temperature is 12-18 °C in the former three life zones and 7-12°C in the fourth. The mean annual precipitation is 1000-2000 mm in Low Humid Montane Forest, 500-1000 mm in Low Dry Montane Forest, and 250-500 mm in the latter two zones. Fritts (1974) gave Sevilla de Oro (02°48' S, 7839' W, 2630 m; Provincia Azuay) as the southernmost locality for Stenocercus guentheri. However, I examined two of the specimens from Sevilla de Oro that Fritts (1974) checked (JAP 6522, 6525, 6527, 6528, 6530, USNM 201222, 201223) and they correspond to Furthermore, the neotype of S. festae was collected in Sevilla de Oro. Stenocercus guentheri also has been reported from the Andes of southern Colombia (Ayala and Castro, 1982; Castro and Granados, 1993; Corredor, 1983), where it oc- curs at elevations of 2000-3900 m in departamentos of Narifio and Cauca (Castro and Granados, 1993). Males tend to occupy rocks and other elevated posi- tions for basking and feeding, whereas females prefer the ground (Fritts, 1974). At localities lacking exposed rocks or rock walls, both sexes seek refuge in holes in the ground at the bases of plants such as Agave and Stipa (Fritts, 1974). De Vries et al. (1983) reported S. guentheri as one of the main prey items of the Andean falcon Phalcoboenus carunculatus (Carunculated Caracara). Remarks.âFritts (1974) described some of the consid- erable geographic variation in Stenocercus guentheri. He noted that the number of scales around midbody is higher in some populations in the Cotopaxi and
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