>^ B R E V I OR, A Museiim of Comparative Zoology us ISSN 0006-9698 Cambridge, Mass. 1 8 April 1996 U N 1 V Number 506 A PHENACOSAUR FROM CHIMANTA TEPUI, VENEZUELA Ernest E. Williams,' Maria Jose Praderio,^ AND Stefan Gorzula^ Abstract. A new species of the genus Phenacosaurus is described from Chi-manta Tepui, close to P. neblininus. It differs from P. neblininus (and other known phenacosaurs) in having the interparietal smaller than the ear and in having the circumnasal in broad contact with the rostral and only barely touching or not all in contact with the first supralabial. It also differs from neblininus in a generally darker coloration and having the belly with bold dark reticulation. INTRODUCTION Until Lazell (1969) described the new species Phenacosaurus orcesi from two localities in Ecuador, the anoline lizards separated as the genus Phenacosaurus had been known only from Colombia and from just over the border in Venezuela. A summary of new information has been reported in Williams et al. (1996). Now still another small but distinctive new species, represented by a unique specimen, deposited in the collections of the Sociedad de Ciencias Naturales "La Salle," Caracas, most similar to the other tepui species, P. neblininus, from Cerro de La Neblina, provides the easternmost representative of the genus from Chi-manta Tepui in Venezuela. The new species is named after the late Carlos Todd, long active in conservation work (Gorzula, 1987), who participated in the exploration of Chimanta Tepui that resulted in the discovery of the new species Phenacosaurus carlostoddi. ' Museum of Comparative Zoology, Harvard University, Cambridge, Massachu-setts 02138. ^ Herpetologia, Direccion Ciencias Naturales, Fundacion Museo de Ciencias, Apartado 5883, Caracas 10 10-A, Venezuela. ' Biosphere Consultants, 614 West Main Street, Newbem, Tennessee 38059.