PROCEEDINGS OF THE CALIFORNIA ACADEMY OF SCIENCES Volume 5 1 , No. 1 2, pp. 449-460, 5 figs., 3 tables. / November 23, 1999 WOI/ 2 9 1999 i Four New Species of the Genus Platymantis (Amphibia: Ranidae) from Luzon Island, Philippines by Walter C. Brown Department ofHerpetologw California Academy of Sciences San Francisco. California 941 IH Angel C. Alcala SUAKCREM. SiUiman University: Diimaguete City, 6200 Philippines and Arvin C. Diesmos College of Arts and Sciences. Univosity of the Philippines, Los Banos, Lagiina. Philippines Four new species of Platymantis {P. cagayanensis, P. indeprensus, P. pseudodorsalis, and P. taylori) are described. Two are from Mt. Banahao, one from the Central Cordillera, and one from the Sierra Madre, Luzon Island, Philippines. These species are in the dorsalis Group as diagnosed at present. The distinguishing characters and distribution of the Philippine species of the dorsalis Group are discussed. Since 1994, our field work on Mt. Maquiling and Mt. Banahao (two mountain peaks in southern Luzon), the Central Cordillera, and Sierra Madre (northern Luzon, Philippines), has resulted in the recognition of 1 1 species o^ Platymantis, dorsalis Group as currently defined (Brown et al. 1997a). Seven of these have been described: P. corrugatiis, P. dorsalis, P. spelaeus, P. levigatiis, P. miinidus, P. naomii, and P. pygmaeus. These species are clearly distinguished by their advertisement calls, although they share a number of morphological features. These similarities, particularly of the digits, are the main reason for the failure of earlier herpetologists to recognize them as separate species. Materials and Methods Materials examined include: ( 1 ) holotypes of Platymantis: P. corritgatus, P. dorsalis, P. mimiiliis, P. levigatus, P. spelaens, P. naomii, and P. pygmaeus; (2) all specimens from recent collections on Mt. Banahao, Mt. Maquiling, Central Cordillera, and Sierra Madre that are referable to the dorsalis Group of species. These materials are in the custody of the following institutions: Museum National d'Histoire Naturelle (MNHN), the California Academy of Sciences (CAS or CAS-SU), Philippine National Museum (NMPH), SiUiman University Biology Museum (SUBM). Morphometric characters: snout-vent length (SVL), head length (HL), head breadth (HW), snout length (SnL), diameter of eye (ED), diameter of tympanum (TD), tibia length (TiL), and third finger length from proximal edge of basal tubercle (3FL) were measured to the nearest 0.1 mm, using a 449
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