Russian Journal of Herpetology Vol. 8, No. 3,2001, pp. 165 - 170 THE AGAMID LIZARD Ptyctolaemus phuwtilmensis MANTHEY AND NABHITABHATA, 1991 FROM THAILAND AND LAOS REPRESENTS A NEW GENUS Natalia B. Ananjeva’ and Bryan L. Stuart24 SubmittedMarch 12,200l New material of Ptyctohaemus phuwuanensis is described. This rock-dwelling agarnid from Thailand and Laos differs from all other draconines including Ptyctolaemus gularis (the type species of the genus) by having femoral pores, and from all other agamids by having the combination of femoral pores and haired skin sense organs. The taxon is described here as a new genus. Key Words: Agamidae, Draconinae, Ptyctolaemus, Thailand, Laos, femoral pores, newgenus, INTRODUCTION In 199 1, an unusual new species of agamid lizard from northeasternThailand was describedasPtycto- laemusphuwuanensis (seeManthey and Nabhitabha- ta, 1991). The new taxon was assigned to the other- wise monotypic genus Ptyctolaemus Peters, 1864be- cause it shared the character of three parallel folds on each side of the throat with P. gularis, the type spe- cies of the genus known from Assam and Tibet. However, Manthey andNabhitabhata (1991) realized that their placement of P. phuwuanensis into the ge- nus Ptyctolaemus was preliminary, owing to a num- ber of significant morphological differences between it andP. gularis. In a phylogenetic study of the Agamidae using data on mitochondrial DNA, Honda et al. (2000a) po- sitioned P. phuwuanensis asthe sistergroup to Draco and within the monophyletic group V (after Moody, 1980), which corresponds to the subfamily Draconi- nae (sensuMacey et al., 2000). In a more detailed phylogenetic study of the Draconinaealso using data on mitochondrial DNA, Honda et al. (2000b) posi- ’ Department of Herpetology, Zoological Institute, Russian Acad- emy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia. E-mail: agama@NA4755.spb.edu; Fax +7 (812) 114-04-44. * Wildlife Conservation Society, P.O. Box 6712, Vientiane, Lao PDR (Laos). 3 Department of Zoology, P.O. Box 7617, North Carolina State University, Raleigh, NC 27695, USA. 4 Present address: Field Museum, Department of Zoology, Divi- sion of Amphibians & Reptiles, 1400 S. Lake Shore Drive, Chi- cago, IL 606052496, USA. E-mail: bstuart@fieldmuseum.org. tioned P. phuwuanensis again within the draconine clade, but as the sister group to all other draconine genera included in the analysis. We concluded from these studies that P. phuwuanensis is a group V (Moody, 1980), draconine (sensu Macey et al., 2000) agamid, but that it probably represents a unique lin- eage within the subfamily. Data on mitochondrial DNA of the rare P. gularis were not included in these studies, and so its relationship to P. phuwuanensis was not determined. In this study we examined specimens of both spe- cies of Ptyctolaemus, including new material of P. phuwuanensis from Laos, and found significant morphological differences betweenP. phuwuanensis and P. gularis (Figs. 1 - 2). The presence of femoral pores distinguishedP. phuwuanensisfrom all other draconines, and the combination of having femoral pores and haired skin sense organs distinguished P. phuwuanensis from all other agamid lizards. Pty- ctolaemusphuwuanensis is allocated here to a new genus. MATERIAL AND METHODS In June 1998, Ptyctolaemus phuwuanensis was observed by one of us (BLS) in the field in Laos. Specimens were collected by hand at night and shortly preserved in 10% buffered formalin. These were deposited at Field Museum, Chicago (FMNH 255493 - 95) in August 1998, and were transferred to 70% ethanol upon arrival there. We alsoexaminedmaterial, including type speci- mens,of P. phuwuanensis and P. gularis in the hold- 10262296/2001/0803-0165 0 2001 Folium F’ublishing Company