... There are, however, no traces of this early Sunda population (independent of whether Multiregional or Single Origin models are assumed, the Southeast Asian population immediately ancestral to Australians remains unknown), its existence being inferred on biogeographical grounds, shared dental similarities between Southeast Asians and Australians (T. Hanihara, 1992a;Turner, 19921, and linguistic affinities between Southeast Asian "Negritos" and Melanesian groups (speakers of Indo-Pacific, non-Austronesian, languages; Greenberg, 1971). There are several archaeological sites from 40 ka that indicate a widespread late Pleistocene occupation of the Sunda landmass [-37 ka at Long Rongrien, Thailand (Anderson, 1987),31 ka at Lean Burung 2 cave, Sulawesi (Glover, 1981), 31 ka at Kota Tampan in peninsular Malaysia (Zuraina and Tija, 19881, 28 ka at Ting Kayum, island Malaysia (Bellwood and Koon, 1988), 28 ka a t Pilanduk cave (Fox, 19781, c. 25 ka at Da-phuk, Vietnam, 25 ka at Sai-vok, Thailand, and 14 ka at Uai Bob0 2 cave, Timor (Glover, 1987;Glover and Presland, 1985), and 23-18 ka at the sites of Mai Da Ngubm, Mai Da Dieu, Ong Quyen and Xom Trai, Vietnam (Ha Va Tan, 1980;Hoang Xukn Chinh, 199111. ...