The following is the entry for this language as it appeared in the 14th edition (2000).
It was superseded by the corresponding entry in the 15th edition (2005). See also the corresponding entry in the current edition of Ethnologue.
SIL code: ATZ
ISO 639-2: phi
| Population | 16 or 17 speakers, including 12 in Villa Santiago, 1 in Villa Gracia, 3 or 4 in Nagtipunan (1992 L. Reid). |
| Region | Quirino Province, town of Aglipay, Villa Santiago and Villa Gracia, and town of Nagtipunan. |
| Classification | Austronesian, Malayo-Polynesian, Western Malayo-Polynesian, Northern Philippine, Northern Luzon, Arta. |
| Comments | Not linguistically close to any other language (Lawrence Reid). Other families are intermarried with Ilocano speakers or are bilingual in Casiguran Dumagat Agta. Negrito. Three families speak Arta in the home. |
