thiruvalangadu is a proper devara paadal petra sthalam a vaiputhalam is a temple sung about in another temple. for example appar has sung about mylapore somewhere else. so till sambanthar came here it was a vaiputhalam. other temples about which samaya kuravar have sung from faraway
and are counted as paadal petra sthalams include kedeshwaram and koneeshwaram in lanka. sung from rameshwearam