The symbol in the International Phonetic Alphabet that represents the place of articulation of these sounds is . The symbol is not an exclamation mark in origin, but rather a vertical bar with a subscript dot, the dot being the old diacritic for retroflex consonants. Prior to 1989, (stretched c) was the IPA letter for the alveolar clicks, and this is still preferred by some phoneticians. The tail of may be the tail of retroflex consonants in the IPA, and thus analogous to the underdot of . Either letter may be combined with a second letter to indicate the manner of articulation, though this is commonly omitted for tenuis clicks.