Bantayanon has 16 consonantal phonemes and 3 vocalic phonemes. Protruded rounding is the vocalic equivalent of consonantal labialization. Finals with vocalic codas generally parallel those with dental or velar codas. The close front unrounded vowel is the vocalic equivalent of the palatal approximant . The close front rounded vowel is the vocalic equivalent of the labialized palatal approximant . Another principle of vocalic dialectization follows the Indo-European ablaut series or vowel grades. It is normally a labialized velar, as is its vocalic cousin . Middle Chinese had a three-way tonal contrast in syllables with vocalic or nasal endings. A typical Aslian vowel system is displayed by Northern Temiar, which has 30 vocalic nuclei. However, from the PIE perspective, only the thematic ("o-")stems are truly vocalic. This mechanism can be described as a form of anaptyxis (vocalic epenthesis). Middle Chinese syllables with vocalic or nasal codas had a three-way tonal contrast. Vocalic assonance is an important element in verse. This change likely took place after the vocalic changes described above occurred. Since those are known to be vocalic, they are not in parenthesis.