Punctator

In the Hebrew notation the one dot for [i] and the two dots for [e] go back to the Nestorian punctators; but in Hebrew they are used exclusively to stand for these vowel

Source: wiktionary

The punctator calls their names and keeps an account of the absent.

Source: wiktionary

The punctator must note as absent those who come to mass after the last Kyrie, those who do not chant, those who talk or who wander about in the choir, who leave beforre the end of mass, and those who do not wear the choral dress.

Source: wiktionary

In collegiate churches it was often one of the singers who performed the role of punctator, and he sent his report to the maître de chapelle or the chapter as a whole.

Source: wiktionary