Typhlomangelia principalis was created in 1912.
Typhlomangelia maldivica was created in 1996.
Typhlomangelia nivalis was created in 1846.
Typhlomangelia pyrrha was created in 1881.
Typhlomangelia polythele was created in 1963.
Typhlomangelia lincta was created in 1881.
Typhlomangelia fluctuosa was created in 1881.
Typhlomangelia adenica was created in 1996.
Typhlomangelia cariosa was created in 1886.
Vox principalis means "principal voice" in Latin. In music it refers to a preexisting melody, derived from Gregorian chant, to which Medieval composers would add other voices to produce compositions known as organa (singular organum).
English principal (the head of a school or organization) comes from Latin principalis (main person).
Vox principalis or principal voice sings the melody.
Eduard Leontjevich Blaschke has written: 'Topographia medica portus Novi-Archangelscensis, sedis principalis coloniarum rossicarum in Septentrionali America' -- subject(s): Sanitary affairs, Description and travel