As nouns the difference between vicarian and vicariant
is that vicarian is (obsolete) a vicar while vicariant is any of a set of species, in separate geographical locations, that have arisen through vicariance.
As an adjective vicariant is
of, relating to, or as a result of vicariance.
vicariant
English
Adjective
(-)
Of, relating to, or as a result of vicariance
Noun
(
en noun)
Any of a set of species, in separate geographical locations, that have arisen through vicariance