In zoology terms the difference between xiphosuran and xiphosauran
is that xiphosuran is of or pertaining to the order Xiphosura while xiphosauran is any of many marine chelicerates of the order Xiphosura; the horseshoe crabs.
As an adjective xiphosuran
is of or pertaining to the order Xiphosura.
xiphosuran
English
Noun
(
en noun)
(zoology) Any member of the order Xiphosura, including horseshoe crabs.
Adjective
(-)
(zoology) Of or pertaining to the order Xiphosura.
xiphosauran
English
Noun
(
en noun)
(zoology) Any of many marine chelicerates of the order Xiphosura ; the horseshoe crabs