ikfiio fu'ivla

x1 is a icthyosaur [member of order Ichthyosauria] of subtaxon/type/genus/species/variety/breed x2.

See also: dinso, dinsauru, plesiio, disrmuzo, rexsa, ketslau.

In notes:

x1 is a 'dinosaur' [very general: any ancient quasi-reptilian vertebrate or, possibly but probably not, modern bird] of type x2 living in era x3.
x1 is a plesiosaur [member of order Plesiosauria] of subtaxon/type/genus/species/variety/breed x2.