The Collaborative International Dictionary of English v.0.48:

Morphologist \Mor*phol"o*gist\, n. (Biol.)
   One who is versed in the science of morphology.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "morphologist":
   anatomist, anatomy, angiography, angiology, anthropotomy,
   geomorphology, histologist, histology, morphology, myography,
   myology, organography, organology, osteography, osteology,
   splanchnography, splanchnology, tectology, zootomy