Added on May 21, 2011:
Correction: Some epithelial cells existed in Martian testis
Sorry, I re-checked my above post dated 3 months ago, and found I had mis-identified a fossilized Martian epithelium as existing in the epididymis. In fact, that epithelim was cuboidal epithelium that existed in the testis, not in the epididymis. Other epithelia identified in this thread existed in the epididymis.
A human epithelium in testis is displayed at Boston University Histology
Learning System http://www.bu.edu/histology/p/17102loa.htm