LIGHT AND ELECTRON-MICROSCOPY OF METANOPHRYS DIMINUTA N-SP

Metanophrys diminuta n. sp., a marine philasterine scuticociliate coll ected from the south Florida coast, was preserved for transmission ele ctron microscopy using a mixed fixation technique. Rough endoplasmic r eticulum profiles were found proximal to mitochondria and within mitoc hondrial fenestrations (or deep pockets). In longitudinal sections mit ochondrial profiles appear to be very long, occupying almost the entir e length of the cell. The micronucleus is roughly spherical to ovoid, semi-enclosed in the macronucleus. The oral polykinetid #1 is composed of two files of kinetosomes. The c segment of the oral dikinetid is c omposed of three to four kinetosomes. This species is the smallest wit hin the genus Metanophrys.