Infraciliature and silverline system of the ciliate Pseudotrachelocerca trepida (Kahl, 1928), nov. gen., nov. comb., and establishment of a new family, the Pseudotrachelocercidae nov. fam. (Ciliophora, Haptoria). European Journal of Protistology, 26(2) 1990: 160-166. 161 [Zoological Record Volume 127]