New species of the Monocotylidae (Monogenea) from the stingray Dasyatis tortonesi Capape (Euselachii, Dasyatidae) off the Tunisian coast, with comments on host-specificity and the specific identities of Mediterranean stingrays. Systematic Parasitology, 47(1), September 2000: 43-50. 47 [Zoological Record Volume 136]