KARYOTYPE OF AN AVIAN SCHISTOSOME TRICHOBILHARZIA-SZIDATI (DIGENEA, SCHISTOSOMATIDAE)

Spakulova M., Horak P. & KraL'ova I. 1996. Karyotype of an avian schis tosome Trichobilharzia szidati (Digenea: Schistosomatidae). Internatio nal Journal for Parasitology 26: 783-785. Somatic: chromosomes of Tric hobilharzia szidati Neuhaus, 1952 are described from larval stages dis sected from snails, air-dried on slides and stained with Giemsa and C- banding technique, used for the first time in Trichobilharzia sp. The karyotype consisted of 7 autosomal pairs and 1 pair of sex chromosomes , ZZ in the male and ZW in the female, where Z and W chromosomes are o f different sizes and both are classified as submetacentric. C-handing aided in identification of chromosomes Nos 4, satellited 6 and 8. No heterochromatin was observed in the W chromosome. The results were not in agreement with those previously reported and represent new finding s. The possible explanation for this fact is given. Copyright (C) 1996 Australian Society for Parasitology.