Ophryoscolex Stein, 1858 (Protozoa: Ciliophora: Entodiniomorphida) cinsi hakkında morfolojik ve taksonomik araştırmalar

Bu çalışmada izmir civarındaki salhanelerde kesilen toplam 30 evcil sığır (Bos taurus L.)'dan elde edilen işkembe içerikleri Ophryoscolex cinsine dahil siliyatlar açısından incelenmiştir. Araştırma sonucunda cins içerisine dahil edilen siliyatların önceden bazı araştırıcıların yaptıı gibi kaudal ışınlanma özellikleri (1) ve ikincil ışın halkası sayısına dayalı olarak (2) tür düzeyinde ele alınamıyacakları anlaşıldı. Bu durum sığırlarımızda sözkonusu karakterler açısından bazı ara populasyonların saptanmış olması ve istatistiki analiz yöntemleri ile gösterilmiştir. Sürekli varyasyonlar gösteren bu tip karakterler için en uygun sınıflandırmanın "forma" sınıflandırması olduğu ortaya çıkartılmıştır. Bu nedenle cins yeniden gözden geçirilmiş ve priorite ilkesi gözönünde tutularak önceden iki ayrı tür olarak tanımlanmış olan O. purkynjei ile O. caudatus, O. purkynjei altında birleştirilmiştir. Ayrıca 0. purkynjei'ye dahil 3 yeni forma (O. p. f. purkynjei n. f.. O, p. f. bifıdobicinctus n. f. ve O. p. f. bifidoquadricinctus n. f.) tanımlanmış ve yeni bir tayin anahtarı (s. 28) önerilmiştir.

Morphological and taxonomical investigations on the genus of Ophryoscolex Stein, 1858 (Protozoa: Ciliophora: Entodiniomorphida)

Rumen contents obtained from 30 domesticated cattle {Bos taurus L), slaughtered at abattoirs in the vicinity of Izmir, were surveyed for ciliates belonging to the genus of Ophryoscolex. Results of this survey suggested that the ciliates in this two genus should not be classified to the species level on the basis of caudal spination characteristics or the number of the rings of secondary caudal spines, as previously proposed (1, 2). Populations intermediate in these characteristics were detected in Turkish cattle and analysis of the morphometrical data for all criteria did not indicate significant differences for establishing separate species. It appears that these features, which show continuous variation, are more appropriate for classification as formae. Therefore, this genus has been revised. 0. purkynjei and 0. caudatus, previously described as two different species, are now considered as the same species, 0. purkynjei, according to the priority in Systematic Zoology. Three new formae (0. p. f. purkynjei n. f., O. p. f. bifıdobicinctus n. f. and 0. p. f. bifidoquadricinctus n. f.), all belonging to 0. purkynjei are described and a new key proposed for identification (p. 28).

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