Nispeten az bilinen bir monogenean olan Dactylogyrus cornu Linstow, 1878’in Türkiye’nin Sinop bölgesindeki Karadeniz’e dökülen küçük bir derede bulunan e¤rez bal›¤› Vimba vimba tenella Nordmann, 1840’taki infestasyonu araflt›r›ld›. Haziran 2000 tarihinde toplam olarak 122 adet bal›k incelendi. Ortalama infestasyon oran› ve yo¤unlu¤u, s›ras›yla % 100 ve 147,7 ± 7,9 parazit / infekte bal›k olarak belirlendi. D. cornu konak bal›¤›n sadece solungaçlar›nda bulundu ve sol ve sa¤ taraftaki solungaç yaylar›ndan sadece ikinci solungaç yay›ndaki filamentlere olan muhtemel bir yer seçicili¤i tespit edildi. Parazitlerin difli ve daha büyük bal›klarda yerleflti¤i görüldü. 

The infestation by a relatively less known monogenean, Dactylogyrus cornu Linstow, 1878, was investigated on vimba, Vimba vimba tenella Nordmann, 1840 in a small stream pouring into the Black Sea in Sinop, Turkey. A total of 122 fish specimens were examined in June 2000. The overall infestation prevalence and mean intensity levels were 100% and 147.7 ± 7.9 parasites per infested fish, respectively. D. cornu was recorded only on the gills of host fish and possible site specificity to the filaments of the second gill arches of the left and right gill arch sets was recorded. The parasite was also found to be settled more on female and larger host fish.