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    Molecular and morphological description of Myxidium parvum (Cnidaria) from Salaria pavo (Blenniidae) in the Black Sea
    (Elsevier Ireland Ltd, 2022) Gurkanli, C. T.; Okkay, S.; Ciftci, Y.; Ozer, A.
    Members of the predominantly coelozioc genus Myxidum Butschli, 1882 with more than 232 species have been reported from a wide variety of marine and freshwater fish species worldwide. In this study, 25 specimens of peacock blenny, Salaria pavo, were collected from Sinop on the Turkish Black Sea coast. The gills, fins, skin, urinary bladder, gal bladder, kidney, liver, gonads and smooth muscle tissue of the collected samples were investigated for myxosporean parasites. Myxidium parvum Yurakhno, 1991 was the only myxosporean found in the gall bladder of host fishes. Based on spore morphology, M. parvum had mostly overlapping measurement data of original description in spore length and width, polar capsule length but differed slightly in width; however, they were within the ranges previously reported from other blenniid host fish species in the Black Sea. Moreover, in this study, molecular analysis of the 18S rDNA gene of M. parvum isolates from S. pavo was done for the first time and our M. parvum genotypes appeared as sister to Myxidium incurvatum within the Lineage II of the marine Myxidium clade.
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    Morphological and molecular descriptions ofSphaeromyxa sevastopoli(Cnidaria) from host fishes from Sinop on the Black Sea coast
    (Springer, 2020) Okkay, S.; Gurkanli, C. T.; Ciftci, Y.; Yurakhno, V.; Ozer, A.
    Members of the genusSphaeromyxaThelohan, 1892 have been reported from a wide variety of fish species worldwide. In the present study, specimens of rusty blenny,Parablennius sanguinolentus, collected from Sinop on the Turkish Black Sea coast were investigated for myxosporean parasites by using both conventional and molecular methods.Sphaeromyxa sevastopoliNaidenova1970was the only myxosporean parasite found in the gall bladder of host fishes. The morphology peculiarities of obtainedS. sevastopolispores are in good agreement with those of original description and the morphometric data overlapped in spore length and width but differed in polar capsule length and width; however, they were within the ranges previously reported from 18 host fish species. Moreover, in the present study, molecular analysis of the 18S rDNA gene ofS. sevastopoliisolate in ourP. sanguinolentusas well as isolates from shore rocklingGaidropsarus mediterraneusand knout gobyMesogobius batrachocephaluswhich were previously morphologically identified and reported by Okkay and ozer (Acta Zool Bulg 72(1):123-130,2020) was done for the first time and our threeS. sevastopoligenotypes were allocated to the balbianii group which is characterized by straight or slightly curved and fusiform or ovoid spores with ovoid polar capsules.
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    Morphology and molecular phylogeny of Ortholinea mullusi sp nov (Myxozoa) in Mullus barbatus from the Black Sea
    (Inter-Research, 2018) Gurkanli, C. T.; Okkay, S.; Ciftci, Y.; Yurakhno, V.; Ozer, A.
    Myxosporeans of the genus Ortholinea have a worldwide distribution and infect organs and tissues of exclusively marine fishes. Here we describe the morphological and molecular characteristics of Ortholinea mullusi sp. nov. parasitizing the urinary bladder and kidney tubules of red mullet Mullus barbatus collected from the coastal zone of Sinop in the Black Sea, Turkey. Polysporic plasmodia with immature spores were either elongate, 37.0 +/- 4.5 SD (30-50) mu m long and 45.0 +/- 3.8 (40-55) mu m wide, or were round, up to 100.0 mu m in diameter. Mature, free spores were spherical in the frontal view and measured 9.3 +/- 0.2 (9.0-9.7) mu m in length, 8.7 +/- 0.3 (8.2-9.3) mu m in width and 7.7 +/- 0.1 (7.5-7.9) mu m in thickness. We observed 2 polar capsules of equal size, which measured 3.1 +/- 0.1 (3.0-3.2) mu m long by 2.5 +/- 0.1 (2.4-2.6) mu m wide, and the tips of the polar capsules were open towards the sutural line. The prevalence of infection by O. mullusi sp. nov. was 24.5%. Phylogenetic analysis based on nuclear small subunit ribosomal DNA (SSU rDNA) clearly suggested O. mullusi to be a new species, clustered within a lineage comprising O. labracis and O auratae. Pairwise nucleotide similarities and DNA distance values between O. mullusi sp. nov. and sister Ortholinea species also supported this suggestion.
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    Two novel myxosporean parasites in Black Sea fishes: Kudoa niluferi sp nov and Kudoa anatolica sp nov (Cnidaria: Myxosporea)
    (Inter-Research, 2018) Ozer, A.; Okkay, S.; Gurkanli, C. T.; Ciftci, Y.; Yurakhno, V
    Members of the genus Kudoa are typically histozoic and only a few are coelozoic parasites, mainly in marine fishes. In the present study, 2 novel Kudoa species were recovered and described as Kudoa nilufen sp. nov. in the musculature of Neogobius melanostomus and Kudoa anatohca sp. nov. in the musculature, urinary bladder and kidney of Athenna hepsetus collected from the coast of Smop on the Black Sea. Means +/- SI.) (ranges) of mature spores of K. nilufen sp. nov. were 5.9 +/- 0.1 (5.7-6.1) mu m in length, 9.2 +/- 0.2 (8.8-9.5) mu m in width and 7.5 +/- 0.3 (7.0-8.1) mu m in thickness, while those of K. anatohca sp. nov. were 4.1 +/- 0.3 (3.5-4.1) mu m in length, 7.1 +/- 0.2 (6.7-7.2) mu m in width and 5.7 +/- 0.2 (5.3-6.0) mu m in thickness. In both parasite species, length and width of the 4 polai capsules were not equal and formed 3 distinct size classes, largest (1), intermediate (2) and smallest (1) in size. The prevalence and intensity of infection by K. nilufen sp. nov. were 12.8% and 20-29 parasites (per field-of-view, at 200x magnification), respectively, in the musculature of N. melanostomus. These values for K. anatohca sp. nov. were 32.1 % and 10-19 parasites in the musculature as well as 2.9% and 20-29 parasites jointly in the kidney and urinary bladder of A. hepsetus. Phylogenetic analysis based on nuclear small subumt rDNA also suggested K. nilufen and K. anatohca as 2 novel species. These species appealed m the same lineage with K. nova and formed a Black Sea lineage.