Molecular and morphological description of Ceratomyxa scophthalmi sp. nov. (Myxozoa) infecting Scophthalmus maeoticus and first report of Myxidium finnmarchicum in the Black Sea

Özer A., Gürkanlı C. T., Okkay S., Çiftçi Y., Yurakhno V.

Diseases of aquatic organisms, cilt.151, ss.85-96, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 151
  • Basım Tarihi: 2022
  • Doi Numarası: 10.3354/dao03693
  • Dergi Adı: Diseases of aquatic organisms
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, EMBASE, Geobase, Veterinary Science Database
  • Sayfa Sayıları: ss.85-96
  • Anahtar Kelimeler: Scophthalmus maeoticus, Black Sea brill, 18S rDNA, Molecular phylogeny, Ceratomyxa scophthalmi, Myxidium finnmarchicum, Cnidaria, Black Sea, WHITING MERLANGIUS-MERLANGUS, N. SP MYXOSPOREA, PISCES TELEOSTEI, CNIDARIA MYXOZOA, RIBOSOMAL DNA, GALL-BLADDER, PARASITE, PHYLOGENY, FISH, ULTRASTRUCTURE
  • Kocaeli Üniversitesi Adresli: Evet

Özet

In the present study, 2 species of myxozoan parasites, the novel Ceratomyxa scophthalmi sp. nov. and Myxidium finnmarchicum, were documented from the gallbladder of Scophthalmus maeoticus inhabiting the Turkish Black Sea coast at Sinop. C. scophthalmi sp. nov. had mostly spherical, clavate, and fine-grained polymorphic plasmodia that ranged in diameter from 16.0 to 29.0 µm. Spores were arcuate with a convex anterior margin and concave posterior. Valves of spores were highly elongated and unequal in thickness with one valve 1.1-1.3 times thicker than the other. Valves narrowed gradually toward slightly truncated ends. The mean (range) dimensions of spores were 9.4 (8.5-10.0) µm in length and 49.6 (44.5-55.0) µm in thickness, with polar capsules that were 3.1 (2.7-3.5) µm in length and 3.2 (2.7-3.5) µm in width. Polar filaments were coiled with 4-5 turns. Large numbers of immature forms of C. scophthalmi sp. nov., which were often 'crumpled', and mature forms were found together in the gallbladder bile. Along with morphological differences, phylogenetic analysis based on 18S rDNA, including pairwise nucleotide similarities with other related Ceratomyxa species, suggests C. scophthalmi as a novel species. Moreover, this report provides the first morphological and molecular descriptions of M. finnmarchicum outside of its original geographical location and type host species.