01963naa a2200289 a 450000100080000000500110000800800410001902400520006010000240011224502070013626000090034352010170035265000200136965000180138965000200140765000140142765000130144165000240145465000140147865000210149265300170151370000230153070000230155370000180157670000210159477300580161521707562024-12-26       2024    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s11686-024-00864-52DOI1 aYAMADA, P. de O. F.  aA new species of Anacanthorus (Dactylogyridae, Anacanthorinae) parasitizing gills of Hoplias aff. malabaricus (Bloch, 1794) (Characiformes, Erythrinidae) from the Caatinga domain.h[electronic resource]  c2024  aIntroduction: Anacanthorus silvoi n. sp. (Dactylogyridae, Anacanthorinae) is described from the gills of Hoplias aff. malabaricus (Bloch, 1794) from the Salgado River, Ceará state, Brazil. Materials and Methods: The monogeneans were affixed onto slides using Gray and Wess’s medium for examination of their sclerotized structures. For analysis of internal organs, a single specimen was preserved in 5% formalin, stained with Gomori’s trichrome, and mounted in Gray and Wess’s medium. Results: Anacanthorus silvoi n. sp. is characterized by having a short broad tube MCO with a medial constriction (i.e., MCO with distal region wider than the proximal region, and flexed lateral flap in the distal region in A. cururutuiensis and a MCO with a small projection in the form of a hook in the distal region in A. siphonocommus). Conclusions: The present study corroborates previous studies that the absence of an accessory piece is a characteristic shared by all Anacanthorus members parasites of Erythrinidae.  aAnimal taxonomy  aEctoparasites  aFreshwater fish  aMonogenea  aTaxonomy  aPeixe de Água Doce  aTaxonomia  aTaxonomia Animal  aEctoparasita1 aDINIZ, M. F. B. G.1 aSOUSA, W. B. B. de1 aYAMADA, F. H.1 aTAVARES-DIAS, M.  tActa Parasitologicagv. 69, n. 4, p. 1729-1735, 2024.