Abstract
Two new species of Scyphophyllidium Woodland, 1927 are described from the Hooktooth shark, Chaenogaleus macrostoma (Bleeker), from the Persian Gulf, Iran. Scyphophyllidium hormuziense n. sp. is assigned to morphological category 2 of its genus because it possesses bothridial marginal loculi and an apical sucker on each flat bothridium, and lacks bothridial facial loculi. Within category 2, it is distinguished from its congeners, except for S. janineae (Ruhnke, Healy and Shapero, 2006), by possessing, rather than lacking, a prominent cephalic peduncle. It differs from S. janineae in the distribution of the vitelline follicles. Scyphophyllidium iraniense n. sp. is assigned to morphological category 5 because its bothridia are essentially flat and lack proximal apertures, marginal loculi, facial loci and semi-circular muscle bands, and bears weakly serrate gladiate spinitriches on its distal bothridial surfaces. Within its morphological category, the presence of a long cephalic peduncle distinguishes S. iraniense n. sp. from its congeners lacking this structure or possessing a short cephalic peduncle. It further differs from S. arnoldi (Ruhnke and Thompson, 2006) and S. typicum (Subhapradha, 1955) in total length, from S. paulum (Linton, 1897) in lacking a conspicuous band of muscles along the locular periphery of the bothridia, and from S. kirstenae (Ruhnke, Healy and Shapero, 2006) in the distribution of the vitelline follicles. This study brings the number of the valid Scyphophyllidium species of the Persian Gulf to five.
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Acknowledgements
We thank the Iranian Fisheries Science Research Institute for allowing us to examine the sharks sampled under their stock assessment project. All necessary permits for sampling and observational field studies had been defined in that stock assessment project.
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This work was carried out under the grant number 5552 assigned to the first author by the University of Guilan.
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MH conceived, designed, and supervised the research. HKP measured and drew. MH wrote the manuscript. All authors read and approved the manuscript. This article is based on the student (HKP)’s MSc thesis.
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All necessary permits for sampling and observational field studies have been obtained by the authors from the competent authorities, the Iranian Fisheries Science Research Institute, and are mentioned in the acknowledgements. The study is compliant with CBD (Convention on Biological Diversity) and Nagoya protocols.
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Kouchaki Panchah, H., Haseli, M. Two new species of Scyphophyllidium (Cestoda: Phyllobothriidea) from Chaenogaleus macrostoma (Bleeker) (Elasmobranchii: Carcharhiniformes) from the Persian Gulf, Iran. Syst Parasitol 101, 18 (2024). https://doi.org/10.1007/s11230-023-10141-0
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DOI: https://doi.org/10.1007/s11230-023-10141-0