Pseudorhabdosynochus amplidiscatus explained

Pseudorhabdosynochus amplidiscatus is a diplectanid monogenean parasitic on the gills of groupers. It was described as Diplectanum amplidiscatum by Bravo-Hollis in 1954 ^[1] and transferred to the genus Pseudorhabdosynochus by Kritsky and Beverley-Burton in 1986.^[2]

Description

Pseudorhabdosynochus amplidiscatus is a small monogenean. The species has the general characteristics of other species of Pseudorhabdosynochus, with a flat body and a posterior haptor, which is the organ by which the monogenean attaches itself to the gill of is host. The haptor bears two squamodiscs, one ventral and one dorsal.The sclerotized male copulatory organ, or "quadriloculate organ", has the shape of a bean with four internal chambers, as in other species of Pseudorhabdosynochus.^[2] The vagina includes a sclerotized part, which is a complex structure.

The species was redescribed by Oliver in 1987^[3] and by Yang, Gibson and Zeng in 2005.^[4]

Hosts and localities

The spotted sand bass (Paralabrax maculatofasciatus) is the type-host of Pseudorhabdosynochus amplidiscatus.^[1] The species has been described from fish caught off the Pacific coast of Mexico. It has also been recorded from the groupers Epinephelus labriformis and Epinephelus analogus from the Pacific coast of Mexico and Panama.^[5]

Notes and References

1. Bravo-Hollis, M. 1954: Diplectanum amplidiscatum n. sp., Trématode monogénétique des branchies d'un poisson marin. Annales de Parasitologie Humaine et Comparée, 24, 37-41.
2. Kritsky . D. C. . Beverley-Burton . M. . 1986 . The status of Pseudorhabdosynochus Yamaguti, 1958, and Cycloplectanum Oliver, 1968 (Monogenea: Diplectanidae) . Proceedings of the Biological Society of Washington . 99 . 17–20 .
3. Guy. Oliver. Les Diplectanidae Bychowsky, 1957 (Monogenea, Monopisthocotylea, Dactylogyridea). Systématique. Biologie. Ontogénie. Écologie. Essai de phylogenèse.. 2015 . Figshare . 10.6084/M9.FIGSHARE.1295274. thesis . free.
4. Yang. Tingbao. Gibson. David I.. Zeng. Bijian. Pseudorhabdosynochus summanoides n. sp. (Monogenea: Diplectanidae) from Epinephelus coioides in Dapeng Bay, South China Sea, with observations on several similar species of Pseudorhabdosynochus Yamaguti, 1958. Systematic Parasitology. 62. 3. 2005. 221–239. 0165-5752. 10.1007/s11230-005-5497-4. 16315082. 7907556 .
5. Mendoza-Franco. Edgar F.. Violante-González. Juan. Rojas Herrera. Agustín A.. Six new and one previously described species of Pseudorhabdosynochus (Monogenoidea, Diplectanidae) infecting the gills of groupers (Perciformes, Serranidae) from the Pacific coasts of Mexico and Panama. Journal of Parasitology. 97. 1. 2011. 20–35. 0022-3395. 10.1645/GE-2716.1. 21348602. 207251069 .