Pseudorhabdosynochus magnisquamodiscum explained

Pseudorhabdosynochus magnisquamodiscum is species of diplectanid monogenean parasitic on the gills of a fish. It was described in 1984 under the name Cycloplectanum magnisquamodiscum ^[1] and later transferred to the genus Pseudorhabdosynochus.^[2]

Description

Pseudorhabdosynochus magnisquamodiscum is a small monogenean.^[1] 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.^[3]

Host

The type-host is the four-banded butterflyfish Chaetodon hoefleri.^[1] Most other species of the genus Pseudorhabdosynochus have been found on grouper (family Serranidae), and no other Pseudorhabdosynochus species has ever been recorded from a butterflyfish.^[4] It has been suggested that the host record was either accidental or erroneous.^[5]

Notes and References

1. Aljoshkina . L. D. . 1984 . [New species of the family Diplectanidae (Monogenea) in the South-West Atlantic] . Zoologicheskii Zhurnal . 63 . 1253–1256 .
2. Santos. Cláudia Portes. Buchmann. Kurt. Gibson. David I.. Pseudorhabdosynochus spp. (Monogenea: Diplectanidae) from the gills of Epinephelus spp. in Brazilian waters. Systematic Parasitology. 45. 2. 2000. 145–153. 0165-5752. 10.1023/A:1006232029426. 10743859. free.
3. 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 .
4. Kritsky. Delane C.. Bakenhaster. Micah D.. Adams. Douglas H.. Pseudorhabdosynochus species (Monogenoidea, Diplectanidae) parasitizing groupers (Serranidae, Epinephelinae, Epinephelini) in the western Atlantic Ocean and adjacent waters, with descriptions of 13 new species. Parasite. 22. 2015. 24. 1776-1042. 10.1051/parasite/2015024. 26272242. 4536336.
5. Justine. Jean-Lou. Parasite biodiversity in a coral reef fish: twelve species of monogeneans on the gills of the grouper Epinephelus maculatus (Perciformes: Serranidae) off New Caledonia, with a description of eight new species of Pseudorhabdosynochus (Monogenea: Diplectanidae). Systematic Parasitology. 2007. 66. 2. 81–129. 10.1007/s11230-006-9057-3. 16972153. 7737882 .