Pseudorhabdosynochus cyathus

Pseudorhabdosynochus cyathus
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Monogenea
Order:	Dactylogyridea
Family:	Diplectanidae
Genus:	Pseudorhabdosynochus
Species:	P. cyathus
Binomial name
	Pseudorhabdosynochus cyathus; Hinsinger & Justine, 2006

Pseudorhabdosynochus cyathus is a diplectanid monogenean parasitic on the gills of the grouper . It has been described in 2006. ^[1]

Description[]

Pseudorhabdosynochus cyathus is a small monogenean, 0.4 mm-1.2 mm in length. 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, resembling to what is found in P. cupatus.^[1]

Etymology[]

Cyathus is Latin for cup, bowl. Pseudorhabdosynochus cyathus was named with reference to P. cupatus (cupatus means ‘‘in form of cup’’), and refers to the cup-shape of the squamodiscs in live specimens.^[1]

Hosts and localities[]

The type-host and only recorded host of P. cyathus is the grouper (Serranidae: Epinephelinae). The type-locality and only recorded locality is off Nouméa, New Caledonia.^[1] It was found in New Caledonia that large host fish, Epinephelus howlandi, harboured only P. venus Hinsinger & Justine, 2006 and that small hosts (of fork length less than 300–350 mm) harboured only P. cyathus. Only one fish, of intermediate length, was found with both species of parasites.^[1]

References[]

^ ^a ^b ^c ^d ^e Hinsinger, Damien D.; Justine, Jean-Lou (2006). "The 'Pseudorhabdosynochus cupatus group' (Monogenea: Diplectanidae) on Epinephelus fasciatus, E. howlandi, E. rivulatus and E. merra (Perciformes: Serranidae) off New Caledonia, with descriptions of Pseudorhabdosynochus cyathus n. sp. and P. calathus n. sp". Systematic Parasitology. 64 (2): 69–90. doi:10.1007/s11230-005-9018-2. ISSN 0165-5752. PMID 16773473.
^ 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.

[HinsingerJustine2006cupatus-1] Hinsinger, Damien D.; Justine, Jean-Lou (2006). "The 'Pseudorhabdosynochus cupatus group' (Monogenea: Diplectanidae) on Epinephelus fasciatus, E. howlandi, E. rivulatus and E. merra (Perciformes: Serranidae) off New Caledonia, with descriptions of Pseudorhabdosynochus cyathus n. sp. and P. calathus n. sp". Systematic Parasitology. 64 (2): 69–90. doi:10.1007/s11230-005-9018-2. ISSN 0165-5752. PMID 16773473.

[Kritsky1986-2] 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.

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