Dermophthirioides pristidis n. gen., n. sp. (Microbothriidae) from the Skin and Neoheterocotyle ruggierii n. sp. (Monocotylidae) from the Gills of the Smalltooth Sawfish, Pristis pectinata

Skin lesions in captive lemon sharks Negaprion brevirostris (Carcharhinidae) associated with the monogenean Neodermophthirius harkemai (Microbothriidae)

“…Other clinical signs, such as rubbing and grey patches on the skin have previously been associated with Dermophthirius nigrelli and Dermophthirioides pristidus (Cheung et al 1982, Cheung & Nigrelli 1983. Disease onset, 1 mo after introduction of shark C into the exhibit tank, is consistent with other reports of clinical signs appearing 1 to 3 mo after sharks enter the aquarium (Cheung et al 1982, 1988, Cheung & Nigrelli 1983, Cheung & Ruggieri 1983.…”

“…The stained whole parasites (n = 6) ( Fig. 3) were 2.0 to 5.0 mm long and 0.5 to 1.2 mm wide; the unusual haptor, characteristic for the family Microbothriidae, was very small and muscular, and lacked hooks, clamps, suckers, and septa; numerous testes (10 or l l in 3 specimens) were characteristic of Neodermophthiiius; other m~crobothrids have a single testis (Microbothrium), or a pair of testes (Dermophthirioides and Dermophthirius) (Cheung & Nigrelli 1983, Hendrix 1994. The ovary was approximately rectangular, and situated anterior to the testes.…”

“…In aquaria, infections are intensified, and microbothriid monogeneans may become problematic Monogenean parasites commonly infect the body on requiem sharks (Carcharhinidae), leading to dissurfaces of wild elasmobranchs (Cheung et al 1982, ease and death (Cheung et al 1982, Cheung & Nigrelli Cheung & Nigrelli 1983, Cheung & Ruggieri 1983, 1983, Cheung & Ruggieri 1983, Cheung et al 1988, Rand et al 1986 (Cheung et 1982).…”

A new genus and new species of microbothriid monogenean (Platyhelminthes) with a functionally enigmatic reproductive system, parasitic on the skin and mouth lining of the largetooth sawfish, Pristis microdon, in Australia

“…A preliminary examination of the reproductive systems of microbothriids from the skin and mouth lining of the largetooth sawfish, Pristis microdon, revealed features that were fundamentally different from those of L. minor, demanding a detailed anatomical study. Moreover, parasites from the largetooth sawfish appeared to be undescribed and different both generically and specifically from other microbothriids, including Dermoph-*Corresponding author: g.kearn@uea.ac.uk Unauthenticated Download Date | 5/10/18 9:11 AM thirioides pristidis Cheung et Nigrelli, 1983 from the skin of the closely related smalltooth sawfish, P. pectinata.…”

“…The parasite has 2 juxtaposed testes and differs from other microbothriids in possessing a unique and unusual terminal male reproductive tract comprising a proximal and a distal tube, the latter with a conspicuous opening on the ventral surface and lacking a recognisable male copulatory organ. The smalltooth sawfish, P. pectinata, also has a skin-parasitic microbothriid, Dermophthirioides pristidis Cheung et Nigrelli, 1983, but this parasite species has a prominent copulatory papilla. Dermopristis paradoxus also has parallel ridges with broad tops running in a roughly transverse direction across the ventral surface of the body.…”