Descriptions of Philometra aenei n. sp. and P. tunisiensis n. sp. (Nematoda: Philometridae) from Epinephelus spp. off Tunisia confirm a high degree of host specificity of gonad-infecting species of Philometra Costa, 1845 in groupers (Serranidae)

Systematic Parasitology
František MoravecJean-Lou Justine

Abstract

Based on light and electron microscopical studies of males and mature females, two new gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) are described from the ovary of groupers, Epinephelus spp. (Perciformes; Serranidae), in the Mediterranean Sea off Tunisia (near Sfax): Philometra aenei n. sp. from the white grouper E. aeneus (Geoffroy Saint-Hilaire) and P. tunisiensis n. sp. from the goldblotch grouper E. costae (Steindachner). Identification of both fish hosts was confirmed by barcoding of the infected fish specimens. Philometra aenei is mainly characterised by the length of conspicuously distended spicules (108-123 µm), the presence of a distinct dorsal barb at the middle region of the gubernaculum and a distinct protuberance consisting of two dorsolateral lamellar parts separated from each other by a smooth median field at its distal tip, a V-shaped mound on the male caudal extremity and by the body length of the males (2.34-3.05 mm). The male of this species was found to possess minute deirids in the cervical region, which is quite exceptional within the Philometridae. Philometra tunisiensis is distinguished from other gonad-infecting congeneric species parasitising serranids by the length of th...Continue Reading

References

Jan 1, 1963·Journal of Helminthology·S RASHEED
Oct 11, 2005·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Robert D WardPaul D N Hebert
Sep 12, 2008·Molecular Ecology Notes·Sujeevan Ratnasingham, Paul D N Hebert
May 20, 2014·Parasite : Journal De La Société Française De Parasitologie·František Moravec, Jean-Lou Justine
Aug 6, 2014·PloS One·Charlotte SchoelinckJean-Lou Justine

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