title: Henneguya tunisiensis n. sp. (Myxosporea: Bivalvulida), a new gill parasite of Symphodus tinca (L.) (Teleostei: Labridae) off Tunisia.
abstract: Henneguya tunisiensis n. sp., a new myxosporean, is described from the gill-arches of the East Atlantic peacock wrasse Symphodus tinca (L.) collected from off the Kerkennah Islands, Tunisia. It is characterised by the presence of elongate white plasmodia of 1-1.5 x 1.5-2 mm in size. The mature spores are rounded in frontal view and have two identical polar capsules and two caudal appendages which taper considerably at the end. Both light and electron microscopical data show that this species differs in several morphological features from all previously described Henneguya spp. A molecular analysis, based on 18S rDNA sequence data, indicates that H. tunisiensis n. sp. is readily distinguishable from other myxozoan DNA sequences in GenBank. Phylogenetically, the new species is placed in the marine Henneguya clade, which is a sister group of marine Myxobolus spp. from perciform fishes in Tunisian waters.
authors.affiliation: Département de Biologie, Faculté des Sciences de Tunis, Université Tunis El Manar, 2092, Tunis, Tunisia. Sihem.bahri@fst.rnu.tn
authors.forename: Sihem
authors.initials: S
authors.lastname: Bahri
authors.forename: Szilvia
authors.initials: S
authors.lastname: Marton
authors.forename: Adam
authors.initials: A
authors.lastname: Marques
authors.forename: Edit
authors.initials: E
authors.lastname: Eszterbauer
mesh_terms: D000818:Animals; D005393:Fish Diseases / Q000469:parasitology*; D005880:Gills / Q000469:parasitology*; D008969:Molecular Sequence Data; D055764:Myxozoa / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics; D010273:Parasitic Diseases, Animal / Q000469:parasitology*; D010473:Perciformes / Q000469:parasitology*; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D014416:Tunisia
chemical_list: D012337:RNA, Ribosomal, 18S