Lobocapillaria austropacifica n. g., n. sp. (Nematoda: Capillariidae) from the obtuse barracuda Sphyraena obtusata Cuvier (Sphyraenidae, Perciformes) off eastern Australia

Abstract

Based on light and scanning electron microscopical studies, a new nematode parasite, Lobocapillaria austropacifica n. sp. (Capillariidae), is described from the gall-bladder of the marine fish (obtuse barracuda) Sphyraena obtusata Cuvier (Perciformes: Sphyraenidae) from off the eastern Pacific coast of Australia, for which a new genus Lobocapillaria n. g. is established. This new genus is mainly characterised by a single row of stichocytes, the presence of two large, conspicuously elongated lateral caudal lobes and a pair of subventral papillae at their base in males, a flat spicule distended laterally towards its proximal end and provided with superficial rough transverse grooves, a spicular canal and a very long, aspinose spicular sheath with a conspicuous expansion near its proximal end when evaginated. Capillaria sphyraeni Parukhin, 1971 is transferred to Lobocapillaria as L. sphyreni (Parukhin, 1971) n. comb. A key to capillariid genera containing species parasitic in fishes is provided.

Redescription and molecular characterization of Baruscapillaria spiculata (Nematoda: Capillariidae) parasitizing the Neotropic cormorant Phalacrocorax brasilianus from two Argentinian lagoons

“…The family Capillariidae (Trichocephalida: Trichinelloidea) consists of nearly 400 nominal species parasitizing six vertebrate classes distributed worldwide (Moravec 2001;Hodda 2011). Moravec (1982), based mainly on morphological features of the male caudal end, provisionally proposed 16 genera to which another 11 were later added, either by the erection of new genera, revalidation of older genera, or raising of subgenera to genera (Moravec and Cosgrove 1982;Mas-Coma and Esteban 1985;Moravec 1987; Baruš and Sergeeva 1990a, b;Yu and Wang 1994;Moravec and Spratt 1998;Moravec et al 1999;Moravec 2001;Moravec and Beveridge 2017). However, some of these proposed genera fell into synonymy and the later classification (Moravec 2001) listed 22 genera and 17 subgenera.…”

Additional morphological characters of the nematode Capillostrongyloides fritschi (Travassos, 1914) Moravec, 1982 (Nematoda: Capillaridae) from Bagrus spp. (Bagridae) inhabiting Damietta Branch of the River Nile, Egypt with a special reference to evaginated cirrus

“…In Paracapillaroides acanthocotylus Rossin & Timi, 2009 , evaginated cirrus consists of a short, cup-shaped, spinose, proximal part and a long, narrower, tubular, non-spiny distal part, indicating the absence of the spherical bulb and the funnel-shaped distal region. The evaginated cirrus is an ampulla-shaped structure in Amphibiocapillaria combesi Chabaud & Knoepffleri, 1985, a very long cylindrical tube with protruding spicule in Capillaria ( Capilloroides ) catenate Van Cleave & Mueller, 1932, Amphibiocapillaria tritoniscnstati (Diesing, 1861) Moravec, 1982, and A. tritonispunctati (Diesing, 1851) Moravec, 1982, a very long tubular structure without spicule in Paracapillaria (Ophidiocapillaria) cesarpintoi (Freitas & Lent, 1931) Moravec, 1986, a very long tube with a globular expansion at its proximal end in Lobocapillaria austropacifica (see Moravec & Beveridge, 2017 ) or a bell-shaped and relatively short cylindrical tube with the spicule projecting from its opening in Paratrichosoma recurvum (Solger, 1877) Ashford & Muller, 1978. As in the present study, most of the previously described evaginated cirri are covered with transverse cuticular folds (e.g., Pseudocapillaria ( Pseudocapillaria ) carangi (Parukhin, 1971) Moravec, 1982.…”

Community of macroparasites of the Pacific barracuda Sphyraena ensis Jordan and Gilbert, 1882 (Perciformes, Sphyraenidae) from the north coast of Peru

“…Several species of marine fish of the genus Sphyraena Artedi, 1793 have been evaluated in relation to their macroparasite communities in Kuwait (Abdul-Salam andSreelatha, 1993, 1995), China (Zhang et al, 2003), India (Ravichandran et al, 2007), Mexico (Gómez del Prado-Rosas et al, 2007), New Caledonia (Moravec and Justine, 2015), Australia (Moravec and Beveridge, 2017) and Tunisia (Boussellaa et al, 2018), among others.…”