Raphidascaris(Ichthyascaris)etelidisn. sp. (Nematoda, Anisakidae), a new ascaridoid nematode from lutjanid fishes off New Caledonia

Abstract

A new nematode species, Raphidascaris (Ichthyascaris) etelidis n. sp. (Anisakidae), is described from male and female specimens found in the intestine of the deep-water longtail red snapper Etelis coruscans Valenciennes, 1862 (type host) and the crimson jobfish Pristipomoides filamentosus (Valenciennes, 1830) (both Lutjanidae, Perciformes) from off the southwestern coast of New Caledonia, South Pacific. Based on light and scanning electron microscopy examination, the new species differs from other eight representatives of the subgenus Ichthyascaris Wu, 1949 mainly in the length of spicules (345-474 µm), representing 1.5-2.5% of the body length, and in the presence of small cuticular spines on the tail tip of both sexes and 60-65 pairs of male genital papillae of which 12-13 are postanal. This is the first species of this subgenus reported from fishes of the family Lutjanidae and the second nominal species of Raphidascaris (Ichthyascaris) recorded from New Caledonian waters. Unidentifiable juveniles and rarely adults of Raphidascaris (Ichthyascaris) sp. were collected from Lutjanus vitta (Quoy & Gaimard, 1824) (Lutjanidae) and Lethrinus genivittatus Valenciennes, 1830, L. miniatus (Forster, 1801) and L. rubrioperculatus Sato, 1978 (all Lethrinidae). résumé Raphidascaris (Ichthyascaris) etelidis n. sp. (Nematoda, Anisakidae), nouveau nématode ascaridoïde de poissons Lutjanidae de Nouvelle-Calédonie. Une nouvelle espèce de nématode, Raphidascaris (Ichthyascaris) etelidis n. sp. (Anisakidae), est décrite de spécimens mâles et femelles trouvés dans l'intestin

Raphidascaris ( Raphidascaris ) macrouri n. sp. (Nematoda: Anisakidae) from two deep-sea macrourid fishes in the Western Mediterranean: Morphological and molecular characterisations

“…Although species of Raphidascaris are parasites of the digestive tract of a range of marine, brackish and freshwater fishes worldwide [11][12][13][14], adults of just a single species, Raphidascaris (Raphidascaris) mediterraneus Lèbre & Petter, 1983, have been reported to parasitise Chelidonichthys cuculus (Linnaeus) and Chelidonichthys obscurus (Walbaum) in the Mediterranean [15,16], while larval forms of Raphidascaris sp. have been recorded in Mora moro [4].…”

“…[13,31]: R. (R.) acus (Bloch, 1779), which is found in different freshwater fishes (Anguilliformes, Gadiformes and Salmoniformes) in Europe, Asia and North America[27]; R. (R.) gigi Fujita, 1928 in freshwater fishes of the families Bagridae, Salmonidae and Plecoglossidae from Lake Biwa system, Japan[11]; R.(R.) lutjani Olsen, 1952, a parasite of the marine fish Lutjanus analis (Cuvier) (Lutjanidae) in the Gulf of Mexico [32]; and R. (R.) mediterraneus Lèbre & Petter, 1983 in C. cuculus and C. obscurus (both Triglidae) from the Mediterranean Sea [15,16]. R. macrouri n. sp.…”

An annotated list of fish parasites (Isopoda, Copepoda, Monogenea, Digenea, Cestoda, Nematoda) collected from Snappers and Bream (Lutjanidae, Nemipteridae, Caesionidae) in New Caledonia confirms high parasite biodiversity on coral reef fish

“…Authors involved in the description and combination of taxa for Isopoda: [28,29,32,167,168]; for Copepoda: [36,37,155,169-172]; for Monopisthocotylea: [45,49,66,67,156,173-175]; for Digenea: [71-74,76,77,79,84,86,87,89,97,176-180]; for Trypanorhyncha: [99,181-188]; for Nematoda: [24,157-161,189,190]. …”

Raphidascaris (Ichthyascaris) arii sp. n. (Nematoda: Anisakidae), a new ascaridoid nematode from marine catfishes in the Gulf of Thailand

“…n., differs distinctly from R. fisheri and R. trichiuri in the presence of numerous small cuticular spines on the tail tip; from the former species also by the absence of a small bulge posterior to the anterolateral sockets on the lateral margins of the lips (see Bruce, 1990;Damin & Heqing, 2001). From R. etelidis and R. lophii (the latter considered a species inquirenda by Smith, 1984) in a markedly shorter body of the gravid female (10 -17 vs. 24 -27 and 23 -34 mm, respectively) and spicules (210 -333 vs. 345 -474 and 540 -690, respectively); from the former species also in less numerous pairs of preanal (21 -30 vs. 44 -49) and postanal (8 vs. 12 -13) papillae (Wu, 1949;Moravec & Justine, 2011). From R. vincentei it can be differentiated by the male tail tip with spines (vs. aspinose), less numerous pairs of postanal papillae (8 vs. 10 -11) and of all caudal papillae (30 -39 vs. 41 -51), and by less elongate lips with protruding inner lobes (vs. more elongate lips without markedly protruding inner lobes) on their anterior ends (Smith, 1984).…”