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      New records of cucullanid nematodes from marine fishes off New Caledonia, with descriptions of five new species of Cucullanus (Nematoda, Cucullanidae) Translated title: Nouvelles mentions de nématodes Cucullanidae de poissons marins de Nouvelle-Calédonie, avec description de cinq nouvelles espèces de Cucullanus (Nematoda, Cucullanidae)

      research-article
      1 , * , ,   2
      Parasite
      EDP Sciences
      Nematode parasite, Seuratoidea, Mugiliformes, Perciformes, Tetraodontiformes, South Pacific

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          Abstract

          Recent examinations of cucullanid nematodes (Cucullanidae) from marine fishes off New Caledonia, collected in the years 2004–2009, revealed the presence of the following five new species of Cucullanus Müller, 1777, all parasitic in Perciformes: Cucullanus variolae n. sp. from Variola louti (type host) and V. albimarginata (both Serranidae); Cucullanus acutospiculatus n. sp. from Caesio cuning (Caesionidae); Cucullanus diagrammae n. sp. from Diagramma pictum (Haemulidae); Cucullanus parapercidis n. sp. from Parapercis xanthozona (type host) and P. hexophtalma (both Pinguipedidae); and Cucullanus petterae n. sp. from Epinephelus merra (type host) and E. fasciatus (both Serranidae). An additional congeneric species, Cucullanus bioccai Orecchia et Paggi, 1987 was recorded from Mugil cephalus (Mugilidae, Mugiliformes) (first record in the Pacific Ocean) and Cucullanus sp. (only female) was found in Arothron manilensis (Tetraodontidae, Tetraodontiformes). Furthermore, two known cucullanid species, Dichelyne ( Cucullanellus) branchiostegi (Yamaguti, 1941) in Branchiostegus wardi (Malacanthidae, Perciformes) (new host and geographical records) and Dichelyne ( Cucullanellus) bodiani Moravec et Justine, 2019 in Bodianus busellatus (new host) and B. perditio (both Labridae, Perciformes), were found; Dichelyne ( Cucullanellus) sp. (only females) coinfecting the latter host may represent an unknown species. Most species are described based on light and electron microscopical studies. The specimens described by Xu et al., 2017 as Cucullanus bourdini Petter et Le Bel, 1992 from Caesio xanthonota (Caesionidae) in the Taiwan Strait are considered to represent a new species, for which the name Cucullanus sinensis n. sp. is proposed.

          Translated abstract

          L’étude récente de nématodes Cucullanidae de poissons marins du large de la Nouvelle-Calédonie, collectés dans les années 2004-2009, a révélé la présence des cinq nouvelles espèces suivantes de Cucullanus Müller, 1777, toutes parasites de Perciformes : Cucullanus variolae n. sp. de Variola louti (hôte type) et V. albimarginata (tous deux Serranidae) ; Cucullanus acutospiculatus n. sp. de Caesio cuning (Caesionidae) ; Cucullanus diagrammae n. sp. de Diagramma pictum (Haemulidae) ; Cucullanus parapercidis n. sp. de Parapercis xanthozona (hôte type) et P. hexophtalma (tous deux Pinguipedidae) ; et Cucullanus petterae n. sp. d’ Epinephelus merra (type hôte) et E. fasciatus (tous deux Serranidae). Une autre espèce congénérique, Cucullanus bioccai Orecchia et Paggi, 1987 est signalée chez Mugil cephalus (Mugilidae, Mugiliformes) (première mention dans l’océan Pacifique) et Cucullanus sp. (seulement femelle) a été trouvé chez Arothron manilensis (Tetraodontidae, Tetraodontiformes). De plus, deux espèces de Cucullanidae connues, Dichelyne (Cucullanellus) branchiostegi (Yamaguti, 1941) chez Branchiostegus wardi (Malacanthidae, Perciformes) (nouvel hôte et nouvelle mention géographique) et Dichelyne (Cucullanellus) bodiani Moravec et Justine, 2019 chez Bodianus busellatus (nouvel hôte) et B. perditio (tous deux Labridae, Perciformes), ont été trouvées ; Dichelyne (Cucullanellus) sp. (seulement femelles) co-infectant ce dernier hôte peut représenter une espèce inconnue. La plupart des espèces sont décrites sur la base d’études au microscope optique et électronique. Les spécimens décrits par Xu et al., 2017 comme Cucullanus bourdini Petter et Le Bel, 1992 chez Caesio xanthonota (Caesionidae) dans le détroit de Taiwan sont considérés comme représentant une nouvelle espèce, pour laquelle le nom Cucullanus sinensis n. sp. est proposé.

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          Most cited references31

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          An annotated list of parasites (Isopoda, Copepoda, Monogenea, Digenea, Cestoda and Nematoda) collected in groupers (Serranidae, Epinephelinae) in New Caledonia emphasizes parasite biodiversity in coral reef fish.

          Abstract: Over a 7-year period, parasites have been collected from 28 species of groupers (Serranidae, Epinephelinae) in the waters off New Caledonia. Host-parasite and parasite-host lists are provided, with a total of 337 host-parasite combinations, including 146 parasite identifications at the species level. Results are included for isopods (5 species), copepods (19), monogeneans (56), digeneans (28), cestodes (12), and nematodes (12). When results are restricted to those 14 fish species for which more than five specimens were examined and to parasites identified at the species level, 109 host-parasite combinations were recorded, with 63 different species, of which monogeneans account for half (32 species), and an average of 4.5 parasite species per fish species. Digenean records were compared for 16 fish species shared with the study of Cribb et al. (2002); based on a total of 90 parasite records identified at the species level, New Caledonia has 17 new records and only seven species were already known from other locations. We hypothesize that the present results represent only a small part of the actual biodiversity, and we predict a biodiversity of 10 different parasite species and 30 host-parasite combinations per serranid. A comparison with a study on Heron Island (Queensland, Australia) by Lester and Sewell (1989) was attempted: of the four species of fish in common and in a total of 91 host-parasite combinations, only six parasites identified at the species level were shared. This suggests strongly that insufficient sampling impairs proper biogeographical or ecological comparisons. Probably only 3% of the parasite species of coral reef fish are already known in New Caledonia.
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            • Abstract: found
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            Cucullanid nematodes (Nematoda: Cucullanidae) from deep-sea marine fishes off New Caledonia, including Dichelyne etelidis n. sp.

            Three nematode species of the family Cucullanidae, intestinal parasites of marine perciform fishes, are reported from off New Caledonia: Cucullanus bourdini Petter & Le Bel, 1992 from the crimson jobfish Pristipomoides filamentosus (Valenciennes) and the goldflag jobfish Pristipomoides auricilla (Jordan, Evermann & Tanaka) (new host record) (both Lutjanidae); Dichelyne etelidis n. sp. from the deep-water red snapper Etelis carbunculus Cuvier (type-host) and the deep-water longtail red snapper Etelis coruscans Valenciennes (both Lutjanidae); and Dichelyne sp. (only one female) from the trumpet emperor Lethrinus miniatus (Forster) (Lethrinidae). Detailed light and electron microscopical studies revealed in C. bourdini some taxonomically important, previously unreported features, such as the location of the excretory pore, nature of the vulva and the size of fully-developed eggs. The new species, D. etelidis, is characterised mainly by the length of the spicules (462-748 μm), a single intestinal caecum, the location of the deirids and excretory pore, the arrangement of the genital papillae and the host group.
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              • Record: found
              • Abstract: found
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              Is Open Access

              Nematode parasites of four species of Carangoides (Osteichthyes: Carangidae) in New Caledonian waters, with a description of Philometra dispar n. sp. (Philometridae)

              Parasitological examination of marine perciform fishes belonging to four species of Carangoides, i.e. C. chrysophrys, C. dinema, C. fulvoguttatus and C. hedlandensis (Carangidae), from off New Caledonia revealed the presence of nematodes. The identification of carangids was confirmed by barcoding of the COI gene. The eight nematode species found were: Capillariidae gen. sp. (females), Cucullanus bulbosus (Lane, 1916) (male and females), Hysterothylacium sp. third-stage larvae, Raphidascaris (Ichthyascaris) sp. (female and larvae), Terranova sp. third-stage larvae, Philometra dispar n. sp. (male), Camallanus carangis Olsen, 1954 (females) and Johnstonmawsonia sp. (female). The new species P. dispar from the abdominal cavity of C. dinema is mainly characterised by the body length (5.14 mm), the lengths of markedly unequal spicules (163 and 96 μm) and gubernaculum (102 μm long) provided with a dorsal protuberance and a small, reflexed dorsal barb on its posterior portion. The finding of C. bulbosus represents the first record of this parasite a century after its discovery; the first study of this species by scanning electron microscopy (SEM) enabled detailed redescription. The finding of Johnstonmawsonia sp. in C. fulvoguttatus is the first record of a rhabdochonid nematode from a host belonging to the Carangidae family. Johnstonmawsonia africana Moravec & Puylaert, 1970 and J. campanae Puylaert, 1973 are transferred to Prosungulonema Roytman, 1963 as P. africanum (Moravec & Puylaert, 1970) comb. n. and P. campanae (Puylaert, 1973) n. comb.
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                Author and article information

                Journal
                parasite
                https://www.parasite-journal.org
                Parasite
                Parasite
                EDP Sciences
                1776-1042
                19 May 2020
                2020
                19 May 2020
                19 May 2020
                : 27
                : ( publisher-idID: parasite/2020/01 )
                : 37
                Affiliations
                [1 ] Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, , Branišovská 31, 370 05 České Budějovice, Czech Republic,
                [2 ] Institut Systématique, Évolution, Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, rue Cuvier, , CP 51, 75005 Paris, France,
                Author notes
                [* ]Corresponding author: moravec@ 123456paru.cas.cz
                Author information
                https://orcid.org/0000-0003-1086-1181
                https://orcid.org/0000-0002-7155-4540
                Article
                parasite200044
                10.1051/parasite/2020030
                22deec5f-d26f-4ada-9443-12c2bde189f1
                © F. Moravec & J.-L. Justine, published by EDP Sciences, 2020

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 19 March 2020
                : 27 April 2020
                Page count
                Figures: 17, Tables: 0, Equations: 0, References: 28, Pages: 23
                Categories
                Research Article
                Custom metadata
                Parasite 27, 37 (2020)
                2020
                2020
                2020

                Parasitology,Life sciences
                Nematode parasite,Seuratoidea,Mugiliformes,Perciformes,Tetraodontiformes,South Pacific

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