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.

TITLE: Nouvelles mentions de nématodes Cucullanidae de poissons marins de Nouvelle-Calédonie, avec description de cinq nouvelles espèces de Cucullanus (Nematoda, Cucullanidae). 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.

Institut Systématique Évolution Biodiversité Muséum National d'Histoire Naturelle CNRS Sorbonne Université EPHE Université des Antilles rue Cuvier CP 51 75005 Paris France

Institute of Parasitology Biology Centre of the Czech Academy of Sciences Branišovská 31 370 05 České Budějovice Czech Republic

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