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. 2020;27:37.
doi: 10.1051/parasite/2020030. Epub 2020 May 19.

New Records of Cucullanid Nematodes From Marine Fishes Off New Caledonia, With Descriptions of Five New Species of Cucullanus (Nematoda, Cucullanidae)

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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)

František Moravec et al. Parasite. .
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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.

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.

Keywords: Mugiliformes; Nematode parasite; Perciformes; Seuratoidea; South Pacific; Tetraodontiformes.

Figures

Figure 1
Figure 1
Cucullanus variolae n. sp. from Variola spp. (A, B) Anterior end of male, dorsoventral and lateral views, respectively; (C) pseudobuccal capsule of male, lateral view; (D) anterior end of female, lateral view; (E) cephalic end, apical view; (F) tail of female, lateral view; (G) posterior end of male, lateral view; (H) tail of male, lateral view; (I) egg; (J) vulva, lateral view; (K) tail of male, ventral view. (A)–(C), (G), (H) and (K) from V. louti; (D)–(F), (I) and (J) from V. albimarginata.
Figure 1
Figure 1
Cucullanus variolae n. sp. from Variola spp. (A, B) Anterior end of male, dorsoventral and lateral views, respectively; (C) pseudobuccal capsule of male, lateral view; (D) anterior end of female, lateral view; (E) cephalic end, apical view; (F) tail of female, lateral view; (G) posterior end of male, lateral view; (H) tail of male, lateral view; (I) egg; (J) vulva, lateral view; (K) tail of male, ventral view. (A)–(C), (G), (H) and (K) from V. louti; (D)–(F), (I) and (J) from V. albimarginata.
Figure 2
Figure 2
Cucullanus variolae n. sp., scanning electron micrographs of male from V. louti. (A, B) Cephalic end, sublateral and subapical views, respectively; (C) posterior end of body, lateral view; (D) tail, lateral view (arrow indicates phasmid); (E) tail, ventral view; (F) median precloacal elevation, ventral view. (a) Amphid; (b) cephalic papilla; (c) cloaca; (d) ventral sucker; (e) median precloacal elevation.
Figure 2
Figure 2
Cucullanus variolae n. sp., scanning electron micrographs of male from V. louti. (A, B) Cephalic end, sublateral and subapical views, respectively; (C) posterior end of body, lateral view; (D) tail, lateral view (arrow indicates phasmid); (E) tail, ventral view; (F) median precloacal elevation, ventral view. (a) Amphid; (b) cephalic papilla; (c) cloaca; (d) ventral sucker; (e) median precloacal elevation.
Figure 3
Figure 3
Cucullanus variolae n. sp., scanning electron micrographs of female from V. albimarginata. (A, B) Cephalic end, lateral and apical views, respectively; (C) tail of juvenile specimen, lateral view; (D) deirid. (a) Amphid; (b) cephalic papilla; (c) anus; (d) phasmid.
Figure 3
Figure 3
Cucullanus variolae n. sp., scanning electron micrographs of female from V. albimarginata. (A, B) Cephalic end, lateral and apical views, respectively; (C) tail of juvenile specimen, lateral view; (D) deirid. (a) Amphid; (b) cephalic papilla; (c) anus; (d) phasmid.
Figure 4
Figure 4
Cucullanus acutospiculatus n. sp. from Caesio cuning. (A, B) Anterior end of male, lateral views (two different specimens); (C) cephalic end, apical view; (D) tail of juvenile female, lateral view; (E) tail of male, lateral view; (F) distal end of spicule, lateral view; (G) posterior end of male, lateral view; (H) tail of male, ventral view.
Figure 4
Figure 4
Cucullanus acutospiculatus n. sp. from Caesio cuning. (A, B) Anterior end of male, lateral views (two different specimens); (C) cephalic end, apical view; (D) tail of juvenile female, lateral view; (E) tail of male, lateral view; (F) distal end of spicule, lateral view; (G) posterior end of male, lateral view; (H) tail of male, ventral view.
Figure 5
Figure 5
Cucullanus acutospiculatus n. sp. from Caesio cuning, scanning electron micrographs of male. (A)–(C) Cephalic end, lateral, apical and dorsoventral views, respectively; (D) tail, lateral view (arrow indicates phasmid); (E) posterior end of body, lateral view; (F) cloacal region, ventral view; (G) median precloacal elevation, ventral view; (H) deirid. (a) Amphid; (b) cephalic papilla; (c) cloaca; (d) ventral sucker; (e) median precloacal elevation; (s) spicule.
Figure 5
Figure 5
Cucullanus acutospiculatus n. sp. from Caesio cuning, scanning electron micrographs of male. (A)–(C) Cephalic end, lateral, apical and dorsoventral views, respectively; (D) tail, lateral view (arrow indicates phasmid); (E) posterior end of body, lateral view; (F) cloacal region, ventral view; (G) median precloacal elevation, ventral view; (H) deirid. (a) Amphid; (b) cephalic papilla; (c) cloaca; (d) ventral sucker; (e) median precloacal elevation; (s) spicule.
Figure 6
Figure 6
Cucullanus acutospiculatus n. sp. from Caesio cuning, scanning electron micrographs of male tail (another specimen). (A) Lateral view (arrow indicates phasmid); (B) ventral view. (c) Cloaca; (e) median precloacal elevation.
Figure 6
Figure 6
Cucullanus acutospiculatus n. sp. from Caesio cuning, scanning electron micrographs of male tail (another specimen). (A) Lateral view (arrow indicates phasmid); (B) ventral view. (c) Cloaca; (e) median precloacal elevation.
Figure 7
Figure 7
Cucullanus diagrammae n. sp. from Diagramma pictum. (A, B) Anterior end of male, lateral views (two different specimens); (C) cephalic end, apical view; (D) posterior end of male, lateral view; (E) tail of female, lateral view; (F) egg.
Figure 7
Figure 7
Cucullanus diagrammae n. sp. from Diagramma pictum. (A, B) Anterior end of male, lateral views (two different specimens); (C) cephalic end, apical view; (D) posterior end of male, lateral view; (E) tail of female, lateral view; (F) egg.
Figure 8
Figure 8
Cucullanus diagrammae n. sp. from Diagramma pictum, scanning electron micrographs of male. (A, B) Cephalic end, sublateral and apical views, respectively; (C) cephalic end, dorsoventral view; (D) detail of peribuccal teeth; (E) anterior end of body, dorsoventral view (arrow indicates deirid); (F) deirid. (a) Amphid; (b) cephalic papilla.
Figure 8
Figure 8
Cucullanus diagrammae n. sp. from Diagramma pictum, scanning electron micrographs of male. (A, B) Cephalic end, sublateral and apical views, respectively; (C) cephalic end, dorsoventral view; (D) detail of peribuccal teeth; (E) anterior end of body, dorsoventral view (arrow indicates deirid); (F) deirid. (a) Amphid; (b) cephalic papilla.
Figure 9
Figure 9
Cucullanus parapercidis n. sp. from Parapercis spp. (A) Anterior end of male, lateral view; (B) anterior end of female, dorsoventral view; (C) cephalic end, apical view; (D) egg; (E) tail of male, lateral view; (F) posterior end of male, lateral view; (G) tail of female, lateral view; (H) tail of male, ventral view. (A), (C), (E), (F) and (H) from P. xanthozona; (B), (D) and (G) from P. hexophtalma.
Figure 9
Figure 9
Cucullanus parapercidis n. sp. from Parapercis spp. (A) Anterior end of male, lateral view; (B) anterior end of female, dorsoventral view; (C) cephalic end, apical view; (D) egg; (E) tail of male, lateral view; (F) posterior end of male, lateral view; (G) tail of female, lateral view; (H) tail of male, ventral view. (A), (C), (E), (F) and (H) from P. xanthozona; (B), (D) and (G) from P. hexophtalma.
Figure 10
Figure 10
Cucullanus parapercidis n. sp., scanning electron micrographs of male from Parapercis xanthozona. (A) Cephalic end, apical view; (B) posterior end of body, lateral view; (C, D) tail, lateral and ventral views, respectively; (E, F) region of cloaca, lateral and ventral views, respectively. (a) Amphid; (b) cephalic papilla; (c) ventral sucker; (d) cloacal aperture; (e) precloacal median elevation; (f) outgrowth of anterior cloacal lip; (g) posterior cloacal lip with apical outgrowth.
Figure 10
Figure 10
Cucullanus parapercidis n. sp., scanning electron micrographs of male from Parapercis xanthozona. (A) Cephalic end, apical view; (B) posterior end of body, lateral view; (C, D) tail, lateral and ventral views, respectively; (E, F) region of cloaca, lateral and ventral views, respectively. (a) Amphid; (b) cephalic papilla; (c) ventral sucker; (d) cloacal aperture; (e) precloacal median elevation; (f) outgrowth of anterior cloacal lip; (g) posterior cloacal lip with apical outgrowth.
Figure 11
Figure 11
Cucullanus parapercidis n. sp., scanning electron micrographs of gravid female from Parapercis hexophtalma. (A, B) Cephalic end, sublateral and apical views, respectively; (C) tail, ventral view (arrows indicate phasmids); (D) deirid. (a) Amphid; (b) cephalic papilla; (i) anus.
Figure 11
Figure 11
Cucullanus parapercidis n. sp., scanning electron micrographs of gravid female from Parapercis hexophtalma. (A, B) Cephalic end, sublateral and apical views, respectively; (C) tail, ventral view (arrows indicate phasmids); (D) deirid. (a) Amphid; (b) cephalic papilla; (i) anus.
Figure 12
Figure 12
Cucullanus petterae n. sp. from Epinephelus spp. (A) Anterior end of male, lateral view; (B) anterior end of female, lateral view; (C) pseudobuccal capsule of female, lateral view; (D) cephalic end of female, apical view; (E) tail of male, ventral view; (F) tail of female, lateral view; (G) tail of male, lateral view; (H) posterior end of male, lateral view. (A), (E), (G) and (H) from Epinephelus merra; (B), (C), (D) and (F) from Epinephelus fasciatus.
Figure 12
Figure 12
Cucullanus petterae n. sp. from Epinephelus spp. (A) Anterior end of male, lateral view; (B) anterior end of female, lateral view; (C) pseudobuccal capsule of female, lateral view; (D) cephalic end of female, apical view; (E) tail of male, ventral view; (F) tail of female, lateral view; (G) tail of male, lateral view; (H) posterior end of male, lateral view. (A), (E), (G) and (H) from Epinephelus merra; (B), (C), (D) and (F) from Epinephelus fasciatus.
Figure 13
Figure 13
Cucullanus petterae n. sp. n., scanning electron micrographs of male from Epinephelus merra. (A) Anterior end, lateral view (arrow indicates deirid); (B) posterior end, ventral view; (C) tail, ventral view; (D) tail, lateral view; (E, F) region of cloaca, ventral and lateral views, respectively; (G) cloaca, sublateral view. (c) Ventral sucker; (d) cloacal aperture; (e) precloacal median elevation containing two small papillae; (f) outgrowth of anterior cloacal lip; (g) outgrowth of posterior cloacal lip.
Figure 13
Figure 13
Cucullanus petterae n. sp. n., scanning electron micrographs of male from Epinephelus merra. (A) Anterior end, lateral view (arrow indicates deirid); (B) posterior end, ventral view; (C) tail, ventral view; (D) tail, lateral view; (E, F) region of cloaca, ventral and lateral views, respectively; (G) cloaca, sublateral view. (c) Ventral sucker; (d) cloacal aperture; (e) precloacal median elevation containing two small papillae; (f) outgrowth of anterior cloacal lip; (g) outgrowth of posterior cloacal lip.
Figure 14
Figure 14
Cucullanus petterae n. sp., scanning electron micrographs of nongravid female from Epinephelus fasciatus. (A, B) Cephalic end, sublateral and apical views, respectively; (C) cephalic end, dorsoventral view; (D) deirid. (a) Amphid; (b) cephalic papilla.
Figure 14
Figure 14
Cucullanus petterae n. sp., scanning electron micrographs of nongravid female from Epinephelus fasciatus. (A, B) Cephalic end, sublateral and apical views, respectively; (C) cephalic end, dorsoventral view; (D) deirid. (a) Amphid; (b) cephalic papilla.
Figure 15
Figure 15
Cucullanus bioccai Orecchia et Paggi, 1987 from Mugil cephalus, female. (A) Anterior end of gravid specimen, ventral view; (B) anterior end of nongravid specimen, lateral view; (C, D) tail of gravid and nongravid specimens, respectively, lateral views; (E) egg.
Figure 15
Figure 15
Cucullanus bioccai Orecchia et Paggi, 1987 from Mugil cephalus, female. (A) Anterior end of gravid specimen, ventral view; (B) anterior end of nongravid specimen, lateral view; (C, D) tail of gravid and nongravid specimens, respectively, lateral views; (E) egg.
Figure 16
Figure 16
Dichelyne (Cucullanellus) branchiostegi (Yamaguti, 1941) from Branchiostegus wardi, gravid female. (A) Anterior end of body, lateral view; (B) cephalic end, lateral view; (C) tail, lateral view; (D) egg.
Figure 16
Figure 16
Dichelyne (Cucullanellus) branchiostegi (Yamaguti, 1941) from Branchiostegus wardi, gravid female. (A) Anterior end of body, lateral view; (B) cephalic end, lateral view; (C) tail, lateral view; (D) egg.
Figure 17
Figure 17
Dichelyne (Cucullanellus) sp. from Bodianus perditio, gravid female. (A) Anterior end of body, lateral view; (B) tail, lateral view; (C) egg.
Figure 17
Figure 17
Dichelyne (Cucullanellus) sp. from Bodianus perditio, gravid female. (A) Anterior end of body, lateral view; (B) tail, lateral view; (C) egg.

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