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Adlardia novaecaledoniae n. g., n. sp. (Digenea: Cryptogonimidae) from the fork-tailed threadfin bream Nemipterus furcosus (Val.) (Perciformes: Nemipteridae) off New Caledonia


Adlardia novaecaledoniae n. g., n. sp. (Digenea: Cryptogonimidae) is described from the fish Nemipterus furcosus (Val.) (Perciformes: Nemipteridae) from off New Caledonia (South Pacific). Adlardia n. g. is distinguished from all other cryptogonimid genera by the combination of an elongate body, the presence of oral spines, intestinal caeca that open via ani at the posterior end of the body, a highly lobed ovary, oblique testes that are located in the mid-hindbody, vitelline follicles that extend from midway between the testes and ovary to midway between the ovary and ventral sucker, and an excretory vesicle that bifurcates dorsal to the ovary and reunites immediately anterior to the pharynx. A. novaecaledoniae n. sp. is the only cryptogonimid that has been reported with an excretory vesicle that reunites anterior to the pharynx. Siphoderina elongata (Gu & Shen, 1979) Miller & Cribb, 2008 is transferred to Adlardia as A. elongata (Gu & Shen, 1979) n. comb. based on morphological and ecological (host group) agreement with A. novaecaledoniae. Bayesian inference analysis of LSU rDNA revealed that A. novaecaledoniae nested well within a clade containing cryptogonimid taxa known almost exclusively from haemulid and lutjanid fishes, suggesting that host-switching between teleosts of the Haemuloidea, Lutjanoidea and Sparoidea may have been common in the evolutionary history of this system.


Adlardia novaecaledoniae n. g., n. sp. (Digenea: Cryptogonimidae) est décrit du poisson Nemipterus furcosus (Val.) (Perciformes: Nemipteridae) de Nouvelle-Calédonie (Pacifique Sud). Adlardia n. g. est distingué de tous les autres genres de Cryptogonimidae par la combinaison d’un corps allongé, la présence d’épines orales, des caeca intestinaux qui s’ouvrent par des anus dans la partie postérieure du corps, un ovaire très lobé, des testicules obliques qui sont situés au centre de la partie postérieure du corps, des follicules vitellins qui s’étendent d’entre les testicules et l’ovaire jusqu’entre l’ovaire et la ventouse ventrale et une vésicule excrétrice qui bifurque dorsalement par rapport à l’ovaire et se réunit juste en avant du pharynx. A. novaecaledoniae n. sp. est le seul Cryptogonimidae qui a été décrit avec une vésicule excrétrice qui se réunit juste en avant du pharynx. Siphoderina elongata (Gu & Shen, 1979) Miller & Cribb, 2008 est transféré vers Adlardia comme A. elongata (Gu & Shen, 1979) n. comb. sur la base de ressemblances morphologiques et écologiques (groupe hôte) avec A. novaecaledoniae. Une analyse d’inférence bayésienne de l’ADNr LSU a révélé que A. novaecaledoniae trouvait sa place dans un clade comprenant des taxons de Cryptogonimidae connus presque exclusivement de poissons Haemulidae et de Lutjanidae, ce qui suggère que des changements d’hôtes entre des téléostéens Haemuloidea, Lutjanoidea et Sparoidea ont pu être communs dans l’histoire évolutive du système.

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The molecular sample processing was performed in the common laboratory of the “Plateforme du Vivant” (IRD, Nouméa) under the direction of Drs Clarisse Majorel and Philippe Jourand. We also wish to thank the many students and visiting scientists who participated in the fishing expeditions and parasitological survey of Nemipterus furcosus off New Caledonia.

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Correspondence to Terrence L. Miller.

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Miller, T.L., Bray, R.A., Goiran, C. et al. Adlardia novaecaledoniae n. g., n. sp. (Digenea: Cryptogonimidae) from the fork-tailed threadfin bream Nemipterus furcosus (Val.) (Perciformes: Nemipteridae) off New Caledonia. Syst Parasitol 73, 151–160 (2009).

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  • Ventral Sucker
  • Oral Sucker
  • Seminal Receptacle
  • Vitelline Follicle
  • Bayesian Inference Analysis