Two new gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) from marine fishes off the northern coast of Australia
- 105 Downloads
Based on light and electron microscopical studies, two new gonad-infecting species of Philometra Costa, 1845 (Nematoda: Philometridae) are described from the ovary of marine perciform fishes off the northern coast of Australia (near Darwin): Philometra carangis n. sp. from the bluespotted trevally Caranx bucculentus Alleyne & Macleay (Carangidae) and P. carponotati n. sp. from the Spanish flag snapper Lutjanus carponotatus (Richardson) (Lutjanidae). Philometra carangis is mainly characterised by the length of the spicules (153–189 µm), the presence of a distinct dorsal protuberance consisting of two dorsolateral lamellar parts separated from each other by a smooth median field, a V-shaped mound on the male caudal extremity, a pair of large post-cloacal papillae and the body length of the males (3.22–4.15 mm). Philometra carponotati is distinguished from other congeneric species parasitising lutjanids by the length of the spicules and gubernaculum (225–252 and 99–117 µm, respectively), the absence of a dorsal protuberance on the distal lamellar part of the gubernaculum, the presence of a U-shaped mound on the male caudal extremity, a pair of large post-cloacal papillae and the body length of the male (3.74–4.31 mm). Besides the recently established Philometra zabidii Moravec & Diggles, 2014 (based on a single female), these two newly described nematodes are the only nominal gonad-infecting species of Philometra known to parasitise marine fishes in Australian waters.
KeywordsAnterior Extremity Cephalic Papilla South Australian Museum Caudal Projection Lateral Papilla
For their help with field collections, and comments on drafts of the manuscript, we thank Will Macbeth and Lachlan Barnes from Cardno. We also thank other field staff from Cardno and Quentin Allsop, Wayne Baldwin, and Chris Errity from NT Fisheries for assistance with field collections. The field sampling for this project was undertaken by DigsFish Services under contract to Cardno as part of the Nearshore Environmental Monitoring Program for the Ichthys LNG Project. Authors’ thanks are also due to the staff of the Laboratory of Electron Microscopy, Institute of Parasitology, Biology Centre of the AS CR, České Budějovice for their technical assistance, and to Blanka Škoríková of the same Institute for help with illustrations. This study was partly supported by the Czech Science Foundation (grant No. P505/12/G112) and the Institute of Parasitology, BC ASCR (institutional support RVO:60077344).
- Froese, R. & Pauly, D. (Eds.) (2014). FishBase. World Wide Web electronic publication. http://www.fishbase.org, version 05/2014.
- Hesp, S. A., Hobbs, R. P., & Potter, I. C. (2002). Infection of the gonads of Glaucosoma hebraicum by the nematode Philometra lateolabracis: occurrence and host response. Journal of Fish Biology, 60, 663–673.Google Scholar
- Ishii, S. (1931). [Parasites of fishes of Japan]. In: Iwanami. Biology, Part 18: pp. 179–207 (in Japanese).Google Scholar
- Ivashkin, V. M., Sobolev, A. A., & Khromova, L. A. (1971). [Camallanata of animals and man and the diseases caused by them.] Osnovy Nematodologii 22. Moscow: Nauka, 388 pp (In Russian).Google Scholar
- Johnston, T. H., & Mawson, P. (1940). Some nematodes parasitic in Australian freshwater fish. Transactions of the Royal Society of South Australia, 64, 340–352.Google Scholar
- Moravec, F., & Bakenhaster, M. (2012). New observations on philometrid nematodes (Philometridae) in marine fishes from the northern Gulf of Mexico and the Indian River Lagoon of Florida (USA), with first description of the male of Caranginema americanum. Journal of Parasitology, 98, 398–403.PubMedCrossRefGoogle Scholar
- Moravec, F., Bakenhaster, M., & Fajer-Ávila, J. (2014c). Three new gonad-infecting species of Philometra (Nematoda: Philometridae) parasitic in Lutjanus spp. (Lutjanidae) in the northern Gulf of Mexico off Florida, USA. Folia Parasitologica, 61, 353–368.Google Scholar
- Moravec, F., Diggles, B., Barnes, L., & Macbeth, W. (2014a). A new species of Buckleyella (Nematoda: Philometridae) from the abdominal cavity of the talang queenfish Scomberoides commersonnianus (Perciformes: Carangidae) of the northern coast of Australia. Helminthologia (in press).Google Scholar
- Moravec, F., Khosheghbal, M., & Pazooki, J. (2014b). Dichelyne (Dichelyne) spinigerus sp. nov. (Nematoda: Cucullanidae) from the marine fish Otolithes ruber (Sciaenidae) off Iran and first description of the male of Philometra otolithi Moravec et Manoharan, 2013 (Nematoda: Philometridae). Acta Parasitologica, 59, 229–237.PubMedCrossRefGoogle Scholar
- Moravec, F., & Manoharan, J. (2014a). Gonad-infecting species of Philometra (Nematoda: Philometridae) from groupers Epinephelus spp. (Osteichthyes: Serranidae) in the Bay of Bengal, India. Acta Parasitologica (in press).Google Scholar
- Moravec, F., & Manoharan, J. (2014b). Two new gonad-infecting species of Philometra (Nematoda: Philometridae) parasitic in Lutjanus spp. (Osteichthyes: Lutjanidae) in the Bay of Bengal, India. Parasitology Research (in press).Google Scholar
- Moravec, F., & Rohde, K. (1992). Three species of nematodes of the superfamily Dracunculoidea from Australian fishes. Acta Societatis Zoologicae Bohemoslovacae, 56, 187–195.Google Scholar
- Nakajima, K., & Egusa, S. (1969). [Philometroides seriolae (Ishii, 1931) Yamaguti, 1935, a large nematode infecting farmed yellowtail.] Fishery Pathology, 3, 115–117 (In Japanese).Google Scholar
- Parukhin, A. M. (1966). [Pseudophilometroides atropi gen. et sp. n., a new nematode of the family Dracunculidae Leiper, 1912.] Zoologicheskiy Zhurnal, 45, 766–767 (In Russian).Google Scholar
- Parukhin, A. M. (1971). [Nematodes from fishes of the Red Sea and Indian Ocean.] Volume “Voprosy ekologii ryb yuzhnikh morey“. Biologia Morya 23. Kiev: Naukova Dumka, pp. 177–193 (In Russian).Google Scholar
- Petter, A.-J., & Sey, O. (1997). Nematode parasites of marine fishes from Kuwait, with a description of Cucullanus trachinoti n. sp. from Trachinotus blochi. Zoosystema, 19, 35–59.Google Scholar
- Quiazon, K. M. A., Yoshinaga, T., & Ogawa, K. (2010). Taxonomical note on the redescription of Philometroides seriolae (Ishii, 1931) infecting Japanese amberjack (Seriola quinqueradiata Temminck & Schlegel, 1845) in Japan. Journal of Tropical Biology, 8, 29–34.Google Scholar