A new gonad-infecting species of Philometra, P. barnesi sp. n. (Nematoda: Philometridae), from the marine fish Pomadasys argenteus (Haemulidae) off the northern coast of Australia
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A new nematode species, Philometra barnesi sp. n. (Philometridae), is described from the ovary of the marine teleost Pomadasys argenteus (Fosskål) (Haemulidae) off the northern coast of Australia (near Darwin). The new species is characterized by short subequal spicules (84 and 87 μm long), a gubernaculum without a dorsal protuberance at its distal tip, the structure of male anterior and posterior body ends, the body lengths of males (1.67 mm) and gravid females (320–597 mm) and the structure of the oesophagus and caudal end of gravid females. Philometra barnesi is the sixth nominal gonad-infecting species of this genus recorded from marine fishes in Australian waters and the third species of philometrids described from fishes of the family Haemulidae.
KeywordsAustralia Dracunculoidea Marine fish Nematode parasite
For their help with field collections, we thank Lachlan Barnes and other field staff from Cardno, Environmental Services, as well as Quentin Allsop, Wayne Baldwin, Chris Errity and other field staff from NT Fisheries. The field collections for this project were undertaken by DigsFish Services as part of environmental monitoring for Ichthys Gas Field Development Project. The authors’ thanks are also due to the staff of the Laboratory of Electron Microscopy, Institute of Parasitology, Biology Centre of the CAS, České Budějovice, for their technical assistance, and to Blanka Škoríková of the same Institute for help with the illustrations. This study was partly supported by the Czech Science Foundation (Grant No. P505/12G112) and by institutional support (RVO:60077344, Institute of Parasitology, BC CAS).
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