Diplectanidae
| Diplectanidae | |
|---|---|
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| Pseudorhabdosynochus morrhua | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Class: | Monogenea |
| Subclass: | Monopisthocotylea |
| Family: | Diplectanidae Monticelli, 1903 |
The Diplectanidae is a family of monopisthocotylean monogeneans. They are all parasitic on the gills of fish (marine or freshwater). Diplectanids are small animals, generally ranging 1 mm in length. As parasites, they can be extremely numerous, up to several thousands on a single individual fish.
History
The Family Diplectanidae was proposed by the Italian parasitologist Monticelli in 1903 (as subfamily Diplectaninae). The status of the family and its components was later examined by various authors, including Johnston & Tiegs (1922), Price (1937), Bychowsky (1957), Yamaguti (1963) and Oliver (1987).
Morphology
_Fig3b_Haptor.png)
Haptor of Pseudorhabdosynochus jeanloui showing a squamodisc, hooks and bars. Scale: 40µm
Diplectanids are diagnosed by the combination of the three characters:
- Presence of accessory adhesive organs on dorsal and ventral part of the haptor; these are called squamodiscs when they are made up of rodlets and lamellodiscs when they include lamellae;
- In the haptor, three transversal bars (one ventral, two lateral (dorsal), connected to two pairs of hooks (one pair dorsal, one pair ventral)
- A germarium (or ovary) which is anterior to the testis and loops around the right intestinal caecum.
Included Genera
32 genera are recognized in WorMs
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References
- Bychowsky, B. E. (1957) Monogenetic Trematodes. Their systematic and phylogeny. Akad. Nauka. USSR. English translation by the American Institute of Biological Science, Washington. 509 pp.doi:10.5962/bhl.title.7475
- Johnston, T.H. & Tiegs, O.W. (1922) New Gyrodactyloid Trematodes from Australian fishes together with a reclassification of the Super-Family Gyrodactyloidea. Proceedings of the Linnean Society of New South Wales, 47, 83–131. PDF on BHL
- Monticelli, F.C. (1903) Per una nuova classificazione degli “Heterocotylea”. Monitore Zoologico Italiano, 14, 334–336.
- Oliver, G. (1987). Les Diplectanidae Bychowsky, 1957 (Monogenea, Monopisthocotylea, Dactylogyridea). Systématique. Biologie. Ontogénie. Écologie. Essai de phylogenèse. Thèse d'État, Académie de Montpellier, Université des Sciences et Techniques du Languedoc, France. doi:10.6084/m9.figshare.1295274
- Price, E. W. 1937: North American Monogenetic Trematodes. I. The superfamily Gyrodactyloidea. Journal of the Washington Academy of Sciences, 27, 146-164. PDF
- Yamaguti, S. (1963) Systema Helminthum IV. Monogenea and Aspidocotylea. London-New York, Interscience Publishers. 699 pp.
External links
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