Neorhadinorhynchus is a genus in Acanthocephala (thorny-headed worms, also known as spiny-headed worms).
| Neorhadinorhynchus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Acanthocephala |
| Class: | Palaeacanthocephala |
| Order: | Echinorhynchida |
| Family: | Cavisomidae |
| Genus: | Neorhadinorhynchus Yamaguti, 1939 |
| Type species | |
| Neorhadinorhynchus | |
Taxonomy
editThe genus was described by Yamaguti in 1939. Phylogenetic analysis has been published on Neorhadinorhynchus nudus.[1]
Description
editNeorhadinorhynchus species consist of a proboscis covered in hooks and a trunk.
Species
editThe genus Neorhadinorhynchus contains seven species.[2]
- Neorhadinorhynchus aspinosus (Fukui and Morisita, 1937)
- Neorhadinorhynchus atlanticus Gaevskaja & Nigmatulin, 1977
- Neorhadinorhynchus atypicalis Amin & Ha, 2011
- Neorhadinorhynchus macrospinosus Amin & Nahhas, 1994[2]
- Neorhadinorhynchus madagascariensis Golvan, 1969
- Neorhadinorhynchus myctophumi Mordvilkova, 1988
- Neorhadinorhynchus nudus (Harada, 1938)
Distribution
editThe distribution of Neorhadinorhynchus is determined by that of its hosts.
Hosts
edit
The life cycle of an acanthocephalan consists of three stages beginning when an infective acanthor (development of an egg) is released from the intestines of the definitive host and then ingested by an arthropod, the intermediate host. Although the intermediate hosts of Neorhadinorhynchus are arthropods. When the acanthor molts, the second stage called the acanthella begins. This stage involves penetrating the wall of the mesenteron or the intestine of the intermediate host and growing. The final stage is the infective cystacanth which is the larval or juvenile state of an Acanthocephalan, differing from the adult only in size and stage of sexual development. The cystacanths within the intermediate hosts are consumed by the definitive host, usually attaching to the walls of the intestines, and as adults they reproduce sexually in the intestines. The acanthor is passed in the feces of the definitive host and the cycle repeats. There may be paratenic hosts (hosts where parasites infest but do not undergo larval development or sexual reproduction) for Neorhadinorhynchus.[5]
Neorhadinorhynchus parasitizes fish. There are no reported cases of Neorhadinorhynchus infesting humans in the English language medical literature.[4]
- Hosts for Neorhadinorhynchus species
-
The frigate tuna (Auxis thazard) is a host for Neorhadinorhynchus nudus.
Notes
editReferences
edit- ^ Amin, O. M., Chaudhary, A., Sharifdini, M., & Singh, H. S. (2024). First molecular description of Neorhadinorhynchus nudus (Acanthocephala: Cavisomidae) from fish in the pacific coast of Vietnam, with notes on biogeography. Systematic Parasitology, 101(2), 23.
- ^ a b Amin OM, Nahhas FM. Acanthocephala of marine fishes off Fiji Islands, with descriptions of Filisoma longcementglandatus n. sp., Neorhadinorhynchus macrospinosus n. sp. (Cavisomidae), and gravid females of Rhadinorhynchus johnstoni (Rhadinorhynchidae); and keys to species of the genera Filisoma and Neorhadinorhynchus. J Parasitol. 1994 Oct;80(5):768-74. PMID 7931911.
- ^ CDC’s Division of Parasitic Diseases and Malaria (11 April 2019). "Acanthocephaliasis". www.cdc.gov. Center for Disease Control. Archived from the original on 8 June 2023. Retrieved 17 July 2023.
- ^ a b Mathison, BA; et al. (2021). "Human Acanthocephaliasis: a Thorn in the Side of Parasite Diagnostics". J Clin Microbiol. 59 (11): e02691-20. doi:10.1128/JCM.02691-20. PMC 8525584. PMID 34076470.
- ^ Schmidt, G.D. (1985). "Development and life cycles". In Crompton, D.W.T.; Nickol, B.B. (eds.). Biology of the Acanthocephala (PDF). Cambridge: Cambridge Univ. Press. pp. 273–305. Archived (PDF) from the original on 22 July 2023. Retrieved 16 July 2023.
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