| Machadosentis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Acanthocephala |
| Class: | Eoacanthocephala |
| Order: | Gyracanthocephala |
| Family: | Quadrigyridae |
| Genus: | Machadosentis Noronha, 1992 |
| Species: | M. travassosi |
| Binomial name | |
| Machadosentis travassosi Noronha, 1992 | |
Machadosentis is a monotypic genus of acanthocephalans (thorny-headed or spiny-headed parasitic worms) containing a single species, Machadosentis travassosi, that infests animals.
The species was described by Noronha in 1992. The National Center for Biotechnology Information does not indicate that any phylogenetic analysis has been published on Machadosentis that would confirm its position as a unique order in the family Quadrigyridae. [1]
M. travassosi consists of a proboscis covered in hooks, a proboscis receptacle, and a long trunk.
The distribution of M. travassosi is determined by that of its hosts.
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 Machadosentis are ???. 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 are 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 Machadosentis. [4]
M. travassosi parasitizes animals. There are no reported cases of M. travassosi infesting humans in the English language medical literature. [3]
Promoniliformis is a monotypic genus of acanthocephalans containing a single species, Promoniliformis ovocristatus, that infests tenrecs in Madagascar. The genus PromoniliformisDollfus and Golvan, 1963 is characterized by possessing two distinct kinds of proboscis hooks. There is only one species in this genus.
Cucullanorhynchus is a monotypic genus of acanthocephalans. It contains a single species, Cucullanorhynchus constrictruncatus, which infests leopards in Vietnam.
Tchadorhynchus is a monotypic genus of acanthocephalans. It contains a single species, Tchadorhynchus quentini, which infests hyenas in Chad.
Multisentis is a monotypic genus of acanthocephalans. It contains a single species, Multisentis myrmecobius , parasite of the numbat from which it derives its species name. It was found in south-western Australia.
Floridosentis is a genus in Acanthocephala.
Tanaorhamphus is a monotypic genus of acanthocephalans containing a single species, Tanaorhamphus longirostris, that infests animals.
Golvanacanthus is a monotypic genus of acanthocephalans containing a single species, Golvanacanthus blennii, that infests animals.
Cathayacanthus is a genus in Acanthocephala.
Triaspiron is a monotypic genus of acanthocephalans containing a single species, Triaspiron aphanii.
Femogibbosus is a monotypic genus of acanthocephalans containing a single species, Femogibbosus assi, that infests animals.
Gracilisentis is a genus in Acanthocephala.
Pandosentis is a genus in Acanthocephala.
Wolffhugelia is a monotypic genus of acanthocephalans containing a single species, Wolffhugelia matercula, that infests animals.
Microsentis is a monotypic genus of worms belonging to the family Neoechinorhynchidae.
Dispiron is a genus in Acanthocephala belonging to the family Neoechinorhynchidae.
Hexaspiron is a genus in Acanthocephala belonging to the family Neoechinorhynchidae.
Gorytocephalus is a genus in Acanthocephala belonging to the family Neoechinorhynchidae.
Octospiniferoides is a genus in Acanthocephala belonging to the family Neoechinorhynchidae.
Acanthodelta is a genus of acanthocephalan.
Paraechinorhynchus is a monotypic genus of acanthocephalans containing a single species, Paraechinorhynchus kalriai, that infests the rohu.