Oligacanthorhynchus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Acanthocephala
Class: Archiacanthocephala
Order: Oligacanthorhynchida
Family: Oligacanthorhynchidae
Genus: Oligacanthorhynchus
Travassos, 1915

Oligacanthorhynchus is a genus of parasitic worms belonging to the family Oligacanthorhynchidae.[1]

The genus Oligacanthorhynchus Travassos, 1915 contains numerous species. The trunk is cylindrical and smooth or irregularly ringed. The proboscis is generally globular being somewhat longer than it is wide and has stout hooks in left handed spiral rows, with their point obliquely cut and their root produced forwards. The proboscis receptacle consists of a thick inner wall i inserted into inside of proboscis which is shrinks along the ventral side, and a thinner outer wall inserted at base of neck. A series of intercommunicating spaces branching from two median main vessels and numerous longitudinal and circular anastomoses in the hypodermis form the lacunar system. Protonephridia are present. The lemnisci are filiform with a central canal and numerous nuclei. In the far posterior of the male, there are testes and eight cement glands used to temporarily close the posterior end of the female after copulation.[2][3][4] The eggs are almost spherical with shells that are radially striated. Hosts include birds with snakes being the intermediate hosts.[4]

Species

There are many species in the genus Oligacanthorhynchus.[lower-alpha 1]

  • Oligacanthorhynchus aenigma (Reichensperger, 1922)
  • Oligacanthorhynchus atratus (Meyer, 1931)
  • Oligacanthorhynchus bangalorensis (Pujatti, 1951)
  • Oligacanthorhynchus carinii (Travassos, 1917)

O. carinii was found infesting the southern three-banded armadillo (Tolypeutes matacus) in Paraguay.[5]

  • Oligacanthorhynchus cati (Gupta and Lata, 1967)
  • Oligacanthorhynchus circumplexus (Molin, 1858)
  • Oligacanthorhynchus citilli (Rudolphi, 1806)
  • Oligacanthorhynchus compressus (Rudolphi, 1802)
  • Oligacanthorhynchus decrescens (Meyer, 1931)
  • Oligacanthorhynchus erinacei (Rudolphi, 1793)
  • Oligacanthorhynchus hamatus (von Linstow, 1897)
  • Oligacanthorhynchus iheringi Travassos, 1917
  • Oligacanthorhynchus indicus Rengaraju and Das, 1981
  • Oligacanthorhynchus kamerunensis (Meyer, 1931)
  • Oligacanthorhynchus kamtschaticus Hokhlova, 1966
  • Oligacanthorhynchus lagenaeformis (Westrumb, 1821)
  • Oligacanthorhynchus lamasi (Freitas and Costa, 1964)
  • Oligacanthorhynchus lerouxi (Bisseru, 1956)
  • Oligacanthorhynchus major (Machado-Filho, 1963)
  • Oligacanthorhynchus manifestus (Leidy, 1851)
  • Oligacanthorhynchus mariemily (Tadros, 1969)
  • Oligacanthorhynchus microcephala (Rudolphi, 1819)
  • Oligacanthorhynchus minor Machado-Filho, 1964
  • Oligacanthorhynchus oligacanthus (Rudolphi, 1819)
  • Oligacanthorhynchus oti Machado-Filho, 1964
  • Oligacanthorhynchus pardalis (Westrumb, 1821)

The eggs are 58 um long and have an elongation ratio of 1.45.[6]

  • Oligacanthorhynchus ricinoides (Rudolphi, 1808)

O. ricinoides was found inside the body cavity of 0.68% of the African five-lined skink (Trachylepis quinquetaeniata reported as Mabuya quinquetaeniata) sampled in the Qena Governorate, Egypt. The worm is cylindrical and white. The wall of the body consists of a thin cuticle over a syncytical hypodermis. The proboscis is cylindrical and contains recurved sclerotized hooks. The trunk measures 1.9–3.1 mm long by 0.56–0.77 mm wide in the female and 1.9–2.99 mm. in length and 0.58–0.98 mm in width in the much smaller male. A series of intercommunicating spaces branching from two median main vessels and numerous longitudinal and circular anastomoses in the hypodermis form the lacunar system. The proboscis receptacle is inserted in the inner side of proboscis. The lemnisci are filiform with a central canal and numerous nuclei. The testes are located in the mid-region of the body and each measure 0.14–0.15 mm long by 0.10–0.11 mm wide.[4]

  • Oligacanthorhynchus shillongensis (Sen and Chauhan, 1972)
  • Oligacanthorhynchus spira (Diesing, 1851)
  • Oligacanthorhynchus taenioides (Diesing, 1851)
  • Oligacanthorhynchus thumbi Haffner, 1939
  • Oligacanthorhynchus tortuosa (Leidy, 1850)
  • Oligacanthorhynchus tumidus (Van Cleve, 1947)

Notes

  1. ↑ A binomial authority in parentheses indicates that the species was originally described in a genus other than the present genus.

References

  1. ↑ "Oligacanthorhynchus Travassos, 1915". www.gbif.org. Retrieved 6 April 2021.
  2. ↑ Bush, Albert O.; Fernández, Jacqueline C.; Esch, Gerald W.; Seed, J. Richard (2001). Parasitism : the diversity and ecology of animal parasites. Cambridge, UK New York, NY: Cambridge University Press. p. 203. ISBN 0-521-66278-8. OCLC 44131774.
  3. ↑ Kükenthal, W (2014). Gastrotricha and Gnathifera. Göttingen, Germany: Walter de Gruyter. p. 322. ISBN 978-3110274271.
  4. 1 2 3 Rabie, S. A., AbdEl-Latif, M. E. D. Z., Mohamed, N. I., & El-Hussin, O. F. A. Description of Some Acanthocephalan Species from Some Reptiles in Qena Governorate. url=http://www.aun.edu.eg/uploaded_full_txt/27206_full_txt.pdf
  5. ↑ Smales, Lesley R. (2007). "Oligacanthorhynchidae (Acanthocephala) from Mammals from Paraguay with the Description of a New Species of Neoncicola". Comparative Parasitology. 74 (2): 237–243. doi:10.1654/4271.1. S2CID 85226506.
  6. ↑ Pfenning, A. C. (2017). Egg morphology, dispersal, and transmission in acanthocephalan parasites: integrating phylogenetic and ecological approaches.Url=https://via.library.depaul.edu/cgi/viewcontent.cgi?article=1273&context=csh_etd


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.