A redescription of Cylicocyclus adersi Boulenger, 1920 (Nematoda: Strongyloidea: Cyathostominae) parasitic in equids.
Abstract: As part of a revision of the systematics of the Cyathostominea of equids, we determined that the single type-specimen of Cylicocyclus adersi Boulenger, 1920 is missing and a modern description of this rare species parasitic in donkeys Equus asinus L. and zebras E. burchelli (Gray) and E. zebra L. is not available. Systematists at a workshop on the systematics of the Cyathostominea of horses, convened on August 11, 1997 in Sun City, South Africa, listed C. adersi as a species inquirenda . Herein, we provide a redescription of C. adersi and propose a neotype for the species. The distinctive shape of the buccal capsule of C. adersi , with a relatively tiny 'hoop-like thickening' at its base, a relatively small oesophageal funnel with a thick cuticular lining, and a short, but distinct, dorsal gutter readily distinguishes this species from other large species of Cylicocyclus Ihle, 1922.
Publication Date: 2004-10-13 PubMed ID: 15477753DOI: 10.1023/B:SYPA.0000044429.04246.3bGoogle Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
- Research Support
- U.S. Gov't
- Non-P.H.S.
Summary
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The study seeks to provide a detailed description of a rare parasitic species known as Cylicocyclus adersi, found in donkeys and zebras, using a newly proposed neotype after discovering that the original specimen is lost.
Research Background
- The research is a part of a broader initiative to revise the systematic study of Cyathostominea of equids, a group of parasites affecting horses.
- At the center of the study is the rare species known as Cylicocyclus adersi, which primarily infects donkeys (Equus asinus L.) and zebras (E. burchelli and E. zebra).
- The scientific community had labeled C. adersi as a species inquirenda, indicating its uncertain taxonomic position since the original type-specimen of C. adersi, as described by Boulenger in 1920, was found to be missing.
Redescription of Cylicocyclus adersi
- Researchers in this study, therefore, aim to give a new, modern description of the parasite, redefining its distinguishing characteristics and proposing a neotype. A neotype is a biological type specimen that replaces the original holotype when it is lost or destroyed.
- The unique features that help identify C. adersi from other species of the Cylicocyclus family include the distinctive shape of the parasite’s buccal capsule (the mouth part), the ‘hoop-like thickening’ at the base of the capsule, a relatively small oesophageal funnel with a thick cuticular lining, and a distinguishable but short dorsal gutter.
Significance of the Study
- Formally redescribing the species serves to clarify its taxonomic status and distinguish it from other large species in the same genus.
- This study benefits systematists studying the Cyathostominea of horses by providing additional understanding of the features of C. adersi, thereby contributing to the broader effort of revising the systematics of this group.
- The results could also potentially help in the development of more effective control measures for these parasitic species in equids.
Cite This Article
APA
Kharchenko VA, Lichtenfels JR, Pilitt PA, Krecek RC.
(2004).
A redescription of Cylicocyclus adersi Boulenger, 1920 (Nematoda: Strongyloidea: Cyathostominae) parasitic in equids.
Syst Parasitol, 59(2), 127-134.
https://doi.org/10.1023/B:SYPA.0000044429.04246.3b Publication
Researcher Affiliations
- I.I. Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine, vul. B. Khmelnyts'kogo, 15, Kiev, 01601, Ukraine.
MeSH Terms
- Animals
- Equidae / parasitology
- Female
- Male
- Microscopy, Interference
- South Africa
- Strongyloidea / anatomy & histology
- Strongyloidea / ultrastructure
- Zimbabwe
References
This article includes 6 references
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- Lichtenfels JR, Kharchenko VA, Krecek RC, Gibbons LM. An annotated checklist by genus and species of 93 species level names for 51 recognized species of small strongyles (Nematoda: Strongyloidea: Cyathostominea) of horses, asses and zebras of the world.. Vet Parasitol 1998 Sep;79(1):65-79.
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- Scialdo-Krecek RC, Reinecke RK, Biggs HC. Studies on the parasites of zebras. III Nematodes of the mountain zebra from the farm "Kelpie" and the Namib-Naukluft Park, South West Africa/Namibia.. Onderstepoort J Vet Res 1983 Dec;50(4):283-90.
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