Gynandromorphism in Amblyomma cajennense and Rhipicephalus sanguineus (Acari: Ixodidae).
Abstract: During a survey of ticks on horses in November 2000, at the University of São Paulo farm in Pirassununga county, São Paulo, Brazil, 1 gynandromorph of Amblyomma cajennense was collected from a naturally infested horse. In another survey on dogs in March 2001, in the urban area of Monte Negro, Rondônia, Brazil, a gynandromorph of Rhipicephalus sanguineus was collected from a naturally infested dog. Both specimens are described and classified as perfect bipartite protogynanders.
Publication Date: 2002-08-29 PubMed ID: 12197141DOI: 10.1645/0022-3395(2002)088[0810:GIACAR]2.0.CO;2Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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This research focuses on the discovery of two gynandromorph specimens from two different species of ticks (Amblyomma cajennense and Rhipicephalus sanguineus) found on a horse and a dog during surveys in different parts of Brazil.
Overview of the Research
- This study was conducted during two different surveys of ticks on horses and dogs, respectively, in São Paulo and Rondônia, Brazil.
- During these surveys, one gynandromorph specimen each of two different tick species were identified: Amblyomma cajennense and Rhipicephalus sanguineus.
Gynandromorphism in Ticks
- The gynandromorph specimens collected in this study exhibit characteristics of both female and male ticks.
- Gynandromorphism in ticks is a relatively rare occurrence, making the discovery of both specimens significant.
Classification of the Gynandromorph Specimens
- Both gynandromorph specimens were classified as ‘perfect bipartite protogynanders’.
- A ‘perfect bipartite protogynander’ refers to an organism where the division between the male and female characteristics is clear and distinct.
- In these particular cases, it seems that one half of each tick exhibits female characteristics, while the other half exhibits male characteristics.
Significance of the Findings
- The discovery of gynandromorph specimens of these particular tick species provides valuable insights into the developmental biology of ticks.
- These findings also present rare instances of gynandromorphism in nature, which can contribute to our understanding of genetic and environmental influences on the development of sexual characteristics in ticks and potentially other species.
Cite This Article
APA
Labruna MB, Ribeiro AF, Cruz MV, Camargo LM, Camargo EP.
(2002).
Gynandromorphism in Amblyomma cajennense and Rhipicephalus sanguineus (Acari: Ixodidae).
J Parasitol, 88(4), 810-811.
https://doi.org/10.1645/0022-3395(2002)088[0810:GIACAR]2.0.CO;2 Publication
Researcher Affiliations
- Departamento de Medicina Veterinária Preventiva e Saúde Animal, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, SP, 05508-000, Brazil. labruna@usp.br
MeSH Terms
- Animals
- Brazil / epidemiology
- Dogs / parasitology
- Health Surveys
- Horses / parasitology
- Ixodidae / anatomy & histology
- Tick Infestations / epidemiology
- Tick Infestations / veterinary
Citations
This article has been cited 11 times.- Okely M, Bakkes DK, Chitimia-Dobler L. Morphological abnormalities in Hyalomma dromedarii and Hyalomma rufipes (Acari: Ixodidae) collected from dromedary camels (Camelus dromedarius) in Aswan, Egypt.. Exp Appl Acarol 2022 Oct;88(2):225-241.
- Kazim AR, Low VL, Houssaini J, Tappe D, Heo CC. Morphological abnormalities and multiple mitochondrial clades of Rhipicephalus haemaphysaloides (Ixodida: Ixodidae).. Exp Appl Acarol 2022 May;87(1):133-141.
- Laatamna A, Bakkes DK, Chitimia-Dobler L. Morphological anomalies in Rhipicephalus sanguineus s.s. (Acari: Ixodidae) collected from dogs in steppe and high plateaus regions, Algeria.. Exp Appl Acarol 2021 Apr;83(4):575-582.
- Buczek A, Bartosik K, Buczek AM, Buczek W, Kulina D. Abnormal Development of Hyalomma Marginatum Ticks (Acari: Ixodidae) Induced by Plant Cytotoxic Substances.. Toxins (Basel) 2019 Jul 26;11(8).
- Balinandi S, Mugisha L, Bbira J, Kabasa W, Nakayiki T, Bakkes DK, Lutwama JJ, Chitimia-Dobler L, Malmberg M. General and Local Morphological Anomalies in Amblyomma lepidum (Acari: Ixodidae) and Rhipicephalus decoloratus Infesting Cattle in Uganda.. J Med Entomol 2019 Apr 16;56(3):873-877.
- Chitimia-Dobler L, Bestehorn M, Bröker M, Borde J, Molcanyi T, Andersen NS, Pfeffer M, Dobler G. Morphological anomalies in Ixodes ricinus and Ixodes inopinatus collected from tick-borne encephalitis natural foci in Central Europe.. Exp Appl Acarol 2017 Aug;72(4):379-397.
- Ren Q, Chen Z, Luo J, Liu G, Guan G, Yin H, Luo J. Abnormal Development of Haemaphysalis qinghaiensis (Acari: Ixodidae).. J Insect Sci 2016;16(1).
- Prusinski MA, Mertins JW, Meehan LJ. Two Gynandromorphs of Ixodes scapularis (Acari: Ixodidae) from New York State.. J Med Entomol 2015 Mar;52(2):278-82.
- Kar S, Akyildiz G, Yilmazer N, Shaibi T, Gargili A, Vatansever Z. External morphological anomalies in ixodid ticks from Thrace, Turkey.. Exp Appl Acarol 2015 Nov;67(3):457-66.
- Chen Z, Li YQ, Ren QY, Luo J, Hu Y, Li K, Liu GY, Luo JX, Liu J, Yin H. Morphological Characteristics of Normal and Gynandromorphic Hyalomma asiaticum Schulze and Schlottke, 1930.. Korean J Parasitol 2015 Jun;53(3):361-4.
- Olmstead AW, LeBlanc GA. The environmental-endocrine basis of gynandromorphism (intersex) in a crustacean.. Int J Biol Sci 2006 Dec 5;3(2):77-84.
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