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Cytotaxonomy, morphology and molecular systematics of the Bioko form of Simulium yahense (Diptera: Simuliidae)

Published online by Cambridge University Press:  09 March 2007

R.J. Post ,
P.K. Flook ,
A.L. Millest ,
R.A. Cheke ,
P.J. McCall ,
M.D. Wilson ,
M. Mustapha ,
S. Somiari ,
J.B. Davies  and
R.A. Mank
...Show all authors
R.J. Post*
Affiliation:
Department of Entomology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
P.K. Flook
Affiliation:
Division of Parasite and Vector Biology, Liverpool School of Tropical Medicine, UK
A.L. Millest
Affiliation:
Department of Biological Sciences, University of Salford, UK
R.A. Cheke
Affiliation:
Natural Resources Institute, University of Greenwich, ChathamUK
P.J. McCall
Affiliation:
Division of Parasite and Vector Biology, Liverpool School of Tropical Medicine, UK
M.D. Wilson
Affiliation:
Noguchi Memorial Institute for Medical Research, University of GhanaGhana
M. Mustapha
Affiliation:
Department of Entomology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
S. Somiari
Affiliation:
Windber Research Institute, Windber, USA
J.B. Davies
Affiliation:
Division of Parasite and Vector Biology, Liverpool School of Tropical Medicine, UK
R.A. Mank
Affiliation:
Animal Taxonomy Section, Wageningen University, The Netherlands
P. Geenen
Affiliation:
Animal Taxonomy Section, Wageningen University, The Netherlands
P. Enyong
Affiliation:
Medical Research Station, Kumba, Cameroon
A. Sima
Affiliation:
Onchocerciasis Control Programme, Ministry of Health, Malabo, Equatorial Guinea
J. Mas
Affiliation:
Onchocerciasis Control Programme, Spanish International Cooperation Agency, Malabo, Equatorial Guinea
*
*Fax: +44 (0)20 7942 5229 E-mail: R.Post@nhm.ac.uk.
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Abstract

Cytotaxonomic analysis of the polytene chromosomes from larvae of the Simulium damnosum Theobald complex from the island of Bioko in Equatorial Guinea is reported, and a new endemic cytoform is described. Chromosomally this cytoform is close to both S. squamosum (Enderlein) and S. yahense Vajime & Dunbar, but is not identical to either. However, it is morphologically and enzymatically identical to S. yahense. The Bioko form was also found to differ from other cytoforms of the S. damnosum complex in West Africa in the copy number or RFLP pattern of several different repetitive DNA sequences. It is clear that the Bioko form is genetically distinct from other populations of the S. damnosum complex, and whilst it is closest to S. yahense, it shows features that suggest a high degree of geographical and genetic isolation. Such isolation is an important consideration in the assessment of the potential for onchocerciasis vector eradication on Bioko.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 93 , Issue 2 , April 2003 , pp. 145 - 157
Copyright
Copyright © Cambridge University Press 2003

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