Simulium (Edwardsellum) rasyani n.sp., the Yemen species of the Simulium damnosum complex

Garms, R.; Kerner, M.; Meredith, S.E.

Tropical Medicine and Parasitology Official Organ of Deutsche Tropenmedizinische Gesellschaft and of Deutsche Gesellschaft für Technische Zusammenarbeit 39(3): 239-244


ISSN/ISBN: 0177-2392
PMID: 3194668
Document Number: 308839
Examination of the polytene chromosomes of the Yemen representative of the S. damnosum complex revealed hitherto unknown arrangements distinct enough to justify the description of this form as a new species, S. rasyani sp. nov. The newly recognized inversion II L-60.65 was always present and found to be homozygous in 62% and heterozygous in 38% of the 106 larvae which were examined. A short description is given of the morphology of the females, males, larvae and pupae. Populations from 5 permanent wadis (Kabir, Rasyan, Al Barh, Zabid and Surdud) in the Yemen Arab Republic were genetically and morphologically very uniform. The Yemen form of the Simulium damnosum complex has previously been shown to be anthropophilic and to be capable of harbouring developing filarial larvae indistinguishable from Onchocerca volvulus. From cytological study of blackflies collected in 1982 the authors consider the Yemen form to be a new species, and name it after the Wadi Rasyan where most of the material was collected.Carolyn A. Brown.

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