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TWO BILATERAL GYNANDROMORPHS IN THE CALYPTRATAE (DIPTERA): HYDROTAEA METEORICA (MUSCIDAE) AND SIPHONA HOKKAIDENSIS (TACHINIDAE)

Published online by Cambridge University Press:  31 May 2012

J. E. O'hara
J. E. O'hara
Affiliation:
Department of Entomology, University of Alberta, Edmonton, Alberta T6G 2E3
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Abstract

Two bilateral gynandromorphs, specimens of Hydrotaea meteorica (Linn.) (Muscidae) and Siphona hokkaidensis Mesnil (Tachinidae), are described and illustrated. Circumversion of male genital parts is thought to have been prevented by adjacent female genital elements. Study of essentially unrotated male genital halves of these specimens suggests that asymmetry of male sternite 6 in schizophorans results from asymmetrical development (as advocated by Emmert (1972) and Griffiths (1972)) and not as a consequence of slight rotation during circumversion (as advocated by Crampton (1942) and McAlpine (1981)). From study of genital fusion of male and female sclerites across midline, it is further suggested that sternite 6 + 7 in the above species is derived primarily from sternite 6, not from sternites 6 plus 7 as described in Calliphora vicina R.D. by Emmert (1972).

Résumé

Deux gynandromorphes bilatéraux, des spécimens d'Hydrotaea meteorica (Linn.) (Muscidae) et de Siphona hokkaidensis Mesnil (Tachinidae), sont décrits et illustrés. La circonversion des pièces génitales mâles semble avoir été empêchée par les parties génitales femelles adjacentes. L'étude des moitiés génitales mâles non pivotées de ces spécimens indique que l'asymétrie du sternite 6 mâle chez les schizophores résulte d'un développement asymétrique (tel que proposé par Emmert (1972) et Griffiths (1972)), et non pas d'une rotation légère durant la circonversion (tel que soutenu par Crampton (1942) et McAlpine (1981)). A partir de l'étude de la fusion génitale des sclérites mâles et femelles de part et d'autre de la ligne médiane, il est par ailleurs proposé que le sternite 6 + 7 chez les espèces ci-dessus, est dérivé principalemnt du sternite 6, et non des sternites 6 et 7 tel que décrit pour Calliphora vicina R.D. par Emmert (1972).

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 4 , April 1983 , pp. 379 - 386
Copyright
Copyright © Entomological Society of Canada 1983

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References

Brust, R. A. 1966. Gynandromorphs and intersexes in mosquitoes (Diptera: Culicidae). Can. J. Zool. 44: 911–921.CrossRefGoogle ScholarPubMed
Crampton, G. C. 1942. The external morphology of the Diptera. In Guide to the insects of Connecticut. Part VI. The Diptera or true flies of Connecticut. First Fascicle. Bull. Conn. St. geol. nat. Hist. Surv. 64: 10–165.Google Scholar
Dübendorfer, A. 1971. Untersuchungen zum Anlageplan und Determinationszustand der weiblichen Genital-und Analprimordien von Musca domestica L. Wilhelm Roux Arch. 168: 142–168.CrossRefGoogle Scholar
Emmert, W. 1972. Entwicklungsleistungen abdominaler Imaginalscheiben von Calliphora erythrocephala (Insecta, Diptera). Experimentelle Untersuchungen zur Morphologie des Abdomens. Wilhelm Roux Arch. 169: 87–133.CrossRefGoogle Scholar
Griffiths, G. C. D. 1972. The phylogenetic classification of Diptera Cyclorrhapha with special reference to the structure of the male postabdomen. Junk, The Hague. 340 pp.Google Scholar
Griffiths, G. C. D. 1981. Book review: Manual of Nearctic Diptera. Volume 1. Bull. ent. Soc. Can. 13: 49–55.Google Scholar
Herting, B. 1957. Das weibliche Postabdomen der calyptraten Fliegen (Diptera) und sein Merkmalswert für die Systematik der Gruppe. Z. Morph. Ökol. Tiere 45: 429–461.CrossRefGoogle Scholar
Horsfall, W. R. and Ronquillo, M. C.. 1970. Genesis of the reproductive system of mosquitoes. II. Male of Aedes stimulans (Walker). J. Morph. 131: 329–357.CrossRefGoogle Scholar
Huckett, H. C. 1954. A review of the North American species belonging to the genus Hydrotaea Robineau-Desvoidy (Diptera, Muscidae). Ann. ent. Soc. Am. 47: 316–342.CrossRefGoogle Scholar
Kurahashi, H. 1977. A gynandromorph in Parasarcophaga harpax (Diptera, Sarcophagidae), with special reference to “hypopygium circumversum” of the calyptrate postabdomen. Kontyû 45: 372–376.Google Scholar
McAlpine, J. F. 1981. Morphology and terminology — adults. pp. 9–63 in McAlpine, J. F. et al. , Manual of Nearctic Diptera. Vol. 1. Agric. Can. Monogr. 27. 674 pp.Google Scholar
Mesnil, L. P. 1964. 64g. Larvaevorinae (Tachininae). pp. 849–864in Lindner, E. (Ed.), Fliegen palaearkt. Reg. 8. Stuttgart.Google Scholar
Mesnil, L. P. 1965. 64g. Larvaevorinae (Tachininae). pp. 865–879in Lindner, E. (Ed.), Fliegen palaearkt. Reg. 8. Stuttgart.Google Scholar
Nöthiger, R., Dübendorfer, A., and Epper, F.. 1977. Gynandromorphs reveal two separate primordia for male and female genitalia in Drosophila melanogaster. Wilhelm Roux Arch. 181: 367–373.CrossRefGoogle Scholar
O'Hara, J. E. Classification, phylogeny and zoogeography of the North American species of Siphona Meigen (Diptera: Tachinidae). Quaest. ent. (in press).Google Scholar
Ronquillo, M. C. and Horsfall, W. R.. 1969. Genesis of the reproductive system of mosquitoes. I. Female of Aedes stimulans (Walker). J. Morph. 129: 249–280.CrossRefGoogle Scholar
Schüpbach, T., Wieschaus, E., and Nöthiger, R.. 1978. The embryonic organization of the genital disc studied in genetic mosaics of Drosophila melanogaster. Wilhelm Roux Arch. 185: 249–270.CrossRefGoogle Scholar
Shinonaga, S. and Kano, R.. 1971. Fauna Japonica. Muscidae (Insecta: Diptera). Vol. 1. Keigaku, Tokyo. 242 pp.Google Scholar
White, M. J. D. 1973. The Chromosomes. 6th ed. Chapman and Hall, London. 214 pp.Google Scholar
Wieschaus, E. and Nöthiger, R.. 1982. The role of the transformer genes in the development of genitalia and analia of Drosophila melanogaster. Develop. Biol. 90: 320–334.CrossRefGoogle ScholarPubMed