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Biology of snail-killing flies from Africa and southern Spain (Sciomyzidae: Sepedon)*†

Published online by Cambridge University Press:  06 April 2009

L. V. Knutson ,
S. E. Neff  and
C. O. Berg
L. V. Knutson
Affiliation:
Department of Entomology and Limnology, Cornell University, Ithaca, New York
S. E. Neff
Affiliation:
Department of Biology, Virginia Polytechnic Institute, Blacksburg, Virginia
C. O. Berg
Affiliation:
Department of Entomology and Limnology, Cornell University, Ithaca, New York
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Extract

Sepedon h. hispanica was collected in freshwater marshes in southern Spain and reared through its entire life-cycle in the laboratory.

Larvae of this species differ from those of the twenty-one other reared species of Sepedon in not normally invading water, feeding as parasitoids throughout the first half of larval life (that is, permitting their food snails to live for several days), and in restricting their diet to the genus Succinea during that time.

Each newly hatched larva of S. h. hispanica crawls between the mantle and foot of a living Succinea elegans, S. pfeifferi or S. putris and remains there while developing into or completely through the second larval instar.

After the death of the first food snail the larva becomes predatory and loses its host specificity. Then it attacks a wide range of pulmonate snails, kills each victim quickly, and destroys a series of individuals belonging to species of Succinea, Lymnaea and Physa.

Adults of S. ruficeps and S. scapularis were reared from larvae and pupae collected in Ethiopia.

The larvae of both African species are aquatic predators which kill and consume various pulmonate snails unselectively. They are equivalent ecologically to all other larvae of Sepedon previously described.

The egg, three larval instars, and puparium of S. h. hispanica, and the mature larvae and puparia of S. ruficeps and S. scapularis, are described and figured.

A key is presented to immature stages of the Palaearctic species of Sepedon.

We wish to thank Dr W. C. Frohne, Alaska Methodist University, Anchorage, Alaska for collecting and rearing Sepedon ruficeps and S. scapularis. Dr E. Morales Agacino, Instituto Espanol de Entomologia, Madrid; Dr M. Mendizabol, Dr J. Verdejo and D. J. Paris Lopez, Instituto de Acclimatacion, Almeria; and Professor Dr I. Docavo Alberti and Dr B. Llopis Minguez, University of Valencia, aided during the senior author's field-work in Spain. We thank Dr J. Verbeke, Institut royal des Sciences naturelles de Belgique, for determinations and distributional data; Mr L. W. Stratton, Harpenden, England, and Dr H. J. Walter, Dayton, Ohio, Museum of Natural History, for determinations of Gastropoda; and Mrs L. Lyneborg, Zoological Museum, Copenhagen, for Fig. 25.

Type
Research Article
Information
Parasitology , Volume 57 , Issue 3 , August 1967 , pp. 487 - 505
Copyright
Copyright © Cambridge University Press 1967

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References

REFERENCES

Adams, C. F. (1903). Dipterological contributions. Kans. Univ. Sci. Bull. 2, 21–47.Google Scholar
Bequaert, J. (1925). The arthropod enemies of mollusks, with a description of a new dipterous parasite from Brazil. J. Parasit. 11, 201–12.CrossRefGoogle Scholar
Berg, C. O. (1953). Sciomyzid larvae (Diptera) that feed on snails. J. Parasit. 39, 630–6.CrossRefGoogle ScholarPubMed
Berg, C. O. (1961). Biology of snail-killing Sciomyzidae (Diptera) of North America and Europe. Verh. XI int. Kongr. Ent. 1, 197–202.Google Scholar
Berg, C. O. (1964). Snail control in trematode diseases: the possible value of sciomyzid larvae, snail-killing Diptera. Adv. Parasitol. 2, 259–309.CrossRefGoogle ScholarPubMed
Bhatia, M. L. & Keilin, D. (1937). On a new case of parasitism of snail (Vertigo genesii Gredl.) by a dipterous larva. Parasitology 29, 399–408.CrossRefGoogle Scholar
Foote, B. A., Neff, S. E. & Berg, C. O. (1960). Biology and immature stages of Atrichomelina pubera (Diptera: Sciomyzidae). Ann. ent. Soc. Am. 53, 192–9.CrossRefGoogle Scholar
Frey, R. (1958). Zur Kenntnis der Diptera brachycera p.p. der Kapverdischen Inseln. Commentat. biol. 18 (4), 1–61.Google Scholar
Hennig, W. (1952). Die Larvenformen der Diptera 3, Tiel. 628 pp. Berlin: Akademie-Verlag.Google Scholar
Keilin, D. (1919). On the life-history and larval anatomy of Melinda cognata Meigen parasitic in the snail Helicella (Heliomanes) virgata Da Costa, with an account of the other Diptera living upon molluscs. Parasitology 11, 430–55.CrossRefGoogle Scholar
Keilin, D. (1921). Supplementary account of the dipterous larvae feeding upon molluscs. Parasitology 13, 180–3.CrossRefGoogle Scholar
Lundbeck, W. (1923). Some remarks on the biology of the Sciomyzidae, etc. Vidensk. Meddr dansk. naturh. Foren. 76, 101–9.Google Scholar
Neff, S. E., & Berg, C. O. (1966). Biology and immature stages of malacophagous Diptera of the genus Sepedon (Sciomyzidae). Bull. Va agric. Exp. Stn, no. 566, 1–113.Google Scholar
Oldham, C. (1912). Report on land and fresh-water Mollusca observed in Hertfordshire in 1910. Trans. Herts. nat. Hist. Soc. Fld. Club 14, 288.Google Scholar
Reuter, O. M. (1913). Lebensgewohnheiten und Instinkte der Insekten. 488 pp. Berlin: Friedländer.Google Scholar
Sack, P. (1939). Sciomyzidae. Fliegen palaearkt. Reg. 5, (1), lief 37 129.Google Scholar
Steyskal, G. C. (1965). The subfamilies of Sciomyzidae of the World (Diptera, Acalyptratae). Ann. ent. Soc. Am. 58, 593–4.CrossRefGoogle Scholar
Steyskal, G. C. & Verbeke, J. (1956). Sepedoninae (Sciomyzidae, Diptera) from Africa and southern Arabia. Bull. Inst. r. Sci. nat. Belg. 32, 1–14.Google Scholar
Verbeke, J. (1950). Sciomyzidae (Diptera Cyclorrhapha). Explor. Parc natn. Albert Miss. G. F. de Witte. 66, 1–97.Google Scholar
Verbeke, J. (1961). Sciomyzidae (Diptera Brachycera Malacophaga). Explor. Parc. natn. Upemba Miss G. F. de Witte. 61, 1–37.Google Scholar
Verbeke, J. (1962). Contribution a l'étude des diptères malacophages I. Sciomyzidae nouveaux ou peu connus d'Afrique du Sud et de Madagascar. Bull. Inst. r. Sci. nat. Belg. 38, 1–16.Google Scholar
Verbeke, J. (1963). Sciomyzidae Sepedoninae (Diptera Brachycera). Explor. Parc natn. Garamba Miss. H. de Saeger. 39, 51–86.Google Scholar
Verbeke, J. (1964). Contribution a l'étude des diptères malacophages. II. Données nouvelles sur la taxonomie et la répartition géographique des Sciomyzidae paléarctiques. Bull. Inst. r. Sci. nat. Belg. 49, 1–27.Google Scholar