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HELOPHORUS ORIENTALIS (COLEOPTERA: HYDROPHILIDAE), A PARTHENOGENETIC WATER BEETLE FROM SIBERIA AND NORTH AMERICA, AND A BRITISH PLEISTOCENE FOSSIL

Published online by Cambridge University Press:  31 May 2012

R. B. Angus
R. B. Angus
Affiliation:
Department of Zoology, Parks Road, Oxford, England
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Abstract

The Helophorus species recorded by McCorkle as H. brevipalpis Bedel, and by earlier workers as H. granularis (L.) is found, on examination of the types, to be H. orientalis Motschulsky, a species widespread in eastern Siberia.The types of H. orientalis are described, and a lectotype is designated. The type of H. sahlbergi Kuwert, a species synonymous with H. orienta’is, is also described. Further Siberian and North American material is described with reference to the type, and the means of distinguishing H. orientalis from H. granularis and H. brevipalpis are discussed.Fossil prothoraces from Pleistocene deposits at Brandon, Warwickshire and Great Billing, Northamptonshire, England, are referred to H. orientalis.The life histories of the three species are compared, and differences in the egg cocoons and larvae are illustrated. H. orientalis is shown by laboratory breeding to be parthenogenetic. In the other species no maleless populations are known, and although there is no proof that they cannot breed without males, this is considered very unlikely.The ecologies of the three species are discussed.

Type
Articles
Information
The Canadian Entomologist , Volume 102 , Issue 2 , February 1970 , pp. 129 - 143
Copyright
Copyright © Entomological Society of Canada 1970

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References

Coope, G. R. 1968. An insect fauna from mid-Weichselian deposits at Brandon, Warwickshire. Phil. Trans. R. Soc. (B) 254: 425–456.Google Scholar
Fernando, C. H. 1958. The colonisation of small freshwater habitats by aquatic insects. Ceylon J. Sci. (B) 1: 117–154.Google Scholar
McCorkle, D. V. 1967. A revision of the species of Elophorus Fabricius in America north of Mexico. University of Washington Ph.D. thesis, Seattle.Google Scholar
Morgan, A. 1969. A fauna from Great Billing, Northamptonshire, England. Opusc. ent. 34: 108–129.Google Scholar
Orchymont, A. d'. 1934. Notes sur quelques Hélophores paléarctiques et néarctiques (Col. Palpic.). Bull. Annls Soc. r. ent. Belg. 74: 251–261.Google Scholar
Orchymont, A. d'. 1945. Notes sur des Helophorus, spécialement Américains (Coleoptera Palpicornia Hydrophilidae). Bull. Mus. r. Hist. nat. Belg. 21 (8): 1–27.Google Scholar
Schiødte, J. C. 1862. De metamorphose Eleuthatorum observationes. Krøyer Naturh. Tidsskr. 2: 193–232.Google Scholar
Shotton, F. W. 1968. The Pleistocene succession around Brandon, Warwickshire. Phil. Trans. R. Soc. (B) 254: 387–400.Google Scholar