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THE SUBIMAGO OF EPHORON LEUKON WILL., AND A DISCUSSION OF THE IMAGO INSTAR. (EPHEM.)

Published online by Cambridge University Press:  31 May 2012

F. P. Ide
F. P. Ide
Affiliation:
Department of Biology, University of Toronto
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Extract

Lameere (1917), in a paper dealing with the evolution of mayflies recognizes the moult between subimago and imago as a mere delamination of the outer layer of cuticle resulting in a lighter more fragile imago. Needham (1935) agrees with this contention and states that the subimago “does not represent a growth period and is therefore not a true instar.” Further, “It is only a casting of the delaminated, hairy outer cuticle.” This is a recent view and at variance with the more conventional one that both the subimago and imago represent separate insttars.

Type
Articles
Information
The Canadian Entomologist , Volume 69 , Issue 2 , February 1937 , pp. 25 - 29
Copyright
Copyright © Entomological Society of Canada 1937

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References

REFERENCES

1867 Lubbock, J., On the development of Chloeon dimidiatum. Trans. Linnean Soc. London, 25: 477–492.Google Scholar
1917 Lameere, Aug., Etude sur l'evolution des ephemeres Pt. I. Bull. de la Soc. Zoologique de France. XLII, 41–59.Google Scholar
1922 Murphy, H. E., Notes on the biology of some of our North American species of may-flies, Pt. 1. Bull. Lloyd Library 22, Entom. Series 2: 1–39.Google Scholar
1935 Needham, J. G., Traver, J. R., Hsu, Y., The biology of may-flies. 98–100.Google Scholar