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1 - The Introspective Frog
from Part I - Frogs
Lewis I. Held, Jr, Texas Tech University
Book:

Animal Anomalies

Published online:

26 February 2021

Print publication:

18 March 2021, pp 3-16
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Summary

The abnormal animal featured here is a frog with its eyes in its mouth. In order to explain how it got that way, the chapter describes how retinas induce lenses. That leads to a discussion of induction in general and to a consideration of the overall strategies that animals use to build their anatomy.

Life cycle characteristics in Tanytarsus debilis (Meigen, 1830)(Diptera, Chironomidae)
B. R. Goddeeris
Journal:

Annales de Limnologie - International Journal of Limnology / Volume 27 / Issue 2 / 1991

Published online by Cambridge University Press:

01 February 2009, pp. 141-146

Print publication:

1991
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The life cycle of Tanytarsus debilis in two trout-ponds at Mirwart (Belgian Ardennes) has been investigated. The maincharacteristics were deduced from an analysis of the larval population dynamics. Photoperiod and temperature appearto determine the annual pattern. T. debilis is a spring and summer species and is trivoltine at Mirwart. Special attentionis given to the synchronizing effects of diapause phenomena on the emergences and on the larval growth periods. Theliterature data, exclusively on adults, have been reinterpreted.

Life cycle characteristics in Tanytarsus sylvaticus (van der Wulp,1859) (Chironomidae, Diptera)
B. R. Goddeeris
Journal:

Annales de Limnologie - International Journal of Limnology / Volume 26 / Issue 1 / 1990

Published online by Cambridge University Press:

15 August 2009, pp. 51-64

Print publication:

1990
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The life cycle of Tanytarsus sylvaticus (van der Wulp, 1859) has been analysed in two quite different sites in Belgium(Mirwart, Ardennes and Diksmuide, West-Flanders). T. sylvaticus is strictly univoltine ; its single emergence period occurs in early spring. A summer diapause in the 3rd instar is typical of this species. The synchronization of the emergenceperiod, however, seems to depend, on a second diapause, this time in the 4th instar, during winter.