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émergence saisonnière

Annales de Limnologie - International Journal of Limnology (1)

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Immatures of Rheocricotopus (Psilocricotopus) valgusChaudhuri & Sinharay of Darjeeling Himalaya with noteson ecology (Diptera : Chironomidae)
N. Hazra, D. K. Som, P. K. Chaudhuri
Journal:

Annales de Limnologie - International Journal of Limnology / Volume 34 / Issue 1 / March 1998

Published online by Cambridge University Press:

01 February 2009, pp. 75-82

Print publication:

March 1998
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The immatures (larva and pupa) of Rheocricotopus (Psilocricotopus) valgus Chaudhuri & Sinharay are described for the firsttime. The species belongs to chalybeatus group. The larva is opportunistic, present in the fast-flowing streams to slow-flowingorganically enriched sewage drains. It lives in tunnels made of various particles glued together by silky secretions. There are twogenerations a year with peak emergence in April-May and September-November. The sex ratio of females to males is 2:1.