| Issue |
Ann. Limnol. - Int. J. Lim.
Volume 34, Number 1, March 1998
|
|
|---|---|---|
| Page(s) | 75 - 82 | |
| DOI | https://doi.org/10.1051/limn/1998008 | |
| Published online | 15 March 2009 | |
Immatures of Rheocricotopus (Psilocricotopus) valgus Chaudhuri & Sinharay of Darjeeling Himalaya with notes on ecology (Diptera : Chironomidae)
Stades immatures de Rheocricotopus (Psilocricotopus) valgus Chaudhuri & Sinharay de l'Himalaya et notes sur l'écologie (Diptera : Chironomidae)
Department of Zoology, University of Burdwan, Burdwan 713
104, India
The immatures (larva and pupa) of Rheocricotopus (Psilocricotopus) valgus Chaudhuri & Sinharay are described for the first time. The species belongs to chalybeatus group. The larva is opportunistic, present in the fast-flowing streams to slow-flowing organically enriched sewage drains. It lives in tunnels made of various particles glued together by silky secretions. There are two generations a year with peak emergence in April-May and September-November. The sex ratio of females to males is 2:1.
Résumé
Les stades immatures, larve et nymphe de Rheocricotopus (Psilocricotopus) valgus sont décrits pour la première fois. L'espèce appartient au groupe chalybeatus. La larve est opportuniste et colonise aussi bien les rivières à débit rapide que les canaux d'égouts riches en matière organique. Elle vit dans des fourreaux faits de particules variées réunies par des sécrétions soyeuses. Il y a 2 générations annuelles avec un pic d'émergence en avril-mai et septembre-novembre. Le sex-ratio femelle/mâle est 2:1.
Key words: larva / pupa / rheocricotopus / habitat / larval dwelling / seasonal emergence
Mots clés : larve / nymphe / rheocricotopus / habitats / émergence saisonnière
© Université Paul Sabatier, 1998
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