Translator Disclaimer
1 January 2000 Life History and Case Building Behavior of Molanna tryphena (Trichoptera: Molannidae) in Two East Texas Spring-Fed Streams
Author Affiliations +
Abstract
The life history and case-building behavior of Molanna tryphena Betten from 2 spring-fed tributaries in east Texas were studied from January 1997 to May 1998. The 344 larvae, pupae, and adults sampled indicated a univoltine life cycle, with an extended adult emergence period. Fecundity was 76.2 ± 9.7 eggs per female. Larvae were recruited in spring and summer, and grew to late instars or pupae by fall. Larvae and pupae were found mainly in the sand substrate. Eggs, larvae of 2nd and 5th instars, pupae, cases, and adults are described. Case reconstruction behavior was observed and videotaped. Larvae constructed emergency cases by gluing together sand and burrowing inside to form a tube. Sand and gravel were added over the next 12 h to strengthen the tube and add the cowl and flange typical of Molannidae.
Tammi S. Gupta and Kenneth W. Stewart "Life History and Case Building Behavior of Molanna tryphena (Trichoptera: Molannidae) in Two East Texas Spring-Fed Streams," Annals of the Entomological Society of America 93(1), (1 January 2000). https://doi.org/10.1603/0013-8746(2000)093[0065:LHACBB]2.0.CO;2
Received: 30 December 1998; Accepted: 1 June 1999; Published: 1 January 2000
JOURNAL ARTICLE
10 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top