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Micrasema longulum (Trichoptera: Brachycentridae) builds a special pupation chamber

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons57026

Zwick,  Peter
Limnological River Station Schlitz, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Zitation

Zwick, P. (1998). Micrasema longulum (Trichoptera: Brachycentridae) builds a special pupation chamber. Annales de Limnologie, 34(4), 437-444.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-C8DF-B
Zusammenfassung
Larvae of the caddisfly suborder Integripalpia normally pupate in the last instar larval tube-case. Measurements of case structures show that larvae of Micrasema longulum differ in adding a long parallel-sided anterior section to their tube-cases, shortly before pupation. They pupate in the newly built section, discarding the slightly conical larval case. Literature data suggest that two additional species of Micrasema exhibit similar behaviour. Production of a special section of tube-case for pupation is reminiscent of the situation in the primitive suborders Annulipalpia and Spicipalpia which build a pupal case which is often the only construction during the entire life cycle. It is uncertain if the behaviour of Micrasema is atavistic, or if it developed independently.