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Trichoptera: Molannidae of Gunnison County, Colorado

Molanna flavicornis

Banks 1914
Updated 19 April 2013
TSN 116475

This is the only species of this genus in western North America.

Good Links

Other Websites:
Illustration - from the University of Alberta Entomology Collection Species page
     Has photos of larvae, description, habitat information, range and more.

Photos, Map, Museum specimens, DNA - Barcodinglife.org


Banks,N 1914 American Trichoptera- notes and descriptions. Canadian Entomologist 46:149-156, 201-204, 252-258, 261-268.

Djernæs,M and Sperling,FAH 2012 Exploring a key synapomorphy: correlations between structure and function in the sternum V glands of Trichoptera and Lepidoptera (Insecta). Biological Journal of the Linnean Society, 106: 561-579.

Dodds,GS and Hisaw,FL 1925 Ecological studies on aquatic insects. III. Adaptations of caddisfly larvae to swift streams. Ecology 6(2)123-137. Abstract and first page

Herrmann,SJ; Ruiter,DE and Unzicker,JD 1986 Distribution and records of Colorado Trichoptera. Southwestern Naturalist 31 4, 421-457.
     Notes that this species is found in Gunnison County.

Löfstedt,C; Bergmann,J; Francke,W; Jirle,E; Hansson,BS and Ivanov,VD 2008 Identification of a sex pheromone produced by sternal glands in females of the caddisfly Molanna angustata Curtis. Journal of chemical Ecology, 34(2), 220-228. HTML
     Abstract: " In the caddisfly Molanna angustata, females produce a sex pheromone in glands with openings on the fifth sternite. Gas chromatographic analyses of pheromone gland extracts with electroantennographic detection revealed four major compounds that stimulated male antennae. These compounds were identified by means of gas chromatography-mass spectrometry and enantioselective gas chromatography as heptan-2-one, (S)-heptan-2-ol, nonan-2-one, and (S)-nonan-2-ol in the approximate ratio of 1:1:4:10, respectively. Field tests showed that the mixture of the two alcohols was attractive to males whereas addition of the corresponding ketones reduced trap catches. The sex pheromone of M. angustata, a species in the family Molannidae within the suborder Integripalpia, is similar to the pheromones or pheromone-like compounds previously reported from six other trichopteran families, including members of the basal suborder Annulipalpia. This suggests that minimal evolutionary change of the pheromone chemistry has taken place within the leptoceroid branch of integripalpian Trichoptera compared to the ancestral character state. "

Merrill,D 1969 The distribution of case recognition in ten families of caddis larvae (Trichoptera). Animal Behavior 17(3)486-493.

Neave,F 1933 Ecology of two species of Trichoptera in Lake Winnipeg. Internationale Revue der gesamten Hydrobiologie und Hydrographie 29(1/2):17-28.
     Associated the larvae and adult.

Roy,D; Harper,PP 1980. Females of the Nearctic Molanna (Trichoptera: Molannidae). Proceedings of the Entomological Society in Washington 82:299-236.

Brown,WS 2005 Trichoptera (Caddisflies) of Gunnison County, Colorado, USA