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Trichoptera: Glossosmatidae of Gunnison County, Colorado

Glossosoma verdona
Saddle Case Makers

Ross 1938
Updated 13 Jan 2010
TSN 117221


Although most sources use the name Glossosoma verdona, as of 26Aug 05 the World Trichoptera List and ITIS website refer to this species as Glossosoma verdonum. Then, just to be confusing, the Neartica website still refers to this species as Glossoma verdona. When I figure out what the story is, I will update this webapge.

Good Links

On this website:
Glossosoma Introduction

Other Websites:
University of Alberta Entomology Collection Species page
     Has illustration of male genitalia, description, habitat information, range and more.


Duffield,RM; Flint,OS and Nelson,CH 1994 Glossosoma verdona (Glossosomatidae: Trichoptera) in the diet of Brook Trout (Salvelinus fontinalis) in Libby Creek, Wyoming, USA. Journal of the Kansas Entomological Society 67(3) 277-282.
     Abstract: "Dietary samples from brook trout, Salvelinus fontinalis Mitchell, were analyzed to obtain information on the life history of the caddisfly, Glossosoma verdona Ross. The 220 samples that were obtained from brook trout from mid-May through mid-August contained 14,220 dietary items. Of these, 44 samples contained a total of 541 pharate, teneral, and mature adults of Glossosoma verdona. Analysis of the samples indicates that brook trout feed on G. verdona at a minimum of two periods in its life history, emergence and oviposition. The former occurs at a peak period during mid-June, whereas the latter occurs from late June to mid-July. The absence of G. verdona larvae in the diet of the brook trout is attributed to the absence of this stage in the stream during the sampling period. "

Irons,JG III 1988 Life history patterns and trophic ecology of Trichoptera in two Alaskan (U.S.A.) subarctic streams. Canadian Journal of Zoology, 66:1258-1265. Abstract

Poff,NL and Ward,JV 1988 Use of occupied Glossosoma verdona (Trichoptera: Glossosomatidae) cases by early instars of Baetis spp.(Ephemeroptera: Baetidae) in a Rocky Mountain stream. Entomological news (USA).

Poff,NL; Wellnitz,TA and Monroe,JB. 2003 Redundancy among three herbivorous insects across an experimental current velocity gradient. Oecologia 134:262-269. PDF

Ross, HH 1938 Descriptions of Nearctic Caddisflies. Bulletin of the Illinois Natural History Survey 21:101-183.
     Describes this species on page 110-111 and in figure 15.

Voelz,NJ; Poff,NL; Ward,JV 1994 Differential effects of a brief thermal disturbance on caddisflies (Trichoptera) in a regulated river. American Midland Naturalist 132 1, 173-182. Abstract

Brown,WS 2005 Trichoptera of Gunnison County, Colorado, USA