Caddisflies of the Yukon - Department of Biological Sciences ...

Caddisflies of the Yukon 793
outlined briefly to provide a broader context for the Yukon species; distributional information
for North America is based on the manuscript for an Annotated Catalogue of the
Trichoptera of North America North of Mexico (Wiggins and Flint in prep.), and for Europe
on BotojAneanu and Malicky (1978). Extended comment required on the status of certain
species is included under Taxonomic Notes. Families, genera, and species are listed alphabetically
under the 3 suborders of Trichoptera proposed by Wiggins and Wichard (1989)
and Frania and Wiggins (1997). The classification of families and genera follows Wiggins
(1996). Roman numerals following the names indicate the category to which the species is
assigned for biogeographic analysis. Arabic numbers associated with the species names
provide a cross-reference to distributional and other data in the annotated species list. Dates
for collections of adults are based on material examined and on published records.
Annotated Species List of the Yukon Trichoptera
This list records 145 species, mainly from specimens we examined, but also from
literature records where no material was available. Additional species undoubtedly have yet
to be found. Distributional records for the Yukon are grouped by ecogeographic regions as
identified in Fig. 1.
Suborder Spicipalpia
These are the cocoon-making caddisflies, characterized by pupal cocoons of stout silk
lacking openings of any kind for circulation of water over the pupa. They are for the most
part inhabitants of cool running waters, although larvae of some genera of the Hydroptilidae
are adapted to warmer lentic sites.
Family Glossosomatidae
Larvae occur on rocks in flowing waters where they graze on diatoms, other algae, and
deposits of fine organic particles. The family is represented in most faunal regions of the
world; 6 Nearctic genera are recognized, comprising approximately 75 species.
Genus Glossosoma. Species occur through the Nearctic, Palaearctic, and Oriental faunal
regions; of 22 North American species now known, all but 3 are confined to the western
mountains. Three species are recorded from the Yukon, representing 2 of the 3 Nearctic
subgenera: G. (Ripaeglossa) alascense; G. (Synafophora = Eomystra) intermedium and verdona.
1. Glossosoma alascense Banks (I) Nearctic, western montane
Distribution: Yukon, Alaska, south to Utah.
Yukon records: 8, 10, 12 (ROME); 16, 19 (NW 1984).
Biological information: Adults have been collected in the Yukon 23 June – 9 August.
2. Glossosoma intermedium (Klapalek) (II) Holarctic, transcontinental
Distribution: Yukon to Montana, Quebec, Tennessee; central Europe to Finland and the northern part
of European Russia, eastward through Siberia to Chukotka and Kamchatka (Levanidova 1975, 1982).
Yukon records: 5, 10, 12, 19 (ROME).
Biological information: Adults have been collected in the Yukon 23 May – 9 August.
3. Glossosoma verdona Ross (I) Nearctic, western montane
Distribution: Yukon, Alaska, south to California and Utah.
Yukon records: 8, 17 (SMDV); 10 (ROME).
Biological information: Adults have been collected in the Yukon 31 May – 28 June.
Family Hydroptilidae
Hydroptilidae are widely distributed throughout the world with genera characteristic of
all types of fresh waters from cold springs to lakes. Larvae feed principally on algae,