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

804 G.B. Wiggins and C.R. Parker
Genus Chyranda. The single species of Chyranda is widely distributed in small, cold
streams in northern and western montane regions of North America. Larvae are detritivorous
(e.g. Irons 1988).
78. Chyranda centralis (Banks) (I) Nearctic, transcontinental
Distribution: Yukon, Alaska to California and Quebec.
Yukon records: 8, 11, 14, 16, 17 (ROME, SMDV); 12 (NW 1984).
Biological information: Adults have been collected in the Yukon 27 July –12 August.
Genus Clistoronia. Clistoronia are confined to western North America, where 4 species are
known. Larvae live in small lakes and ponds, where they are detritivorous.
79. Clistoronia magnifica (Banks) (I) Nearctic, western montane
Distribution: Yukon, Alaska to California.
Yukon records: 11, 12, 16, 17 (CNCI, ROME, SMDV).
Biological information: Adults have been collected in the Yukon 17 June –17 August.
Genus Dicosmoecus. Four species of Dicosmoecus inhabit running waters in western
montane North America, and 2 others occur in eastern Asia (Wiggins and Richardson 1982).
The 2 Yukon species feed mainly on vascular plant materials and insects.
80. Dicosmoecus atripes (Hagen) (I) Nearctic, western montane
Distribution: Yukon, Alaska to California, New Mexico.
Yukon records: 8, 10, 12, 14, 16 (ROME); 17, 19 (CNCI).
Biological information: Adults have been collected in the Yukon 23 June –18 August. Dippers, or
water ouzels, representing a small family of passeriform birds (Cinclidae) frequenting streams, feed
on larvae of this species in Alaska (Ellis 1978b).
81. Dicosmoecus obscuripennis Banks (III) Palaearctic-East Beringian
Distribution: Yukon, Alaska; Russian Far East (Nagayasu and Ito 1993).
Yukon records: 4, 8, 10, 12 (ROME); 17 (CNCI).
Biological information: Adults have been collected in the Yukon 26 July – 7 August.
Genus Ecclisomyia. This is a small Holarctic genus confined to montane areas of western
North America and eastern Asia; larvae live in small streams or rocky lake shores, and feed
on diatoms and plant detritus (Irons 1988).
82. Ecclisomyia conspersa Banks (I) Nearctic, western montane
Distribution: Yukon, Alaska to California.
Yukon records: 8, 10, 12, 14, 16, 17 (CNCI, ROME, SMDV); 19 (NW 1984).
Biological information: Adults have been collected in the Yukon 26 May –17 August.
Genus Glyphopsyche. This is a Nearctic genus of 2 species; larvae of G. irrorata live in
accumulations of plant materials in slowly flowing waters and in marshes, where they are
probably detritivorous.
83. Glyphopsyche irrorata (Fabricius) (I) Nearctic, transcontinental
Distribution: Yukon, Alaska to California and Newfoundland.
Yukon records: 12 (ROME).
Biological information: Adults have been collected in the Yukon 26 May.
Genus Grammotaulius. This is a widespread Holarctic genus of northern and montane
ponds and slow streams. Larvae are probably detritivorous.
84. Grammotaulius alascensis Schmid (IV) East Beringian
Distribution: Yukon, Alaska, Northwest Territories.
Yukon records: 2 (NW 1984); 4, 8, 10 (ROME, SMDV).
Biological information: Adults have been collected in the Yukon 23 – 31 July.
Taxonomic notes: Grammotaulius subborealis Schmid (1964) is a new synonym. See Taxonomic Note 6.