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Caddisflies (Trichoptera)
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Arctopsychinae
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Arctopsyche
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Arctopsyche grandis
Photo#264265
Copyright © 2009
Tim Loh
Net-spinning Caddisfly -
Arctopsyche grandis
Bow River, Calgary, Alberta, Canada
April 6, 2009
Size: 18 mm
Underside of head capsule showing the parallel median ventral plate dividing the gena (key diagnostic character).
Images of this individual:
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Contributed by
Tim Loh
on 8 April, 2009 - 1:23am
Last updated 6 January, 2010 - 3:24am
Moved
Moved from
Arctopsyche
.
…
Tim Loh
, 6 January, 2010 - 3:24am
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Moved
Moved from
Parapsyche
.
…
Tim Loh
, 12 April, 2009 - 11:28am
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Tim...
might you be misinterpreting the ventral apotome of the specimens that you have identified as
Parapsyche
?
Parapsyche
usually has a distinctly rectangular shape where the apotome meets the rear of the head. Although the sides of the genae do look fairly parallel in your specimens, they also appear to narrow posteriorly.
I would guess that these are
Arctopsyche
. The most convincing reason is that
Parapsyche
has hairy tufts at the sa2 and sa3 positions of most tergites. You can see these clearly on Donald's
specimen
of
Parapsyche apicalis
. I cannot find these in your specimens.
…
Lloyd Gonzales
, 12 April, 2009 - 11:16am
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Thanks Lloyd
I recently collected a large specimen which I identified positively as
Parapsyche
(the big greenish one pictured)- after comparing both specimens, this may be an
Arctopsyche
after all.
…
Tim Loh
, 12 April, 2009 - 11:27am
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