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Humpless Casemaker Caddisflies (Brachycentridae)
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Brachycentrus
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subgenus Sphinctogaster (Brachycentrus subgenus Sphinctogaster)
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Brachycentrus lateralis
Photo#80244
Copyright © 2006
Claude Pilon
Trichoptera -
Brachycentrus lateralis
Montreal, Quebec, Canada
September 25, 2006
This Trichoptera was foraging under 5 centimeters (2 inches) of water (St-Lawrence River). The side of the case near the head of the nymph has a squared shape.
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Contributed by
Claude Pilon
on 29 September, 2006 - 10:24am
Last updated 28 September, 2010 - 10:22am
Moved
Moved from
Brachycentrus
.
…
Claude Pilon
, 28 September, 2010 - 10:22am
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Moved
Moved from
Brachycentrus numerosus
.
Your comments are very interesting. Thanks! And your are right to be careful.
…
Claude Pilon
, 2 July, 2008 - 12:40pm
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Qualification
You're welcome, Claude, but I would be more comfortable if this specimen were backed off to genus. Although this type of case
is
attributed to
numerosus
, I'm not sure that is enough to say definitively that it is that species. Prior to 1984, that probably would have been a perfectly acceptable ID. However, the genus has been revised, and case types have not been associated with all
Brachycentrus
. (Some even change type as they grow.)
I think it is quite safe to say that this is
Brachycentrus
, a member of the subgenus
Sphinctogaster
, and either
numerosus
or a sister species. The other candidates would seem to be
appalachia
,
solomoni
(both new species, Flint, 1984) or
incanus
(though the larvae of this species seem not to have been definitively associated with adults--a whole other can of worms.) Unfortunately, I cannot convince myself that this specimen is a dead-on match for any of them. Pehaps this is because it has yet to darken completely and markings/color are not yet fully developed; I don't know.
OK, that's probably much more than you needed (or wanted?) to know, but I do try to be careful.
…
Lloyd Gonzales
, 29 June, 2008 - 7:09pm
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This specimen looks to be Bra
This specimen looks to be Brachycentrus lateralis. It is the only Brachycentrus spp I know that has 3 narrow dark stripes on the dorsum of it's head. The case is also a close match for the B lateralis that I have seen.
…
SBeaty
, 27 September, 2010 - 5:16pm
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Moved
Moved from
Caddisflies
.
Thanks Lloyd!
…
Claude Pilon
, 18 May, 2008 - 7:49am
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Grannom
This is
Brachycentrus
. The square-topped case with a round bottom (contructed mostly of silk) is attributed to
B. numerosus
…
Lloyd Gonzales
, 17 May, 2008 - 11:52pm
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