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Subgenus Macrolina (Chrysomela Subgenus Macrolina)
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Chrysomela falsa
Photo#435628
Copyright © 2010
Gavan Watson
Adult leaf beetle -
Chrysomela falsa
Haines, Alaska, USA
June 26, 2010
I suspect this is an adult in the Chrysomelidae family. Not sure of ID beyond that. Unknown species of plant.
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Contributed by
Gavan Watson
on 1 August, 2010 - 1:36pm
Last updated 2 August, 2010 - 3:57pm
S.M. Clark: "Chrysomela falsa Brown; I am fairly confident"
Moved from
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…
v belov
, 2 August, 2010 - 3:57pm
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Could you elaborate on the reference -
I find a number of publications with S.M. Clark as one of the authors. I am also very curious to learn how
Chrysomela interrupta, knabi, falsa, lapponica
, and any others in the immediate group are distinguished. I could find no illustrations of
C. falsa
whatever, but there are many literature references to it. The other three names all appear very similar to the point of being basically indistinguishable as more than variants of one another, but it is difficult to trust identifications of photos posted on many internet web sites. If it all boils down to distribution, that would be a very weak argument for them being considered different species. It would be interesting to learn more and have the information more readily available. Thanks :0)
…
David J. Ferguson
, 2 August, 2010 - 4:55pm
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sorry, i asked for a name and that what i've got
as i said, i'm no expert, and Riley's bouncing the matter to Clark means to me that the latter must be the only one on the entire planet who could tell.
…
v belov
, 2 August, 2010 - 5:21pm
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I misunderstood (somehow missed one of the comments)
I thought you made the determination based on a published acount by Clark. So, sorry right back at you. It is very perplexing, and it would definitely be fun to learn more. Sometimes I think beetles (especially Lady & Leaf Beetles) are being identified by voodoo, as what look like mere variants (or brothers and sisters) are declared to be different species, but I'm certainly not experienced enough to know either.
…
David J. Ferguson
, 3 August, 2010 - 12:04am
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Was it on Willow or Polpar (Cottonwood)?
It looks like
Chrysomela knabi
.
I am guessing, but I expect that the only significant difference between out American
C. knabi
and European
C. lapponica
is where they are found. I saw
C. lapponica
all over Cottonwoods (= Black Poplar) in Prague last June, and they look pretty much exactly the same.
…
David J. Ferguson
, 1 August, 2010 - 5:17pm
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While I didn't make note at t
While I didn't make note at the time, we were in a river valley in S-W Alaska that was full of Black Cottonwood (
Populus trichocarpa
).
…
Gavan Watson
, 1 August, 2010 - 5:35pm
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Maybe there is an Alaskan record now! :0)
Something of a side note; European Black Poplar is
Populus nigra
. The well-known Lobardy Poplar is a columnar selection of it, but wild trees across Europe are very like
Populus deltoides & P. fremontii
in characteristics and growth habit.
…
David J. Ferguson
, 1 August, 2010 - 5:57pm
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thanks, Dave and Gavan--
it all makes a lot of sense; i asked Ed Riley, and he said that this is "
Chrysomela (Macrolina)
sp.,
lapponica
Species Group - S.M. Clark may know species" --so i'll try to refer the matter to Dr. Clark
…
v belov
, 2 August, 2010 - 12:34pm
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After the suggestion of Chrys
After the suggestion of
Chrysomela lapponica
, I googled the species. I also took
photographs
of what (I assume) was the beetle larvae, which look very similar to the
C. lapponica
larvae identified (down to the secretions from the thorax)
here
.
…
Gavan Watson
, 2 August, 2010 - 12:46pm
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the matter must be left to the experts
the group is very tough, and unless you've messed with them bastards your entire life and know for sure which species may look like this in a specific area, any suggestion based on looks would be nothing but a guess
…
v belov
, 2 August, 2010 - 12:54pm
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knabi seems to have no Alaskan records
…
v belov
, 1 August, 2010 - 5:19pm
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Chrysomela sp.
reminds me of the supercommon & supervariable boreal Eurasian
Ch. lapponica
-- but i dunno what's its vicariant in NA is
…
v belov
, 1 August, 2010 - 2:00pm
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