lighter spotted leaf beetle - Paranapiacaba tricincta

Moved

… Jim McClarin, 5 September, 2007 - 5:22pm

Paranapiacaba tricincta

From leaf beetle expert and BYU Prof Shawn Clark, PHD whose publications are listed and include "The western North American genus Androlyperus Crotch, 1983 (Coleoptera: Chrysomelidae:Galerucinae)." Insecta Mundi. 13(2001):217-227 - (that's the reason I contacted him, after a web search on the genus name)

"This is a specimen of Paranapiacaba tricincta (Say)."

with that name, a quick web search turned up hits on invasive.org, which has several photos (less impressive than yours :) and lists common names as "diabroticine beetle, checkered melon beetle, buffalogourd beetle", but I had difficult with getting the site to provide any further info.

… Tim Moyer, 5 September, 2007 - 4:19pm

thanks for the efforts

now someone from the west still need to find a real Androlyperus I guess. The antenna fit Paranapiacaba well, which to me is basically a Diabrotica with the third antenomere longer than the second. Only the few species I know are all mostly with reddish markings. Thought I had it figured out with Androlyperus. Guess not. I´d like to know what makes this a Paranapiacaba and not Androlyperus. Suppose the difference between the two genera must be visible somewhere on Jim´s series

… Rob Westerduijn, 6 September, 2007 - 8:45pm

claws

not sure if you have access to "American Beetles" down your way, but I looked up the key for Galerucinae, and Paranapiacaba and Androlyperus actually split at the 2nd couplet (of 57, excluding another 50 or so for Alticini).
2a) "Tarsal claws simple, or bifid with inner lobe comparatively narrow and pointed" leads to Paranapiacaba.
2b) "Tarsal claws appendiculate, with inner lobe comparatively broad and blunt" leads to Androlyperus.
Not sure if Paranapiacaba is simple or bifid, but there's figures of bifid vs. appendicultate claws and they sure look close to me.

But you're certainly correct about needing some more BugGuide contributors from the southwest! Good thing Jim at least makes some trips there :) I've been in 45 of the 50 states over the years (and I don't count airport stops), but my traveling days are mostly on hold for now. Still, come January, Tucson will be looking really good.

… Tim Moyer, 7 September, 2007 - 10:35pm

claws

yes, the claws of course. Hard to see from a picture though. Paranapiacaba has bifid claws like Diabrotica.
I would like that key. I only have what is on the internet. If it is just a few pages could you send me a copy?
My personal collecting in the states sums at just some airport stops with some Diabrotica umdecemlineata in Houston on my way from Holland to Costa Rica back in 2000

… Rob Westerduijn, 10 September, 2007 - 12:30pm

Thanks, Tim,

for your tireless efforts to nail these ID cases shut. And thanks to Prof. Clark for taking a look at the image.

… Jim McClarin, 5 September, 2007 - 5:48pm

Moved

Moved from Skeletonizing leaf beetles.

… Jim McClarin, 4 June, 2007 - 4:47am

Androlyperus

found the genus now I think, but not the same species. See: http://mcz-28168.oeb.harvard.edu/mcz/FMPro?-DB=Image.fm&-Lay=web&-Format=images.htm&Species_ID=4362&-Find

… Rob Westerduijn, 31 May, 2007 - 11:41am

Nomina Nearctica lists five spp.

A. californica Schaeffer 1906 (Luperodes)
A. ful*vus Crotch 1873 (Androlyperus)
A. inc*isus Schaeffer 1906 (Androlyperus)
A. macu*latus Leconte 1883 (Androlyperus)
A. nigr*escens Schaeffer 1906 (Malacorhinus

… Jim McClarin, 4 June, 2007 - 4:45am

Only three known for nearctic region.

The only other sp. listed on Nomina Nearctica is Cer*otoma atr*ofasciata.
Here are some Cer*otoma-related images:
C. tri*furcata,
showing variability of C. tri*furcata,
distribution map fot C. tri*furcata,
(scroll down) showing variability of C. atr*ofasciata.

As the above range map indicates, New Mexico is at the extreme western end of C. tri*furcata's range, which should mean there is a greater potential for color/pattern divergence from the norm in an already wildly variable species.

… Jim McClarin, 8 February, 2007 - 12:09pm

not Cerotoma

This one keeps frustrating me. It keys Cerotoma but it probably isn`t, not atrofaciatus either. Must be one of the western genera not in the key (from Alabama) I used.

… Rob Westerduijn, 8 February, 2007 - 9:25am

Moved

Moved from Leaf Beetles.

… Jim McClarin, 26 September, 2006 - 6:12pm

not Diabrotica undecempunctata

yes they both are the same species. Looks very similar to Diabrotica undecimpunctata indeed. There is a lot of extra black on the elytra of these beetles and also the first articles of the antenna are black and not yellow. This is an other genus however. On the other specimen you can see the third article being much longer than the second. So not Diabrotica; but something else closeby....
You can put in in Galerucinae

… Rob Westerduijn, 26 September, 2006 - 12:16pm

Antennal blow-up

Hi Rob,
Would you mind taking a look at this image I've just added to the other set of photos to see if I did it correctly?

… Jim McClarin, 26 September, 2006 - 7:41pm

yep that´s it

yep that´s it....your other new leafbeetles look interesting as well. Good going!

… Rob Westerduijn, 27 September, 2006 - 8:32am

Thank you, Rob.

I'll put this at subfamily for now.

… Jim McClarin, 26 September, 2006 - 5:59pm