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Seaside Grasshopper (Trimerotropis maritima)
Photo#349931
Copyright © 2009
Philip Kline
Trimerotropis species -
Trimerotropis maritima
-
Aravaipa Canyon East - Nature Conservancy Property, Graham County, Arizona, USA
October 26, 2009
Size: Large (c. 2")
I think this could be Pallidipennis. It had yellow wings, but it also has orange tarsi, rather than yellow, and looks awfully dull.
Images of this individual:
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Contributed by
Philip Kline
on 7 November, 2009 - 3:45pm
Last updated 26 January, 2010 - 9:10pm
Gave up on subspecies citrina, and dumped it
as undefinable. It can't be distinguished in any reliable way, and most Entomologists are treating it as an absolute synonym now anyway. I was a die-hard, but have been trying to sort eastern specimens to one ssp. or the other, and it can't be done. Specimens from the same location come out to both. Only along the Atlantic coastal strand and Great Lakes shore do "typical"
T. maritima
seem to be constsistently recognizable (almost). And this one - it could pass as a typical
maritima
from the north Atlantic coast! (except the hind tibiae are red instead of yellow).
…
David J. Ferguson
, 26 January, 2010 - 9:10pm
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I'm comfortable
with calling it
citrina
. So, I'll take the plung :o)
Moved from
Trimerotropis
.
…
David J. Ferguson
, 9 November, 2009 - 12:00pm
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Thanks David
If I'm out there again in the Fall, I'll try to capture one for some wing shots.
…
Philip Kline
, 9 November, 2009 - 12:46pm
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gee, you were too fast
I didn't get a chance to fix "plung" - :>/
Wing shots would be great.
…
David J. Ferguson
, 9 November, 2009 - 2:39pm
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Moved
Moved from
Pallid-winged Grasshopper
.
…
Philip Kline
, 9 November, 2009 - 11:21am
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Several possibilities come to mind,
but most are based on "perhaps" sort of reasoning. Im actually pretty sure that this girl is
Trimerotropis maritima citrina
. I've never been able to verify this species from Arizona (at least not to my satisfaction), though it has been recorded from the state (dubiously). Tinkham published some photos from north of the rim that look to be
T. maritima
(calling them
T. latifasciata
as I recall), but I've not seen the specimens themselves yet, and they could be something else.
T. maritima
is common along the Rio Grande, Pecos, and up some of their tributaries in New Mexico (and maybe still - definitely formerly - along the upper San Juan River valley). Since it is a powerful flyer and wide-ranging species, it's not too hard to accept that this could be
T. maritima
even from so far west. Seeing the wings would help nail it down for sure.
Records of its occurrence in Wyoming and Colorado were "pooh-poohed" for a period of several decades, and many specimens so-named were wrongly identified, but it turns out that it really does enter both states along the Platte and Arkansas drainages.
Other possibilities for yours would involve this being an oddly colored individual of some other species, in which the dark pronotal cross bands are not developed normally. However, the shape of the pronotum and the proportions don't favor any of these other species (size would make
T. californica
,
T. melanoptera
or
T. latifasciata
the only other likely candidates).
Just out of curiousity, was it found in a sandy area? That would also favor it being
T. maritima
. The species is usually found in fairly extensive sandy areas near or along water courses (at least in the Great Plains and westward). I see a Willow leaf, which is a common associate of the species.
…
David J. Ferguson
, 8 November, 2009 - 1:41pm
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Habitat
Thanks for the detailed information David. I found it on a sandy gravel bar alongside the flowing Aravaipa Creek, so it certainly was along a watercourse. It was in an area with wide mixed sand and gravel along the side of the creek where a flood a couple of years ago had scoured out the vegetation for at least 30-40 feet on either side of the creek.
…
Philip Kline
, 8 November, 2009 - 11:08pm
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Absolutely perfect habitat
for
T. maritima citrina
.
…
David J. Ferguson
, 9 November, 2009 - 11:05am
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Something else.
This is something else, but probably still a
Trimerotropis
. You seem to have a knack for getting unique species, Philip:-) I hope Dave Ferguson knows this one....
…
Eric R. Eaton
, 7 November, 2009 - 8:09pm
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