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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Longhorn Beetles (Cerambycidae) » Cerambycinae » Trachyderini » Trachyderina » Tragidion » Tragidion densiventre
Photo#149803
Tragidion - Tragidion densiventre - male - female
Copyright © 2007 margarethe brummermann

Tragidion - Tragidion densiventre - Male Female
Lower Madera Canyon grassland, Pima County, Arizona, USA
September 20, 2007
When these guys flew, the looked very much like the Hemipepsis, and even when they landed they kept their wings up for a while, just like a wasp.
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Contributed by margarethe brummermann on 2 October, 2007 - 8:13pm
Last updated 27 January, 2009 - 6:15pm

Moved
Moved from Tragidion deceptum.
… margarethe brummermann, 27 January, 2009 - 6:15pm login or register to post comments

Hard to say for sure...
...but the narrow black basal band of the elytra suggest Tragidion densiventre. This species occurs in lower desert habitats, while T. deceptum occurs at higher montane elevations, although the two species can co-occur (even feeding on the same shrubs) in zones of contact.
… Ted C. MacRae, 27 January, 2009 - 2:32pm login or register to post comments

Moved
Moved from Tragidion annulatum.
… margarethe brummermann, 27 January, 2009 - 1:37pm login or register to post comments

humm..
Hopefully one of the better Cerambycid folks can verify, but the bi-colored antenna doesn't say Tragidion to me. At first glance I thought Trachyderes, but ... that doesn't really match from what I can see, unless its one of the ssp. of mandibularis, like T. m. reductus Casey, 1912:316.
… Phillip Harpootlian, 3 October, 2007 - 9:06am login or register to post comments

 
This photo
was just meant to show how many big guys there were in every ooozing Desert Broom. It also ilustrates that the mating Tragidions seemed to attracked more of the same - pherhormones I guess. Although there were Trachyderes, too, in a neighboring bush, there aren't any in this shot. I've collected specimen of the big Tragidion males with bicolored antenna, and I'll add a clearly identifiable picture to this more scenic one. Maybe I'll find someone to tackle the species (:
… margarethe brummermann, 3 October, 2007 - 9:22am login or register to post comments

 
OK - looks like T. annulatum
the latest checklist suggests three possible sp. of Tragidion from AZ;

T. annulatum LeConte 1858:83 - actually looks like a good match
T. armatum armatum LeConte 1858:25
T. auripenne Casey 1893:586 - no image found - possibly?
… Phillip Harpootlian, 3 October, 2007 - 9:27am login or register to post comments

 
Tragidion annulatum
looks really good! Thanks!
… margarethe brummermann, 3 October, 2007 - 2:11pm login or register to post comments

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