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Ironclad Beetle - Zopherus xestus

Ironclad Beetle - Zopherus xestus
Big Bend National Park, Brewster County, Texas, USA
April 3, 2007
Size: 1 inch
I am hoping for some clarification on these beetles. I found this dark Ironclad Beetle in the high Chisos Mountains of Big Bend, among the oak/pine/juniper/cypress forests. It is definately an ironclad, with the distictive striping on its underside (picture 2). Then a few days later found the black and white version (picture 3) on the Edwards Plateau of central TX. Are these the same species? Also, the old Audubon field guide gives a different species name than the one listed for it by Bugguide. Has the species name been changed? I would appreciate any information on this.

Images of this individual: tag all
Ironclad Beetle - Zopherus xestus Ironclad Beetle - Zopherus xestus

Moved from Zopherus.

This appears to be
Zopherus xestus Triplehorn; the holotype is from Big Bend N.P., Basin of the Chisos Mtns. Your ventral image also shows the distinct trilobed callus of the terminal abdominal sternum, which this sp. shares with Z. laevicollis but the latter is from Mexico only. (Reference: Triplehorn, 1972; see INFO page).

Not sure.
In interest of ID Request clean-up, am moving to family page for now. Aside: I wouldn't trust the Audubon guide. It had a few errors to begin with, and is now outdated, too. My own guide is already outdated in some respects, lest you think there might be a conflict of interest:-)

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