Embaphion contractum
Embaphion contractum is a darkling beetle ( Tenebrionidae) in the Embaphion, a group characterized by their distinctly explanate (flattened and expanded) body form. The is found in arid and semi-arid regions of western North America. Like other tenebrionids, it is primarily and exhibits slow, deliberate movement rather than rapid .
Pronunciation
How to pronounce Embaphion contractum: /ɛmˈbæfiˌɑn kənˈtræktəm/
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Identification
Members of Embaphion are immediately recognizable by their strongly explanate body shape—flattened and expanded laterally, giving a broad, almost disc-like appearance. This distinguishes them from the more cylindrical or convex forms typical of many other darkling beetles. are bead-like (), with segments wider than long. The are concealed beneath the , not exposed forward as in predatory ground beetles. Embaphion contractum specifically can be distinguished from the more commonly encountered E. muricatum by its smoother, less tuberculate or muricate (rough/pimply) elytral surface.
Distribution
Western North America, including New Mexico where it has been recorded from sand dune at Mescalero Sands Recreation Area.
Behavior
; slow-moving, relying on dense for defense rather than rapid escape. Does not exhibit the -standing defensive characteristic of Eleodes and some related .
Similar Taxa
- Embaphion muricatumAlso occurs in sand dune of the southwestern U.S., but distinguished by rougher, more tuberculate elytral surface. E. muricatum was specifically noted as abundant at Mescalero Sands, New Mexico, suggesting sympatry with E. contractum.
- Eleodes spp.Another common darkling beetle in arid western North America, but Eleodes has more cylindrical body form, often exhibits -standing defensive , and lacks the strongly explanate body shape of Embaphion.