Two species, Blaps gigas and Pimelia valdani dominate tenebrionid
beetles while Chrysomelidae are represented mainly by Timarcha tenebricosa and beetles by Heliotaurus caeruleus, floricultural species and Tentyria interruptus, xerophilous species and psammophile very abundant in the steppe and desert arid and a varied regime of the same type as that of the Blaps [83,6].
author (Wolfgang Schawaller) nevertheless cautions that a number of current classifications must be considered tentative because of limited observations, insufficient knowledge of ranges, and the confused state of much pre-existing taxonomy.
2003), and 19% of all tenebrionid
species known from the eastern U.
Marino PC (1986) Activity Patterns and Microhabitat Selection in a Desert Tenebrionid
Beetle (Coleoptera: Tenebrionidae).
Linear desiccation rates also have been observed for some tenebrionid
beetles (Renault and Coray 2004).
Neither of the two species unique to Camp Site, Asidina furcata (Champion) and an unidentified tenebrionid, were large components of the survey and are most likely incidental collections.
Ecological factors affecting population sampling of desert tenebrionid beetles.
Seely (1985) listed predators of Namib tenebrionids.
Most species of tenebrionids are restricted to one habitat.
Additionally, Pasimachus elongatus, a carabid beetle that preys on larval and adult tenebrionids (Calkins and Kirk, 1974; Wise, 1985), was often captured beneath shrubs (50%, 41/82 captures) and in cactus (26%, 21/82), and may respond to the same abiotic cues used by darkling beetles or to high prey densities.
Tenebrionid species differ in their tolerance of temperature stress and water loss, feeding preferences and locomotor and burrowing efficiency (Allsopp, 1980; Crawford, 1991).
These beetles were chosen to represent a wide variety of morphologies and habits among the larger adesmiine tenebrionids in the Namib, and because they are found in habitats ranging from the coast to the hot, dry, eastern edge of the Namib.
The evolution of long legs in Onymacris is consistent with the hypothesis that long legs evolve in desert tenebrionids to enhance stilting in the hot desert-interior habitats.
Collectively, detritus and seeds provide food for a wide range of species including termites, ants, crickets, and tenebrionid beetles, accounting for their high biomass and species richness in deserts (Crawford, 1991; Seely, 1991; Sanchez-Pinero and Polis, 2000).
Peaks in abundance of the two tenebrionid beetles appeared to correspond to dry years during 1998-2006.