Tanaoceridae
Rehn, 1948
desert long-horned grasshoppers
Tanaoceridae is a small of comprising two , Mohavacris and Tanaocerus. These are notable for their exceptionally long, thread-like that equal or exceed body length, a trait unusual among that can cause confusion with (). They are , winter-active insects of arid regions, with (wingless) bodies and cryptic coloration adapted to desert environments.
Pronunciation
How to pronounce Tanaoceridae: /ˌtænəʊˈsɛrɪdiː/
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Identification
Distinguished from other by length equal to or exceeding body length, resembling . The short, thick antennal combined with long, thin segments is diagnostic. Winglessness and /winter activity pattern further separate them from most . Mohavacris are bark-mimics on Artemisia shrubs; Tanaocerus species occur both on shrubs and ground.
Images
Appearance
Slender to -sized with powerful jumping hind legs. Grey-spotted coloration providing . thin and at least as long as the body; the two innermost joints are short and thick, with remaining joints long and thin. round and protruding. small with collared . absent ().
Habitat
Arid and semi-arid regions, specifically dry areas of the southwestern United States and northwestern Mexico. Associated with desert scrub vegetation, particularly wormwood shrubs (Artemisia spp., 'sagebrush') for Mohavacris; Tanaocerus occupies both shrubs and ground substrates.
Distribution
Southwestern North America: California, Nevada (United States), and northwestern Mexico.
Seasonality
Active during winter months when temperatures are relatively cool; activity pattern.
Host Associations
- Artemisia spp. - Mohavacris timberlakei found on wormwood shrubs where camouflaged as bark
Life Cycle
probably laid in ground; hatching occurs in autumn.
Behavior
activity; winter-active when temperatures are cool. Mohavacris remain motionless on shrubs, relying on bark- . Both possess powerful jumping ability despite small size.
Ecological Role
Herbivorous component of desert ; base for .
Similar Taxa
- Ensifera (crickets/katydids)Similar long , but distinguished by antennal structure, jumping leg , and other characteristics
- Other Caelifera familiesTanaoceridae uniquely combines long with aptery, /winter activity, and specific antennal proportions
More Details
Taxonomic position
Tanaoceridae is the sole in the superfamily , reflecting its isolated phylogenetic position within .
Genera
contains two : Mohavacris Rehn, 1948 and Tanaocerus Bruner, 1906 ( Tanaocerus koebelei).