Adults measure 0.00618-0.0134 in (157-340 pm); lack dorsal plates, and the dorsal cuticle varies from smooth to a delicate mammilate sculpture. Large black eyes are always present; mouth opening is subterminal. Stylets are very long with large furcae; stylet supports lacking. Three straight placoids are encrusted with calcium carbonate. All sensory structures are reduced in length. Median cirrus is lacking, minuscule internal and external cirri are located around mouth cone. Key characteristic of genus echiniscoides is presence of numerous claws on the legs. In adults, the number of claws varies from 7-13; fourth pairs of legs have usually one claw less than other legs. All claws smooth and lack spurs.
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