Orthoptera Species File (Version 5.0/5.0)
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Characters to separate taxa in Tristiridae

Insects very small, males and females with body length no more than 1 cm and 1,5 cm, respectively
Insects larger, males and females with body length more than 1 cm and 1,5 cm, respectively
Phallic complex with ectophallus strongly sclerotized and ventral sclerite
Phallic complex slightly sclerotized without ventral sclerite
Valves of ovipositor with basivalvular plates not visible externally
Valves of ovipositor with basivalvular plates externally visible
Atacamacris Tristirinae
Source: Cigliano. 1989. Boletín de la Sociedad de Biología de Concepción. 60:51-110
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