tracheal gill

tracheal gill

the TRACHEA (2) of aquatic insects formed by slender outgrowths of the body into which TRACHEOLES project.
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Body is campodeiformes; antennae evident; compound eyes; thoracic segments with rudimentary wings; each leg with single claw on its termination; 6 pairs of plate like abdominal tracheal gills; 8 abdominal segments, terminating to two long, multi-articulated and covered with micro-bristles and one short middle anal cerci without bristles (Fig.
Las claves para inmaduros y adultos presentan en algunos puntos dilemas que hacen ver que no es facil la separacion de los grandes grupos de insectos, como el uso de los fatidicos "Not exactly fitting the preceding description", "Free living ....", o "Aquatic, often with tracheal gills".