Actaletidae | Article about Actaletidae by The Free Dictionary
A family of insects belonging to the order Collembola characterized by simple tracheal systems.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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VI to anal valves also occurs in Actaletidae
and some members of Isotomidae, indicating that this condition must be developed several times during the evolution of different groups of Collembola.