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incompertus is local to Australia, and has been confirmed to be found in various places around New South Wales. Unlike most ambrosia beetles, it infests healthy, undamaged trees. incompertus in most of them, including: Eucalyptus baxteri, E. Host trees Īn assessment done by the United States Department of Agriculture (USDA) on unprocessed logs and chips of 18 woody-plant species from Australia discovered A. Fertilized females begin tunneling into trees in the autumn and take about seven months to penetrate 50 to 80 mm deep to lay their eggs. incompertus and the specific manner in which the species acquires fungal spores for transport have been studied and compared with the mechanisms used by other ambrosia beetles.
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New colonies are founded by fertilized females that use special structures called mycangia to transport fungi to a new host tree. They excavate tunnels in living trees in which they cultivate fungal gardens as their sole source of nutrition. incompertus lives in nutritional symbiosis with ambrosia fungi. Females have elytral declivity adapted for cleaning of galleries and defense. The adult has an elongated, cylindrical body typical of other platypodines, and displays sexual dimorphism, with males being the significantly smaller sex, an atypical arrangement among platypodine beetles. It then pupates and emerges as an adult - 6 mm long and 2 mm wide. It develops through five instars and its head grows from around 0.3 mm wide in the first instar to 0.9 mm wide in the fifth instar. incompertus is about 0.7 mm in length and 0.45 mm wide. 4.2.1 Hypotheses for evolution of eusociality.