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The honeybee, Apis mellifera, has been the most important insect species for the study of social behaviour. With the recent release of its genome sequence, the honeybee has emerged as an excellent model for molecular studies of social behaviour. A key feature of eusocial species is a complex division of labour. Adult honeybees perform a series of tasks in the hive when they are young and then shift...
Three flexor muscles of the posterior tentacles of the snail Helix pomatia have recently been described. Here, we identify their local motor neurons by following the retrograde transport of neurobiotin injected into these muscles. The mostly unipolar motor neurons (15–35 µm) are confined to the tentacle digits and send motor axons to the M2 and M3 muscles. Electron microscopy revealed small dark neurons...
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