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RESEARCH PRODUCT

Die digitiformen Sensillen auf dem Maxillarpalpus von Coleoptera

G. W. GuseK. Honomichl

subject

Distal segmentsense organsCell BiologyPlant ScienceGeneral MedicineLymphAnatomyrespiratory systemBiologySensory cellProcess (anatomy)SensillumElectron microscopic

description

The digitiform sensilla on the distal segment of the maxillar palps ofAgabus bipustulatus (L.) andHydrobius fuscipes (L.) were investigated by electron microscopic methods. Each sensillum is innervated by a single bipolar sensory cell. The sensilla ofHydrobius are associated with three enveloping cells, which enclose an inner and outer receptor lymph cavity. A single enveloping cell only is found in the completely differentiated sensilla ofAgabus. These sensilla do not form an outer lymph cavity. The area beneath the hair base is filled by the distal process of the enveloping cell and by extensions of epidermal cells. Only one extra-cellular space exists, which seems to be homologous to an inner receptor lymph cavity.

https://doi.org/10.1007/bf01276741