Dimorphic Olfactory Lobes in the Arthropoda

Authors


Address for correspondence: Prof. Nicholas Strausfeld, University of Arizona – Division of Neurobiology, 611 Gould-Simpson Bldg Tucson AZ 85721. Voice: 520 621 8382; fax: 520 621 8282. flybrain@neurobio.arizona.edu

Abstract

Specialized olfactory lobe glomeruli relating to sexual or caste differences have been observed in at least five orders of insects, suggesting an early appearance of this trait in insect evolution. Dimorphism is not limited to nocturnal species, but occurs even in insects that are known to use vision for courtship. Other than a single description, there is no evidence for similar structures occurring in the Crustacea, suggesting that the evolution of dimorphic olfactory systems may typify terrestrial arthropods.

Ancillary