Which chemical secretions are attributed to the strong, lemon-like scent found in the European species *Hylaeus prosopis*?
Answer
Neral and geranial from mandibular gland secretions
The classification of the European species *Hylaeus prosopis* involves considerations beyond traditional morphology or geography; chemical ecology plays a role in defining its profile. This species is uniquely characterized by emitting a very strong scent, often described as lemon-like. This distinct aroma is directly attributed to specific chemical compounds originating from its mandibular glands. These compounds are identified as neral and geranial. While the exact function is not definitively stated as universal, it is suggested that these secretions might function as either a defensive chemical mechanism or as a form of social pheromone within the species' context.
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