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Face fly (Diptera: Muscidae) gynandromorph

J E Cilek¹, F W Knapp

¹Department of Entomology, University of Kentucky, Lexington 40546.

Journal of Medical Entomology

|September 1, 1994

Summary

This study describes adult face fly (Musca autumnalis) gynandromorphs, which exhibit both male and female characteristics. Researchers discuss a potential mechanism for this unusual sexual development in the face fly.

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Area of Science:

Entomology
Zoology
Insect Morphology

Background:

The face fly (Musca autumnalis) is a significant agricultural pest.
Gynandromorphism, the occurrence of both male and female characteristics in a single individual, is a rare phenomenon in insects.
Understanding insect development and sexual differentiation is crucial for pest management strategies.

Purpose of the Study:

To describe and illustrate single specimens of adult Musca autumnalis gynandromorphs.
To investigate the morphological characteristics of these gynandromorphs.
To propose a potential mechanism for gynandromorphism in the face fly.

Main Methods:

Morphological examination of adult Musca autumnalis gynandromorphs.
Description and illustration of external physical characteristics.
Comparison of observed traits with typical male and female morphologies.

Main Results:

All described gynandromorphs possessed male characteristics in the head, specifically a narrow interocular area.
Both dorsal and ventral abdominal aspects displayed color patterns characteristic of both sexes.
Specimens were sourced from both laboratory and field populations.

Conclusions:

The study provides detailed descriptions of Musca autumnalis gynandromorphs, contributing to the understanding of insect sexual development.
The findings highlight the mixed sexual characteristics observed in these specimens.
A potential mechanism for face fly gynandromorphism is discussed, offering insights into developmental biology.

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