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The wing venation patterns to identify single tsetse flies.

D Kaba¹, D Berté¹, B T D Ta¹

¹INSP/IPR Bouaké, Côte d'Ivoire.

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|October 22, 2016

Summary

Geometric morphometrics effectively identifies tsetse fly species, crucial vectors of trypanosomiases. The contour technique offers the highest accuracy for morphological diagnostics, aiding disease control efforts.

Keywords:

Digital data bank Glossina Landmarks Outlines Semilandmarks Sleeping sickness

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Published on: January 24, 2018

Area of Science:

Entomology
Parasitology
Biometrics

Background:

Tsetse flies are vectors for human and animal trypanosomiases in sub-Saharan Africa.
Accurate morphological identification of tsetse species is vital for disease control strategies.
Geometric morphometrics offers advanced tools for biological shape analysis.

Purpose of the Study:

To evaluate geometric morphometrics methods for tsetse fly species identification.
To compare the efficacy of landmarks, semilandmarks, and outlines techniques.
To propose adapted identification strategies for different regions and Glossina fauna.

Main Methods:

Comparison of landmarks, semilandmarks, and outlines on male and female tsetse wings.
Analysis of 7 Glossina taxa, including major vectors of sleeping sickness and animal trypanosomiases.
Statistical evaluation of species recognition accuracy for each method.

Main Results:

Satisfactory average species recognition rates using wing shape analysis.
The contour technique achieved the highest correct assignment rates (96% females, 92% males).
Semilandmarks and landmarks also provided high accuracy, with slightly lower scores.

Conclusions:

Geometric morphometrics, particularly the contour technique, is a reliable method for tsetse species identification.
Freely available wing images and standardized analytical steps can facilitate identification of unknown specimens.
This approach can support disease surveillance and control programs across Africa.