Morphometric Wing Characters as a Tool for Mosquito Identification.

Area of Science:

• Entomology
• Vector Biology
• Geometric Morphometrics

Background:

• Mosquitoes transmit diseases affecting billions globally, necessitating precise species identification for epidemiological understanding.
• Traditional morphological keys struggle to differentiate cryptic and sibling mosquito species, impacting disease transmission studies.
• Geometric morphometrics presents a promising alternative for identifying vector mosquitoes, including difficult-to-distinguish species.

Purpose of the Study:

• To evaluate the efficacy of wing geometric morphometrics for accurately identifying mosquito species within three key genera: Aedes, Anopheles, and Culex.
• To assess the method's capability in distinguishing species, subgenera, and genera based on wing shape variations.

Main Methods:

• Collected and morphologically identified twelve mosquito species from Aedes, Anopheles, and Culex genera.
• Digitized 18 landmarks on the right wings of adult female mosquitoes to capture wing shape data.
• Applied canonical variate analysis, thin-plate splines, and cross-validated reclassification tests to analyze wing shape data.

Main Results:

• Canonical variate analysis clearly separated the three mosquito genera (Aedes, Anopheles, Culex) based on wing shape.
• Cross-validated reclassification achieved over 99% accuracy for genera, 96% for subgenera, and 100% accuracy in 88 comparisons for species.
• Wing geometric morphometrics demonstrated high efficiency in distinguishing mosquito species and subgenera, confirming its utility.

Conclusions:

• Wing geometric morphometrics is a highly accurate and reliable method for identifying mosquito species, including cryptic and sibling groups.
• This technique effectively distinguishes between Aedes, Anopheles, and Culex genera, as well as their lower taxonomic levels.
• The findings support the use of wing morphometrics as a valuable tool in entomology and vector-borne disease research.