Abstract—Variations in the patterns of asymmetry in coconut leaf beetle Brontispa longissima metasternum from ten (10) populations in Northern Mindanao, Philippines were evaluated using the landmark-based advanced geometric morphometrics Symmetry and Asymmetry in Geometric Data (SAGE) version 1.04 tool. Coconut leaf beetle has been infesting the country. However, primary information to the pest’s ability to develop traits efficiently is still to be investigated. B. longissima metasternum was digitized and analyzed using Procrustes Analysis of Variance (ANOVA). Results have shown absence of fluctuating asymmetry between sexes and locations. Conversely, directional asymmetry and individual shape variation is evident for male and female samples in all sites.

Index Terms—Brontispa longissima, asymmetry, metasternum, procrustes ANOVA.

D. P. Genotiva is with the School of Graduate Studies - Mindanao State University at Iligan City 9200 Philippines (e-mail: debbiegenotiva@gmail.com).
S. R. M. Tabugo, M. M. E. Manting, and C. G. Demayo are with the Department of Biological Sciences in Mindanao State University – Iligan Institute Technology, Iligan, Philippines 9200 (e-mail: sharonrose0297@gmail.com, muhminmichael.manting@gmail.com, cgdemayo@gmail.com).
J. M. Gorospe is with the School of Graduate Studies at the Naawan Campus of the Mindanao State University system.
E. M. Sabado is with the Plant Science Department, COA, MSU-Marawi, Marawi City, Philippines (e-mail: emcsab@yahoo.com).

Cite: Debbie Gail P. Genotiva, Sharon Rose M. Tabugo, Muhmin Michael E. Manting, Jessie G. Gorospe, Emma M. Sabado, and Cesar G. Demayo, "Asymmetry Analysis of Brontispa longissima Gestro, 1885 (Coleoptera: Chrysomelidae) Metasternum Using Symmetry and Asymmetry on Geometric Data (SAGE)," International Journal of Bioscience, Biochemistry and Bioinformatics vol. 4, no. 5, pp. 412-418, 2014.