Oxythyrea cinctella’nın (Schaum, 1841) (Coleoptera: Scarabaeidae, Cetoniinae) erkek ve dişi pronotumu arasındaki geometrik morfometriye dayalı morfolojik varyasyonlar

Abstract

Bu çalışmada, pronatal morfolojinin Oxythyrea cinctella (Schaum, 1841)'nın eşeysel dimorfizm tayini üzerindeki faydasını değerlendirmek için pronotum büyüklüğü ve şekli örnek bir özellik olarak kullanılmıştır. Geometrik morfometri ile Ankara ilinden toplanan 85 örnekten (45 dişi, 40 erkek) pronotumun eşeysel boyut ve şekil dimorfizmini analiz ettik. Geometrik morfometrinin sonuçları, pronotumda istatistiksel olarak anlamlı eşeysel boyut ve şekil dimorfizmi olduğunu ortaya koydu. Ayrıca, dişilerin ortalama centroid boyutu erkeklerden önemli ölçüde daha büyüktü. Son olarak, çok değişkenli regresyon sonuçları, boyutun eşeyler arasındaki pronotum şeklindeki farklılaşma üzerinde ihmal edilebilir bir etkiye sahip olduğunu göstermiştir. Burada sunulan sonuçların Oxythyrea böceklerinde eşeysel dimorfizmin daha iyi anlaşılması için yararlı olacağını umuyoruz.

Keywords

• Oxythyrea cinctella
• Scarab kınkanatlısı
• Pronotum
• Landmark temelli morfometri
• Eşeysel dimorfizm

Morphological variations based on geometric morphometrics between male and female pronota of Oxythyrea cinctella (Schaum, 1841) (Coleoptera: Scarabaeidae, Cetoniinae)

Abstract

In this study, pronotum size and shape were used as an exemplar characteristic to evaluate the utility of pronotal morphology on the sexual dimorphism determination of the scarab beetle Oxythyrea cinctella (Schaum, 1841). Using geometric morphometrics, the sexual size and shape dimorphism of pronotum of 85 specimens (45 females, 40 males) collected from Ankara Province (Turkey) were analyzed. Results of geometric morphometrics revealed that there is statistically significant sexual size and shape dimorphism in pronotum. Further, the mean centroid sizes of the females was significantly larger than that of the males. Finally, multivariate regression results indicated that size has negligible influence on the differentiation in pronotum shape between sexes. We hope the results here presented would be helpful for the further understanding of the sexual dimorphism in the beetle genus Oxythyrea.

Keywords

• Oxythyrea cinctella
• Scarab beetle
• Pronotum
• Landmark-based morphometry
• Sexual dimorphism

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