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Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)

Sayı: 2026 29 Eylül 2026
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Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)

Öz

Sex-related variation in pronotal form was examined in a Kızılcahamam population of Dorcadion boluense corallinum using landmark-based geometric morphometrics. A total of 80 adults, comprising 30 females and 50 males, were examined using standardized dorsal images of the pronotum. Eight fixed homologous landmarks were digitized. Sexual size dimorphism was evaluated using centroid size, whereas symmetric pronotal shape variation was analyzed through principal component analysis, Procrustes linear models, discriminant function analysis, and morphological disparity comparisons. Females had significantly greater pronotal centroid size than males, with a mean difference of 8.7% and a large effect size. Sex explained 76.79% of symmetric pronotal shape variation. Females showed a broader and more compact pronotum, whereas males exhibited a narrower and more elongate configuration. Although centroid size was significantly associated with shape in the overall regression, this relationship was no longer significant after sex was included in the model, and no difference in allometric slopes was detected between the sexes. Discriminant analysis achieved 100% classification accuracy under leave-one-out cross-validation, while within-sex Procrustes variance did not differ significantly. These findings demonstrate pronounced sexual dimorphism in pronotal size and shape and indicate that the observed shape differentiation primarily reflects sex rather than an independent allometric effect. The results also support the explicit consideration of sex in comparative morphometric studies of Dorcadion.

Anahtar Kelimeler

Allometry, Dorcadion, geometric morphometrics, sexual dimorphism, shape variation

Kaynakça

  1. Adams, D.C., Collyer, M.L., Kaliontzopoulou, A., & Baken, E. (2026). Geomorph: Software for geometric morphometric analyses. R package version 4.1.0. https://cran.r-project.org/package=geomorph
  2. Baken, E.K., Collyer, M.L., Kaliontzopoulou, A., & Adams, D.C. (2021). Geomorph v4.0 and gmShiny: enhanced analytics and a new graphical interface for a comprehensive morphometric experience. Methods in Ecology and Evolution, 12, 2355-2363. https://doi.org/10.1111/2041-210X.13723
  3. Collyer, M.L., & Adams, D.C. (2018). RRPP: An R package for fitting linear models to high-dimensional data using residual randomization. Methods in Ecology and Evolution, 9, 1772-1779. https://doi.org/10.1111/2041- 210X.13029
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  5. Doğan Sarıkaya, A. (2026). Sexual dimorphism in the pronotum and elytra of Dorcadion parilis (Coleoptera: Cerambycidae): evidence from traditional and geometric morphometrics. Insects, 17(8), 760. https://doi.org/10.3390/insects17080760
  6. Doğan Sarıkaya, A., Koçak, Y., & Sarıkaya, Ö. (2020). Sexual dimorphism in the Anatolian endemic tiger beetle, Cephalota circumdata ssp. cappadocica Franzen, 1996 (Coleoptera: Carabidae: Cicindelinae): a study showing the effectiveness of geometric morphometrics. Turkish Journal of Entomology, 44(4), 425-436. https://doi.org/10.16970/entoted.680696
  7. Doğan Sarıkaya, A., & Okutaner, A.Y. (2021). Sexual morphometric variation in pronotum of Dorcadion anatolicum Pic, 1900 (Cerambycidae: Coleoptera). Journal of Anatolian Environmental and Animal Sciences, 6(1), 84-87. https://doi.org/10.35229/jaes.823033
  8. Doğan Sarıkaya, A., Okutaner, A.Y., & Sarıkaya, Ö. (2019). Geometric morphometric analysis of pronotum shape in two isolated populations of Dorcadion anatolicum Pic, 1900 (Coleoptera: Cerambycidae) in Turkey. Turkish Journal of Entomology, 43(3), 263-270. https://doi.org/10.16970/entoted.525860
  9. Eldred, T., Meloro, C., Scholtz, C., Murphy, D., Fincken, K., & Hayward, M. (2016). Does size matter for horny beetles? A geometric morphometric analysis of interspecific and intersexual size and shape variation in Colophon haughtoni Barnard, 1929, and C. kawaii Mizukami, 1997 (Coleoptera: Lucanidae). Organisms Diversity & Evolution, 16(4), 821-833. https://doi.org/10.1007/s13127-016-0289-z
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Kaynak Göster

APA
Doğan Sarıkaya, A. (2026). Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae). Journal of Anatolian Environmental and Animal Sciences, 2026. https://doi.org/10.35229/jaes.2008896
AMA
1.Doğan Sarıkaya A. Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae). Journal of Anatolian Environmental and Animal Sciences. 2026;(2026). doi:10.35229/jaes.2008896
Chicago
Doğan Sarıkaya, Aslı. 2026. “Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)”. Journal of Anatolian Environmental and Animal Sciences, sy 2026. https://doi.org/10.35229/jaes.2008896.
EndNote
Doğan Sarıkaya A (01 Eylül 2026) Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae). Journal of Anatolian Environmental and Animal Sciences 2026
IEEE
[1]A. Doğan Sarıkaya, “Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)”, Journal of Anatolian Environmental and Animal Sciences, sy 2026, Eyl. 2026, doi: 10.35229/jaes.2008896.
ISNAD
Doğan Sarıkaya, Aslı. “Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)”. Journal of Anatolian Environmental and Animal Sciences. 2026 (01 Eylül 2026). https://doi.org/10.35229/jaes.2008896.
JAMA
1.Doğan Sarıkaya A. Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae). Journal of Anatolian Environmental and Animal Sciences. 2026. doi:10.35229/jaes.2008896.
MLA
Doğan Sarıkaya, Aslı. “Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae)”. Journal of Anatolian Environmental and Animal Sciences, sy 2026, Eylül 2026, doi:10.35229/jaes.2008896.
Vancouver
1.Aslı Doğan Sarıkaya. Sex-Related Pronotal Differentiation and Allometry in Dorcadion boluense corallinum (Coleoptera: Cerambycidae). Journal of Anatolian Environmental and Animal Sciences. 01 Eylül 2026;(2026). doi:10.35229/jaes.2008896