Dissertation
The shell evolution of the Hydrocenidae of Malaysian Borneo
The thesis is about the study of shell evolution of the Hydrocenidae of the genus Georissa. This thesis started with a general overview on the evolutionary process of animals due to ecological changes.
- Author
- Bin Khalik, M.Z.
- Date
- 06 October 2021
- Links
- Thesis in Leiden Repository
The thesis is about the study of shell evolution of the Hydrocenidae of the genus Georissa. This thesis started with a general overview on the evolutionary process of animals due to ecological changes. This study has revealed that the Bornean Georissa are more diverse than previously anticipated. I did the taxonomic revision of the genus Georissa, and discussed the morphological features, phylogenetic relationships, and the biogeographic distribution of the genus in Malaysian Borneo. Also, I studied the shell character evolution of the Bornean Georissa in a phylogenetic framework. Based on the phylogeny, I found convergence in the formation of scales. Additionally, I discussed the differentiation of size and coloration of the Bornean Georissa in dependence on different habitats.