Universiteit Leiden

nl en

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.

This website uses cookies.  More information.