Related Experiment Video
Updated: Aug 3, 2025

Dissection, MicroCT Scanning and Morphometric Analyses of the Baculum
Published on: March 19, 2017
Identification and Distribution of Wedge Clams (Donacidae: Bivalvia) in Thailand by Geometric Morphometric and
Cheewarat Printrakoon1, Sasimanas Unajak2, Javier H Signorelli3
1Animal Systematics and Ecology Specialty Unit (ASESRU), Department of Zoology, Faculty of Science, Kasetsart University, 50 Ngam Wong Wan Road, Chatuchak, Bangkok 10900, Thailand. E-mail: cheewarat.p@ku.th, fscicrp@ku.ac.th (Printrakoon).
Abstract:
The phylogenetic relationship of living Thai Donacidae was herein studied. Two methodologies, geometric morphometrics (GM) and genetic analysis of COI sequences, were combined and applied to identify the valid taxa and explain biodiversity and the distribution pattern in this family. A total of 587 living specimens were tested to analyze the shape and size patterns by Elliptic Fourier Analysis (EFA). Shell identification and GenBank sequences were added to construct the phylogenetic relationship and haplotype network. Centroid size was used to identify the specimens to the subgenus level. Donax (Hecuba) scortum, was easily distinguished from other species by Principal Component analysis (PCA) of shell size and shape. Donax (Dentilatona) incarnatus and Donax (Deltachion) semisulcatus semisulcatus were identified using Canonical Variates Analysis (CVA). Pairwise comparison of EFA was used for species level recognition, particularly shape overlap was observed for medium and small shell size. Based on genetic distance and haplotype network of COI sequences, Donax (Latona) faba and D. (Latona) solidus could be grouped in the same clade. Intraspecific and interspecific genetic data variation of some common species in different geographical localities of Thailand was observed. Three distribution patterns of Donax species were observed along the two-marine system of Thailand.
More Related Videos
10:18A Noninvasive Method For In situ Determination of Mating Success in Female American Lobsters Homarus americanus
Published on: February 7, 2014
15:39Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
Published on: February 28, 2017
Related Concept Videos
Methods of Classification and Identification
Evolutionary Relationships through Genome Comparisons
Applications of Molecular Taxonomy
Modern Molecular Taxonomy