Part 2: Types of Taxonomy

Over time, taxonomy evolved from purely morphological classifications to data-driven, molecular methods. Let’s explore the key types:

1. Classical Taxonomy

Based on morphology, anatomy, physiology, and behavior of organisms.

• Strength: Useful for visible traits
• Limitation: May misclassify cryptic or similar-looking species

2. Numerical Taxonomy

Introduced by Sneath and Sokal, this method uses mathematical and statistical techniques to group organisms based on quantifiable traits.

3. Chemotaxonomy

Classification based on chemical constituents (e.g., secondary metabolites, alkaloids).

Common in plant taxonomy

4. Molecular Taxonomy

Uses genetic material (DNA, RNA, proteins) to classify organisms.

• Strength: Highly accurate
• Application: Used in DNA barcoding, phylogenetics, species ID

5. In Silico Taxonomy

A modern extension of molecular taxonomy where analysis is done using bioinformatics tools, databases, and algorithms.

• Involves tools like BLAST, BOLD, MEGA, iTOL
• Efficient, scalable, and useful for large datasets.