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Taxonomy

Taxonomy

Taxonomy is the science of defining and naming groups of biological organisms based on shared characteristics. It uses a hierarchy of increasingly inclusive categories with Latin names. The smallest units of taxonomy, species and genus, are used to assign a formal, taxonomic name to each species in a system. This classification system, referred to as binomial nomenclature, was formalized by Carolus Linnaeus in the 18th century.
Hierarchy of Taxonomy
The hierarchy that Carolus Linnaeus first...

Phylogeny

Phylogeny

Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.

Phylogenetic Trees

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.

The Tree of Life - Bacteria, Archaea, Eukaryotes

The Tree of Life - Bacteria, Archaea, Eukaryotes

The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...

Modern Molecular Taxonomy

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...

Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

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Updated: Sep 9, 2025

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

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De uno a cuatro: redefinición de la taxonomía de las jirafas

The Veterinary record

|September 5, 2025

Resumen

Las jirafas ahora son reconocidas como cuatro especies distintas, un cambio significativo con respecto a la clasificación anterior de una sola especie. Esta reclasificación tiene un impacto en los esfuerzos de conservación de estos mamíferos únicos de África.

Área de la Ciencia:

Zoología
Biología de la conservación
La genética

Sus antecedentes:

Las jirafas fueron históricamente clasificadas como una sola especie, Giraffa camelopardalis.
Las investigaciones recientes desafían esta visión taxonómica de larga data.
Comprender la diversidad de especies de jirafas es crucial para una conservación efectiva.

Objetivo del estudio:

Revisar y presentar las conclusiones de un informe sobre la taxonomía de las jirafas.
Para resaltar el reconocimiento oficial de cuatro especies distintas de jirafas.
Para enfatizar las implicaciones de este cambio taxonómico para las estrategias de conservación.

Principales métodos:

Análisis de un informe de la Unión Internacional para la Conservación de la Naturaleza (UICN).

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Revisión de los datos genéticos y morfológicos que apoyan la diferenciación de las especies.

Evaluación del estado de conservación basado en la delimitación de nuevas especies.

Principales resultados:

Reconocimiento oficial de cuatro especies distintas de jirafas.
La clasificación anterior de las jirafas como una sola especie ya está obsoleta.
Cada una de las cuatro especies exhibe características genéticas y geográficas únicas.

Conclusiones:

La reclasificación requiere un enfoque revisado para la conservación de las jirafas.
Se necesitan planes de conservación específicos para cada una de las cuatro especies identificadas.
Se recomienda una mayor investigación sobre la ecología y el comportamiento de cada especie.