We name species using binomial nomenclature, a universal system that assigns every organism a unique two-part Latin name consisting of its Genus and specific epithet.
If you ask someone what they call a “puma,” “cougar,” “mountain lion,” or “panther,” they might think they are discussing four different animals. They are actually talking about the same cat. This confusion highlights exactly why we need a standardized naming system. Without a strict set of rules for naming organisms, science would struggle to function across borders and languages.
Biologists and taxonomists use a system established centuries ago to ensure accuracy. This method removes ambiguity and creates a universal language for scientists globally. Whether you are studying beetles in Brazil or fungi in France, the scientific name remains constant. Below, we break down the history, the strict rules, and the step-by-step process scientists follow when describing a new discovery.
The Origins of the Binomial System
Before the current system took hold, names for organisms were often long, descriptive Latin phrases known as polynomials. These could change depending on which scientist was writing the description. A simple wild rose might have been called something like “Rosa sylvestris inodora seu canina.” It was clumsy and difficult to memorize.
[Image of Carl Linnaeus]
In the 18th century, Swedish botanist Carl Linnaeus changed biology forever. He introduced binomial nomenclature in his work Systema Naturae. He realized that a unique two-word tag was sufficient to identify a species within a group. This system caught on because of its simplicity and efficiency.
Linnaeus is now known as the father of modern taxonomy. While his classification hierarchy (Kingdom, Phylum, Class, etc.) has been refined with modern genetics, his method of using two names—the Genus and the species—remains the global standard.
How Do We Name Species? The Two-Part Rule
The core of this system is the combination of two distinct parts. Every scientific name is like a first and last name, but in reverse order compared to many human naming customs.
- The Genus (Generic name): This is the first part of the name. It indicates the broader group the organism belongs to. Closely related species share the same Genus. It is always capitalized.
- The Specific Epithet (Species name): This is the second part. It identifies the specific member within that Genus. It is always lowercase.
For example, the domestic dog is named Canis lupus (identifying it as a wolf) with a subspecies tag, or simply Canis familiaris in some contexts. The Genus is Canis (identifying it as a canine), and the specific epithet distinguishes it from Canis latrans (the coyote).
Formatting Scientific Names Correctly
Writing these names requires adherence to specific formatting rules. If these rules are ignored, the name is technically incorrect in scientific literature.
Italics and Underlining: When typed, scientific names are always italicized. If written by hand, they must be underlined to indicate that they should be italicized. For example, you write Homo sapiens on a computer, but underline Homo sapiens in a field notebook.
Abbreviation: After the full name has been mentioned once in a text, the Genus can be abbreviated to its first letter. Tyrannosaurus rex becomes T. rex. This saves space while maintaining clarity.
Who Enforces the Rules?
You cannot simply wake up, find a bug, and name it whatever you want without oversight. There are international governing bodies that maintain the codes of nomenclature. These organizations publish rulebooks that scientists must follow to have a name recognized.
- ICZN: The International Code of Zoological Nomenclature governs the naming of animals.
- ICN: The International Code of Nomenclature for algae, fungi, and plants governs plant life and fungi.
- ICNP: The International Code of Nomenclature of Prokaryotes handles bacteria and archaea.
These codes ensure stability. They prevent two different animals from having the same name (homonyms) and ensure that the oldest valid name usually takes priority (principle of priority).
The Process of Naming a New Discovery
Finding a new species is only the beginning. The process of formally describing and naming it is rigorous and involves several academic steps.
1. Confirming the Discovery
The scientist must verify that the organism is actually new. This involves comparing the specimen against all known related species. They examine physical traits (morphology), behavior, and increasingly, DNA sequences. If the DNA varies significantly from known relatives, it is strong evidence of a new species.
2. Selecting a Holotype
To name a species, you need a physical reference point. Scientists select a single physical specimen to serve as the holotype. This specimen is preserved and deposited in a major museum or research collection. It becomes the “standard bearer” for that name. If future scientists are unsure about the identity of the species, they check the holotype.
3. Choosing a Name
The author has creative freedom here, provided they follow the Latin grammar rules required by the relevant Code. The name must be unique within the Genus. We will discuss the different inspirations for names in the next section.
4. Peer Review and Publication
The name and description must be published in a recognized scientific journal. The paper must include a detailed description of the organism, usually with photos or illustrations, and an explicit statement that it is a new species. Once the paper is published and circulated, the name becomes official.
Where Do the Names Come From?
While the rules are strict, the inspiration for the actual words is quite flexible. Scientists use four main categories when deciding how do we name species effectively.
Descriptive Names
These are the most helpful names for other scientists. They describe a physical characteristic of the organism. For example, the Red Maple is Acer rubrum (rubrum means red). The Blue Whale is Balaenoptera musculus.
Geographical Names
These names indicate where the species was found. This helps with identification in the field. The American Black Bear is Ursus americanus. A dinosaur found in Argentina might be named Argentinosaurus. However, this can be risky if the species is later found in other locations, as the name cannot be changed just because it is geographically inaccurate.
Eponyms (Named After People)
Scientists often honor others by naming species after them. This could be a mentor, a colleague, or a famous figure. For instance, a trapdoor spider was named Aptostichus stephencolberti after comedian Stephen Colbert. Generally, naming a species after yourself is considered bad form and is rarely done.
Latin and Greek Roots
Regardless of the origin, the name must be treated as Latin. This means adding specific suffixes to make the word fit the gender of the Genus. The table below shows common roots used in naming.
| Root Word | Meaning | Example |
|---|---|---|
| Micro- | Small | Microcebus (Mouse lemur) |
| Macro- | Large | Macropus (Kangaroo/Wallaby) |
| Bi- | Two | Biceps (Two-headed muscle) |
| -pterus | Wing | Chiroptera (Bats) |
Why Do Scientific Names Change?
You might notice that scientific names sometimes change in textbooks. This can be frustrating, but it is a sign that science is working. Taxonomy is not static; it evolves as we learn more.
Lumping and Splitting: Sometimes, scientists realize that two animals thought to be different are actually the same. In this case, the names are “lumped,” and the older name takes priority. Conversely, “splitting” happens when genetic analysis reveals that one population is actually two distinct species, requiring a new name for one group.
Transferring Genera: If a species was placed in the wrong family tree based on looks, but DNA proves it belongs elsewhere, it moves to a new Genus. The second part of the name (the epithet) usually travels with it, but the first part changes.
Common Names vs. Scientific Names
While scientific names provide precision, common names offer cultural value. Common names are the vernacular terms used in everyday language (e.g., “Robin”).
The problem with common names is that they are not unique. The “Robin” in the United States (Turdus migratorius) is a completely different bird from the “Robin” in the United Kingdom (Erithacus rubecula). They belong to different families. Scientific names bypass these linguistic hurdles, allowing a Japanese researcher to communicate perfectly with a Brazilian counterpart.
Naming Controversies and Ethics
The naming process is not without drama. There have been instances where names were used to insult other scientists, though the codes of ethics now discourage this. Additionally, there is an ongoing debate about naming species after controversial historical figures. Some scientists advocate for changing names that honor figures associated with colonial violence or racism, while others argue that maintaining stability in the naming record is the priority.
Furthermore, the practice of auctioning off naming rights to fund conservation is gaining popularity. A new orchid or frog might be named after a donor who contributes significantly to the protection of the species’ habitat.
Key Takeaways: How Do We Name Species?
➤ Scientific naming follows binomial nomenclature, pairing a Genus with a specific epithet.
➤ Names must be unique, italicized, and follow Latin grammatical rules.
➤ International codes like the ICZN and ICN strictly govern the naming process.
➤ A physical “holotype” specimen acts as the permanent reference for the name.
➤ Names ensure universal communication across different languages and regions.
Frequently Asked Questions
Can I name a new species after myself?
Technically, the codes of nomenclature do not explicitly ban naming a species after yourself, but it is considered extremely vain and is widely frowned upon in the scientific community. Most scientists choose to honor a mentor, a colleague, or a public figure instead.
What happens if two people name the same species?
This creates synonyms. The Principle of Priority usually applies here. The name that was published and validated first is the accepted scientific name. The later name becomes a junior synonym and is generally retired from use to prevent confusion.
Why are scientific names always in Latin?
Latin was the language of scholarship in the 18th century when Linnaeus developed the system. It is a “dead” language, meaning it does not evolve or change meaning like modern languages. This stability makes it perfect for permanent scientific labels that need to remain constant for centuries.
Can a scientific name be offensive?
The governing codes ask authors to avoid offensive names, but definitions of “offensive” change over time. Some historical names are now viewed as problematic. While the codes focus on stability, there are active debates in the scientific community about whether to rename species with culturally insensitive epithets.
How many species are left to name?
Estimates vary wildly, but scientists believe we have only described about 20% of the species on Earth. While mammals and birds are well-documented, millions of insects, fungi, and deep-sea creatures remain undiscovered and unnamed. The work of taxonomy is far from finished.
Wrapping It Up – How Do We Name Species?
The system of binomial nomenclature acts as the foundation of biological science. By understanding how do we name species, we gain appreciation for the order and precision required to catalog life on Earth. From the early days of Linnaeus to the modern era of genetic sequencing, this naming convention allows us to organize the natural world effectively. Whether descriptive, geographic, or honorary, these names are more than just labels; they are the keys to unlocking the history and relationships of every living thing.