Ask the ChatbotGames & QuizzesHistory & SocietyScience & TechBiographiesAnimals & NatureGeography & TravelArts & CultureProConMoneyVideos
polygnathiform
Table of Contents
Introduction References & Edit History Related Topics
Read Next
Skeleton fossil record of ancient reptiles in stone.
Do Fossil Fuels Really Come from Fossils?
Discover
pyramid sunset, egypt
What’s Inside the Great Pyramid?
Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.
12 Greek Gods and Goddesses
The Colosseum, Rome, Italy. Giant amphitheatre built in Rome under the Flavian emperors. (ancient architecture; architectural ruins)
New Seven Wonders of the World
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
Adolf Hitler (Nazi, nazism, German leader).
9 Things You Might Not Know About Adolf Hitler
Close-up of crocodile eye; location unknown (rainforest, reptile).
What’s the Difference Between Alligators and Crocodiles?
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement

polygnathiform

paleontology
External Websites
Written and fact-checked by
The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
The Editors of Encyclopaedia Britannica
Article History
Related Topics:
conodont
Polygnathus
See all related content

polygnathiform, conodont, or small toothlike fossil of uncertain relationship found widely in ancient marine rocks, that resembles or may be derived from the genus Polygnathus, a genus found in rocks of Early Devonian to Early Carboniferous age (the Devonian Period lasted from 408 to 360 million years ago and was followed by the Carboniferous Period). Polygnathus is clearly a key conodont genus; from this form a wide variety of distinct conodont genera evolved, including many forms that are important index, or guide, fossils.

Britannica Chatbot logo

Britannica Chatbot

Chatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.