Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Tetragraptus
Table of Contents
Introduction References & Edit History Related Topics
Quizzes
Sea otter (Enhydra lutris), also called great sea otter, rare, completely marine otter of the northern Pacific, usually found in kelp beds. Floats on back. Looks like sea otter laughing. saltwater otters
Animal Group Names
Lion (panthera leo)
Deadliest Animals Quiz
Mute swan with cygnet. (birds)
Match the Baby Animal to Its Mama Quiz
vulture. An adult bearded vulture at a raptor recovery center. The Gypaetus barbatus also known as the Lammergeier or Lammergeyer, is a bird of prey and considered an Old World vulture.
Animal Factoids
Related Questions
Read Next
Malayan Leaf Frog - Megophrys nasuta
9 Animals That Look Like Leaves
Big beaver gnawing on limb at river's edge
6 Animal Species that Mate for Life
Praying mantis (sphodromantis gastrica)
Why Do Some Animals Eat Their Mates After Sex?
animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.
Abundant Animals: The Most Numerous Organisms in the World
Mosquito on human skin.
10 Deadly Animals that Fit in a Breadbox
Discover
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
Close-up of ostriches (Struthio camelus) necks and heads; location unknown.
6 of the World's Most Dangerous Birds
Facsimile of one of William Henry Ireland's forgeries, a primitive self-portrait of William Shakespeare(tinted engraving). Published for Samuel Ireland, Norfolk Street, Strand, December 1, 1795. (W.H. Ireland, forgery)
The Time a Law Clerk Successfully Forged a New Shakespeare Play to Impress His Dad
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Scottish fold cat. A genetic mutation caused (in the original cat-1961) the ears to bend forward and down.
Shorthair Cat Breeds
Saint Lucia Day. Young girl wears Lucia crown (tinsel halo) with candles. Holds Saint Lucia Day currant laced saffron buns (lussekatter or Lucia's cats). Observed December 13 honor virgin martyr Santa Lucia (St. Lucy). Luciadagen, Christmas, Sweden
7 Winter Solstice Celebrations From Around the World
Panama Canal infographic
Timeline and Map of the Panama Canal

Tetragraptus

graptolite genus
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://mainten.top/animal/Tetragraptus
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

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

Tetragraptus, genus of extinct graptolites (colonial animals related to the chordates) that occur as fossils in marine rocks of the Early Ordovician Epoch (505 to 478 million years ago). The genus is a useful guide, or index, fossil for the Early Ordovician; long-distance correlations between rock units are possible employing the many known Tetragraptus species. As its name implies, Tetragraptus is distinguished by its four branches, which are suspended from a thin filamentous support.