Gomphostrobus Directory References Discover 9 U.S. Presidents with the Most Vetoes Falling Stars: 10 of the Most Famous Endangered Species The Disappearance of Amelia Earhart 7 of History's Most Notorious Serial Killers Why Do Some Cicadas Appear Only Every 17 Years? 7 Deadliest Weapons in History 6 Animals We Ate Into Extinction Contents Ask the Chatbot a Question Gomphostrobus paleontology Ask the Chatbot a Question Learn about this topic in these articles:feature of Lebachia In Lebachia…as detached fossils, are called Gomphostrobus) at the ends of the side branches.Read More Britannica ChatbotChatbot 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.