Didymograptus
Didymograptus is an extinct genus of graptolites with four rows of cups. They lived during the Middle Ordovician, to Late Ordovician.Distribution
Fossils of Didymograptus have been found in Argentina, Australia, Bolivia, Canada, Chile, China, Colombia, the Czech Republic, Estonia, France, Iran, Morocco, New Zealand, Norway, Peru, Portugal, the Russian Federation, Saudi Arabia, Spain, Sweden, the United Kingdom, the United States, and Venezuela.
