Main Page | See live article | Alphabetical index Graptolites (Graptolita) are colonial animals known from the Upper Cambrian through the Mississippian. Possibly hemichordates. A possible graptolite, Chaunograptus, is known from the Middle Cambrian. Any information on graptolite exhibitions at natural history museums? This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.