Dichograptus (meaning two-branched writing or double-line marks) is an extinct genus of graptolites from the Ordovician.
Dichograptus probably fed on plankton. Individual animals were very tiny, only growing a few millimeters in length (1/8 of an inch).
Distribution Fossils of Dichograptus have been found in Argentina, Chile, China, Colombia (near Caño Cristales, Meta), New Zealand, Norway, and the United Kingdom.Dichograptus at Fossilworks.org
References
Further reading Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 55