Fossil range: Late Cretaceous
| Scientific classification
Diclonius (meaning "double sprout") is an extinct genus of hadrosaurid dinosaur from the Late Cretaceous Period. The genus is based solely on the remains of fossilized teeth. Its fossils have been found in North America. The name is in reference to the tooth roots, which are doubled and in contrast to Monoclonius ("single stem"), which Cope named in the same paper.
The type species, Diclonius pentagonus, is a nomen nudum discovered by Cope in 1876. Other formally undescribed species include D. calamarius and D. perangulatus. A "fourth" species has been reclassified as Anatotitan. They are all tooth taxa, known only from teeth and one jaw.
Although Cope referred several other batches of teeth to the genus, under several species, the name is considered a nomen dubium.
- D. calamarius Cope, 1876; teeth
- D. mirabilis (Leidy, 1856) Cope, 1883; included in part with Trachodon mirabilis and Anatotitan copei
- D. perangulatus Cope, 1876; teeth
- Cope, E. D. 1883. The structure and appearance of the Laramie dinosaurian. American Naturalist 37:774-777.
- Coombs, W. 1988. The status of the dinosaurian genus Diclonius and the taxonomic utility of hadrosaurian teeth. Journal of Paleontology 62:812-817.