Dicranurus

Dicranurus (Greek, 'dikranon', a pitchfork, and 'oura', tail) is a genus of Lower to Middle Devonian odontopleurid trilobites that lived in a shallow sea that lay between Euramerica and Gondwana, corresponding to modern-day Oklahoma and New York, and Morocco, respectively. As such, their fossils are found in New York, Oklahoma, and Morocco. Their bodies averaged about 1 in (25 mm) or so, in length, though their large spines made them at least 2 in (51 mm) in length. Such tremendous spines are speculated to have hampered the ability of predators, such as arthrodire placoderms, to attack them, and to help prevent them from sinking into the soft mud of their environment. Dicranurus trilobites are distinguished from other odontopleurids by the pair of large, curled, horn-like spines that emanate from behind the glabellum. The genus name refers to these distinctive horns, in fact.

Dicranurus Temporal range: Pragian–Emsian PreꞒ Ꞓ O S D C P T J K Pg N
Dicranurus hamatus elegantus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Odontopleurida
Family:	Odontopleuridae
Genus:	Dicranurus Conrad, 1841
species
D. hamatus D. elegans D. monstrosus

Dicranurus monstrosus

In popular culture

• Dicranurus was an inspiration for an early version of an alien creature from the 2012 movie Prometheus. While the final design does not look much like Dicranurus, the creature is still referred to as "trilobite" due to its inspiration.^[1]

External links

• Description of Haragan Formation, Oklahoma
• Fossil Mall's description of D. elegans
• Fossil Mall's description of D. hamatus
• Fossil Museum's description of D. monstrosus