Hulettia

Hulettia is an extinct genus of ray-finned fish known from the Jurassic of the western United States. This fish genus contains at least one species, H. americana.

Species

The type species, H. americana is originally described as a species of Pholidophorus in 1899. C. R. Eastman. 1899. Jurassic fishes from Black Hills of South Dakota. Geological Society America Bulletin 10:397-408 9/22/14 In 1984, its own genus name Hulettia is given, after Hulett, Wyoming. Holotype is known from Sundance Formation of South Dakota, while other specimens are also known from Wanakah (Summerville) Formation, Todilto Formation and Ralston Creek Formation, which date from the Bathonian to the Oxfordian stages.

Second species, "H". hawesi is described from Morrison Formation of Colorado. This species is named after William Hawes who found the holotype. However, assignment of the species to this genus is questioned in later study, suggesting this species could be a semionotid instead.

H. americana reached their maximum standard length (excluding fins) of , while "H". hawesi is much smaller, with standard length of (about total length).

Classification At 1984, it was classified as Halecostomi incertae sedis. Later study shows that is likely a member of Neopterygii, pan-holostean.

Paleoecology Formations that H. americana known are considered as marine environment, while Morrison Formation where "H". hawesi described shows freshwater environment. Discovered specimens show evidence of predation upon the smaller species of fish Todiltia.http://nmnaturalhistory.org/hulettia.html New Mexico Museum of Natural History, 1999

Hulettia

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