Details - A revision of the fossil genus Knightia, with a description of a new genus from the Green River Formation (Teleostei, Clupeidae)

A revision of the fossil genus Knightia, with a description of a new genus from the Green River Formation (Teleostei, Clupeidae)

Title

A revision of the fossil genus Knightia, with a description of a new genus from the Green River Formation (Teleostei, Clupeidae)

By

Grande, Lance

Type

Book

Material

Published material

Publication info

New York, N.Y, American Museum of Natural History, c1982

Notes

Title from caption.

"June 7, 1982."

In title "Knightia" is preceded by a dagger.

"The fossil genus ýKnightia is revised; ýK. eocaena Jordan, 1907, and ýK. alta (Leidy, 1873) are redescribed, and ýK. vetusta, new species, is described from the Middle Paleocene Tongue River Formation of southeastern Montana. ýKnightia is placed in the Pellonulinae. It was found that the known geologic range of ýKnightia is Middle Paleocene to Middle Eocene and its geographic distribution appears to be western North American, or possibly Pacific continental (western United States and possibly China). ýKnightia is known only from deposits of probable freshwater origin. A new clupeid genus, ýGosiutichthys, is described from early Middle Eocene deposits of the Green River Formation in Wyoming. ýGosiutichthys parvus, new species, is a small herring that, unlike ýKnightia (the other Green River clupeid), has two supramaxillary bones, thin transparent scales, and several other differentiating characters. The interrelationships of ýG. parvus with other clupeids are not known, but it is placed provisionally in the poorly defined subfamily Clupeinae. The presence of two supramaxillary bones prevents its placement in Pellonulinae as the subfamily is currently defined"--P. [1].