Orconectes neglectus Faxon, 1885[5] Faxonius neglectus, a species of freshwater crayfish also known as the ringed crayfish, is native to Central North America, with two major disjunct areas of distribution in the Ozarks and around Nebraska.

[4][6][7] F. neglectus has a uniquely marked decapod anatomy, which includes a wide ring on the rostrum in combination with a dark brown wide ring on the dactyl and propodus of the crayfish's chelipeds, ending in bright red/orange.

[8] Males have been documented to reach maturity within 8 months, but the growth of immature F. n. chaenodactylus is dependent upon temperature fluctuations during this time.

[6] Many of these northern populations were once considered relict populations, but recent work has shown that F. n. neglectus is widespread within the western two thirds of Nebraska and surrounding adjacent drainages, including the basins of the Kansas (mostly the tributaries of the Republican and Big Blue), the Niobrara, and the Platte (including the Loup) rivers.

Where F. neglectus colonizes, the native species, Orconectes eupunctus and Cambarus hubbsi, are no longer present, despite having been previously observed in those areas.