Sigmocheir furcata is a species of millipede in the family Xystodesmidae.

[1] The species in endemic to California and found in the foothills of the Sierra Nevada mountains.

[1][2] Sigmocheir furcata was described by Rowland M. Shelley in 1995 based on samples collected by R. E. Graham from Williams cave in Calaveras County in 1963.

[2] This species is the northern most representative of the genus being found in the foothills of the Sierra Nevada mountains to the north and south east of Sacramento.

[2] Individuals of the genus have been found in Placer, El Dorado, Amador, Calaveras,and Sacramento, counties.