Here is a distal (lower)
end of a camel tibia--those grooves on the artiulating surface
connect at the ankle joint with the astragalus; in camels, this
joint is at the hock, well above ground. In humans, this is the
joint that moves in the ankle when the foot moves up and down.
Late Miocene Dove Spring Formation of the Ricardo Group, El Paso
Mountain, Kern County, California; in actual size, the specimen
is 45mm across. Identified by Dr. Xiaoming Wang of the Natural
History Museum of Los Angeles County. Additional information
supplied by Dr. Robert Emry, National Museum Of Natural History,
Smithsonian Institution. |