Another perspective of the
same camel metapodial (also called a cannon bone) seen in the
previous image; it's from the Late Miocene Dove Spring Formation
of the Ricardo Group, El Paso Mountains, Kern County, California;
in actual size, the specimen is 39 centimeters long (roughly
15 and one-half inches). Identified by Dr. Xiaoming Wang of the
Natural History Museum of Los Angeles County. According to Dr.
Robert Emory (National Museum of Natural History, Smithsonian
Institution), who supplied some additional information, the specimen
is likely from the rear leg, so it is technically a metatarsal.
Dr. Emry says that the metatarsal is "formed of the fusion
of two metatarsals (same as in cattle, deer, etc). At the distal
end (toward the bottom in the image) it divides the separate
ends of the original two metatarsals, and the joint ends are
broken off--this is where the toe bones would articulate. This
bone is between the hock and the ground in ungulates--in you
the metatarsals are betweebn your ankle and your toes." |