part of part of distal phalanx digit 3 distal phalanx of digit 3 the bottommost bone in the equine leg and is encased by the hoof capsule. The distal phalanx articulates with both the middle phalanx and the distal sesamoid, forming the distal interphalangeal joint[Wikipedia:Coffin_bone] equine distal phalanx digit 3 distal phalanx pedal bone distal phalanx of 3rd digit equine 3rd phalanx of digit 3 UBERON:0014485 medial claw of ruminant hoof 3rd digit distal phalanx SCTID:370666003 SCTID:410030004 third distal phalanx digit III P3 third digit distal phalanx medial ungual phalanx of artiodactyl distal phalanx of third digit medial claw of artiodactyl Wikipedia:Coffin_bone A distal phalanx that is part of a digit 3. In odd-toes ungulates (Perissodactyla e.g. horses) this is called the coffin bone. In even-toed ungulates (Artiodactyla e.g cattle) this is associated with the medial claw. distal phalanx of digit III coffin bone distal phalanx of middle digit SCTID:370671005 digit 3 digitopodial skeleton