The calcaneus present dorsal articular surfaces for the talus, called the talar articular surfaces. In carnivores and horses, these surfaces are separated in two parts by a proximodistal groove called the calcaneal sulcus. The tarsal sinus is the space between the talus and calcaneus, in front of the calcaneal sulcus.
Text by Antoine Micheau, MD - Copyright IMAIOS
Veterinary Anatomy of Domestic Mammals: Textbook and Colour Atlas, Sixth Edition - Horst Erich König, Hans-Georg Liebich - Schattauer - ISBN-13: 978-3794528332
Illustrated Veterinary Anatomical Nomenclature - 3rd edittion - Gheorghe M. Constantinescu, Oskar Schaller - Enke