“Archaeozoologists have struggled to find morphological criteria that allow them to reliably distinguish between the bones of these two closely related taxa”. Zeder and Lapham
In paleontology, and zooarchaeology. Ovicaprids or caprines are domestic sheep and goats put together.
Based from post-cranial skeletal remains. It has historically been difficult to distinguish between them.

Bibliography:
Melinda A. Zeder, Heather A. Lapham, “Assessing the reliability of criteria used to identify postcranial bones in sheep, Ovis, and goats, Capra”, Journal of Archaeological Science 37:2887-2905 (2010) doi:10.1016/j.jas.2010.06.032 (https://doi.org/10.1016%2Fj.jas.2010.06.032)

Michael Buckley, “Zooarchaeology by Mass Spectrometry (ZooMS) Collagen Fingerprinting for the Species Identification of Archaeological Bone Fragments”, p. 227-250 in Christina M. Giovas, Michelle J. LeFebvre, eds., Zooarchaeology in Practice, ISBN 9783319647630