Origin of the domestic dog or the result of natural introgression as the dog expanded across Eurasia. In 2018, a study found a small amount of dog ancestry in 62% of Eurasian wolf specimens looked at, that hybridization had occurred across a wide number of timescales and not just recently, however in contrast there was almost no admixture detected in the North American specimens. There was introgression of the male dog into the wolf, but also one hybrid detected which was the result of a male wolf crossed with a female dog. Wolves have maintained their phenotype differences from the dog, which indicates low-frequency hybridization.
Dog anatomy of Fibula Metatarsals: Talus, Calcaneus, Trochlear Ridges, Central Tarsal Bone, First, Second, and Third Tarsal Bones Vertebra Body, Pedicles, Laminae, Spinous Process, Transverse Process (Wings), Articular Process, Vertebral Foramen, Intervertebral Foramina, Atlas (C1), Axis (C2), dens, Ventral Lamina (on C6) Pelvis: Acetabulum, Ilium, Ischium, Pubis Skull In 1986, a study of skull morphology found that the domestic dog is morphologically distinct from all other canids except the wolf-like canids. "The difference in size and proportion between some breeds are as great as those between any wild genera, but all dogs are clearly members of the same species." In 2010, a