DongGyeongi (DG) and X-ray of DG’s tail. (a) shows the general appearance of DG. (b i) The tail length of 2 coccygeal bones can be observed from the Fig. (b ii) is the tail of a short tail sample. The tail length of 5 coccygeal bones can be observed in the figure. The samples shown in this figure are not used in this study, but they represent the common characteristic tail length for no tail and short tail groups. *Gyeongju dog DongGyeongi BaekGu (the name of the owner: Korean Gyeongju DongGyeong Dog Association Co.)’, by ‘ Korean Gyeongju DongGyeong Dog Association Co.’ in 2012 under Type 1 license of the KOGL. This item can be downloaded free in ‘Cultural Heritage Administration.