First records of Stephanorhinus kirchbergensis (Jäger, 1839) (Mammalia, Rhinocerotidae) from the Kuznetsk Basin (Kemerovo region, Kuzbass area, South-East of Western Siberia)

An absolutely unique peculiarity is represented, on the third upper molar from Mokhovo, by the
supplementary conus which ex abrupto distally interrupts the ectometaloph (on the third upper molar of all rhinoceroses - Coelodonta antiquitatis excluded - ectoloph and metaloph form an unique ensemble, the ectometaloph) testifying a genetic anomaly which may be considered as unique in its kind.