[MM] Sinoconodon rigneyi
The Earliest-Known Stem Mammals
DESCRIBER Patterson & Olson, 1961
TIME Jurassic Early
Sinnemurian
CLASS Mammalia (Linnaeus, 1785)
SUBCLASS Incertea Sedis
ORDER Incertea Sedis
FAMILY Sinoconodontidea (Mills, 1971)
FOSSILSITE Upper Red Beds. Lower Lufeng Formation, Yunnan, China
INFO
Sinoconodon rigneyi (Patterson & Olson, 1961) > Lufengoconodon changchiawaensis (Young, 1982) > Sinoconodon parringtoni (Young, 1982) and Sinoconodon yangi (Zhang & Cui, 1983)
Distinguished by a combination of characters, many of which are primitive among mammals. All specimens of Sinoconodon are from localities in close geographic proximity and at the same stratigraphic level (Stratum 6, Luo & Wu, 1994,1995)