[Junior]

I read the chart as archy being younger than sino (it comes after the latter on the chart). 'Course, it would be nice if there were dates there, but the number sequence seems to bear me out.

[AndrewC]

I read the chart as archy being younger than sino (it comes after the latter on the chart).

And as I said the fossil evidence shows Archie as a Tithonian fossil and the Sinosauropteryx as a middle Barremian

Age estimates are in millions of years ago (Mega anna, or Ma). Margin of error is in millions of years to two standard deviations.

Era	Period	Epoch		Age	End	Error
Cenozoic					0	0
Mesozoic	Cretaceous	Late	Senonian	Maastrichtian	65.0	0.1
				Campanian	71.0	0.5
				Santonian	83.5	0.5
				Coniacian	85.8	0.5
			Gallic	Turonian	89.9	0.5
				Cenomanian	93.5	0.2
		Early		Albian	98.9	0.6
				Aptian	112.2	1.1
				Barremian	121.0	1.4
			Neocomian	Hauterivian	127.0	1.6
				Valanginian	132.0	1.9
				Berriasian	137.0	2.2
	Jurassic	Late	Malm	Tithonian	144.2	2.6
				Kimmeridgian	150.7	3.0
				Oxfordian	154.1	3.2