Table 5.

Results of phylogenetic analyses using the three data matrices, including constraints applied to A. altus. Number of steps values for EIW analyses rounded to one decimal place.

data matrix	constraint	EQW		EIW
		MPTs	steps	MPTs	steps
Mannion et al. [50]	none	22 704	2551	735	133.5
Mannion et al. [50]	Diplodocidae	163 056	2552	735	133.7
Mannion et al. [50]	Apatosaurinae	163 056	2555	735	133.8
Mannion et al. [50]	Diplodocinae	163 056	2555	735	133.8
Mannion et al. [50]	Diplodocus as sister taxon	163 056	2557	735	133.9
Whitlock & Wilson Mantilla [7]	none	24	361	12	12.7
Whitlock & Wilson Mantilla [7]	Diplodocidae	4	361	4	12.8
Whitlock & Wilson Mantilla [7]	Apatosaurinae	4	362	4	12.9
Whitlock & Wilson Mantilla [7]	Diplodocinae	12	362	12	12.9
Whitlock & Wilson Mantilla [7]	Diplodocus as sister taxon	4	363	4	13.0
Xu et al. [92]	none	60	1632	6	88.2
Xu et al. [92]	Apatosaurinae	120	1633	N/A	N/A
Xu et al. [92]	Diplodocinae	N/A	N/A	6	88.2
Xu et al. [92]	Diplodocus as sister taxon	60	1635	6	88.3
Xu et al. [92]	sister taxon of other flagellicaudatans	442	1634	6	88.3
Xu et al. [92]	non-diplodocimorph diplodocoid	175	1639	3	88.5