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Data on basal deuterostome and calcichordate trees

List of cladograms tested for their correspondence with stratigraphic data. Cladograms are listed alphabetically. For each group, data are listed in order, as follows:

Group name
Tree size (number of terminals)
SRL, Standard range length, the total time represented by known fossil ranges
MIG, Minimum implied gap or 'ghost range'
Gmin, the minimum possible ghost range when cladogram branches are rearranged
Gmax, the maximum possible ghost range when cladogram branches are rearranged
RCI, the Relative completeness index (Benton, 1994)
RCI and GER Sig., significance of the RCI and GER measures
No. consistent nodes, the number of stratigraphically consistent nodes
SCI, the Stratigraphic consistency index (Huelsenbeck, 1994)
SCI Sig., significance of the SCI measure
GER, the Gap excess ratio (Wills, 1999)
Range, the broad stratigraphic range of the cladogram
Reference, the source of the cladogram assessed

Group	No. terminals	SRL	MIG	Gmin	Gmax	RCI	RCI & GER Sig	Consistent nodes	SCI	SCI Sig.	GER	Range of Origins	Reference
Deuterostomia(1)	22	2905	1339	140	1619	53.907057	83	3	0.15	100	0.189317	Camb-Sil	Jefferies, 1986, fig. 9.2
Deuterostomia(2)	10	1742	386	127	556	77.841561	34	3	0.375	80	0.39627	Camb-Ord	Jefferies, 1990, fig. 20
Deuterostomia(3)	17	1313	811	127	1321	38.233054	19	3	0.2	49	0.427136	Camb-Ord	Woods & Jefferies, 1992, fig. 12
Deuterostomia(4)	7	3067	903	450	937	70.557548	44	2	0.4	44	0.069815	Precamb-Jur	Peterson, 1995, fig. 3A
Deuterostomia(4)	7	3067	937	450	937	69.448973	100	1	0.2	97	0	Precamb-Jur	Peterson, 1995, fig. 3B
Deuterostomia(5)	12	3103	1063	450	1473	65.74283	9	5	0.5	15	0.400782	Precamb-Jur	Peterson, 1995, fig. 4A
Deuterostomia(5)	12	3103	1386	450	1473	55.333548	82.5	3	0.3	97	0.085044	Precamb-Jur	Peterson, 1995, fig. 4B
Deuterostomia(5)	12	3103	1063	450	1473	65.74283	7.5	4	0.4	32	0.400782	Precamb-Jur	Peterson, 1995, fig. 5A
Deuterostomia(6)	12	3103	996	450	1473	67.90203	14	4	0.444444	14	0.466276	Precamb-Jur	Jefferies, 1996, fig. 2A
Deuterostomia(6)	12	3103	996	450	1473	67.90203	11.5	4	0.444444	12.5	0.466276	Precamb-Jur	Jefferies, 1996, fig. 2B
Deuterostomia(6)	12	3103	996	450	1473	67.90203	14.5	4	0.444444	11.5	0.466276	Precamb-Jur	Jefferies, 1996, fig. 2C
Deuterostomia(6)	12	3103	1063	450	1473	65.74283	8	4	0.4	36	0.400782	Precamb-Jur	Jefferies, 1996, fig. 2D
Deuterostomia(6)	12	3103	1063	450	1473	65.74283	6	4	0.4	39.5	0.400782	Precamb-Jur	Jefferies, 1996, fig. 2E
Deuterostomia(6)	12	3103	1063	450	1473	65.74283	7	4	0.4	33.5	0.400782	Precamb-Jur	Jefferies, 1996, fig. 2F
Deuterostomia(6)	12	3103	1030	450	1473	66.806316	7.5	5	0.5	20.5	0.43304	Precamb-Jur	Jefferies, 1996, fig. 2G
Deuterostomia(6)	12	3103	1030	450	1473	66.806316	7.5	5	0.5	15.5	0.43304	Precamb-Jur	Jefferies, 1996, fig. 2H
Deuterostomia(6)	12	3103	1030	450	1473	66.806316	4	6	0.6	3	0.43304	Precamb-Jur	Jefferies, 1996, fig. 2I
Deuterostomia(6)	12	3103	1030	450	1473	66.806316	3.5	5	0.5	8	0.43304	Precamb-Jur	Jefferies, 1996, fig. 2J
Deuterostomia(6)	12	3103	1030	450	1473	66.806316	8	6	0.6	6	0.43304	Precamb-Jur	Jefferies, 1996, fig. 2K
Deuterostomia(6)	12	3103	1123	450	1473	63.809217	18	6	0.6	12.5	0.342131	Precamb-Jur	Jefferies, 1996, fig. 2L
Deuterostomia(6)	12	3103	1090	450	1473	64.872704	14.5	5	0.5	18	0.374389	Precamb-Jur	Jefferies, 1996, fig. 2M
Deuterostomia(6)	12	3103	1473	450	1473	52.52981	100	1	0.1	55	0	Precamb-Jur	Jefferies, 1996, fig. 2N
Deuterostomia(6)	12	3103	1063	450	1473	65.74283	8	4	0.4	36	0.400782	Precamb-Jur	Jefferies, 1996, fig. 2O
Deuterostomia(6)	12	3103	1386	450	1473	55.333548	85.5	3	0.3	96	0.085044	Precamb-Jur	Jefferies, 1996, fig. 3
Deuterostomia(7)	7	3067	937	450	937	69.448973	100	1	0.2	97	0	Precamb-Jur	Jefferies, 1996, fig. 4
Cornuta(1)	21	277	185	93	1010	33.212996	8	17	0.894737	0.5	0.899673	Camb-Ord	Cripps, 1988, fig. 16
Cornuta(2)	17	343	185	93	763	46.06414	8	13	0.866667	0.5	0.862687	Camb-Ord	Cripps, 1988, fig. 17
Cornuta(3)	25	619	354	93	1121	42.810985	8	13	0.565217	10	0.746109	Camb-Ord	Daley, 1992, fig. 15
Cornuta-Scotiaecystidae	6	83	0	93	198	100	100	4	1	100	1.885714	Camb-Ord	Cripps, 1988, fig. 18
Mitrata(1)	6	124	86	33	86	30.645161	100	1	0.25	95.5	0	Ord	Craske & Jefferies, 1989, fig. 20
Mitrata(2)	9	129	156	69	339	-20.930233	3.5	3	0.428571	17	0.677778	Ord-Sil	Ruta & Theron, 1997, fig. 23
Mitrata(3)	11	139	536	102	630	-285.61151	61	5	0.555556	0.5	0.17803	Ord-Sil	Ruta & Theron, 1997, fig. 25
Mitrata-Allanicytidiidae	5	64	45	39	87	29.6875	11.5	1	0.333333	59	0.875	Ord	Ruta & Theron, 1997, fig. 24
Mitrata-Mitrocystitidae	13	156	196	63	272	-25.641026	13	6	0.545455	29	0.363636	Ord-Sil	Ruta, 1997, fig. 9

References for tested cladograms

Craske, A. J. and Jefferies, R. P. S. (1989) A new mitrate from the Upper Ordovician of Norway, and a new approach to subdividing a plesion. Palaeontology, 32, 69-99.
Cripps, A. P. (1988) A new species of stem-group chordate from the Upper Ordovician of Northern Ireland. Palaeontology, 31, 1053-1077.
Daley, P. E. J. (1992) Two new cornutes from the Lower Ordovician of Shropshire and southern France. Palaeontology, 35, 127-148.
Jefferies, R. P. S. (1986) The ancestry of the vertebrates. British Museum (Natural History), London.
Jefferies, R. P. S. (1990) The solute Dendrocystoides scoticus from the Upper Ordovician of Scotland and the ancestry of chordates and echinoderms. Palaeontology, 33, 631-679.
Peterson, K. J. (1995) A phylogenetic test of the calcichordate scenario. Lethaia, 28, 25-38.
Ruta, M. (1997) A new mitrate from the Lower Ordovician of southern France. Palaeontology, 40, 363-383.
Ruta, M. and Theron, J. N. (1997) Two Devonian mitrates from South Africa. Palaeontology, 40, 201-243.
Woods, I. S. and Jefferies, R. P. S. (1992) A new stem-group chordate from the Lower Ordovician of South Wales, and the problem of locomotion in boot-shaped cornutes. Palaeontology, 35, 1-25.