Statistical support for the hypothesis of developmental constraint in marsupial skull evolution

Bennett, C Verity; Goswami, Anjali

doi:10.1186/1741-7007-11-52

Table 1 Delta variance test results for extant taxa datasets for extant marsupials versus placentals

From: Statistical support for the hypothesis of developmental constraint in marsupial skull evolution

Dataset	Skull region	Marsupial variance	Placental variance	Delta variance	P-value^a
Maximum landmarks	Whole skull	0.0258	0.0681	0.0423	<<0.001
	Neurocranium	0.0344	0.0422	0.0078	0.329
	Viscerocranium	0.0308	0.0873	0.0565	<<0.001
	Non-oral viscerocranium	0.0170	0.0446	0.0275	<<0.001
	Oral region	0.0174	0.0572	0.0398	<<0.001
Maximum taxa	Whole skull	0.0178	0.0521	0.0344	<<0.001
	Neurocranium	0.0342	0.0504	0.0162	0.150
	Viscerocranium	0.0180	0.0697	0.0516	<<0.001
	Oral region	0.0044	0.0251	0.0207	<<0.001
Folivores	Whole skull	0.0004	0.0015	0.0011	0.027^b
	Neurocranium	0.0204	0.0409	0.0205	0.048^b
	Viscerocranium	0.0122	0.0649	0.0528	<<0.001
	Oral region	0.0019	0.0198	0.0179	<<0.001
Frugivores	Whole skull	0.0094	0.0558	0.0464	0.001
	Neurocranium	0.0235	0.0433	0.0198	0.269
	Viscerocranium	0.0110	0.0851	0.0740	0.006
	Oral region	0.0019	0.0130	0.0112	0.006
Omnivores	Whole skull	0.0130	0.0439	0.0309	<<0.001
	Neurocranium	0.0314	0.0310	-0.0004	0.966
	Viscerocranium	0.0092	0.0580	0.0488	<<0.001
	Oral region	0.0037	0.0347	0.0310	<<0.001
Carnivores/insectivores	Whole skull	0.0186	0.0535	0.0348	0.034^b
	Neurocranium	0.0417	0.0809	0.0392	0.280
	Viscerocranium	0.0165	0.0719	0.0554	0.001
	Oral region	0.0031	0.0225	0.0193	<<0.001
Nocturnal/crepuscular	Whole skull	0.0181	0.0360	0.0179	<<0.001
	Neurocranium	0.0386	0.0296	-0.0090	0.413
	Viscerocranium	0.0186	0.0438	0.0251	<<0.001
	Oral region	0.0044	0.0198	0.0154	<<0.001
Arboreal	Whole skull	0.0107	0.0347	0.0240	<<0.001
	Neurocranium	0.0156	0.0280	0.0123	0.031^b
	Viscerocranium	0.0135	0.0392	0.0257	<<0.001
	Oral region	0.0028	0.0139	0.0111	<<0.001
Terrestrial	Whole skull	0.0175	0.0484	0.0309	<<0.001
	Neurocranium	0.0347	0.0628	0.0281	0.097
	Viscerocranium	0.0182	0.0660	0.0478	<<0.001
	Oral region	0.0060	0.0164	0.0103	0.001
Fossorial	Whole skull	0.0198	0.0314	0.0116	0.103
	Neurocranium	0.0380	0.0296	-0.0089	0.454
	Viscerocranium	0.0180	0.0275	0.0095	0.203
	Oral region	0.0040	0.0143	0.0103	0.033^b

^aP-values are before Bonferroni correction.
^bNo longer significant after Bonferroni correction.

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ISSN: 1741-7007

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