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. 2008 Mar 17;105(12):4786–4791. doi: 10.1073/pnas.0709378105

Table 2.

Relative tagmosis values of crustacean orders (compared with the contemporaneous average) at their time of origin and extinction

Trait Sign test
Wilcoxon test
No. of differences
P value Median difference (H0 = 0) V P value
Positive Negative Zero
Relative value at origination; n = 66 (51)
Brillouin tagmosis value 46 (35) 20 (16) 0 (0) 0.0019* (0.0110*) 0.172 (0.184) 1564 (935) 0.0034* (0.0109*)
Total no. of limbs 33 (29) 30 (19) 3 (3) 0.801 (0.193) 0.667 (1.882) 1231 (800) 0.128 (0.0300)
No. of limb types 47 (37) 18 (13) 1 (1) 0.00042* (0.00094*) 0.660 (0.989) 1655.5 (990.5) 0.00014* (0.00067*)
Mean no. of limb types per limb 32 (21) 33 (29) 1 (1) 1.00 (0.322) −0.00790 (−0.0420) 948 (506) 0.418 (0.206)
Average disparity per limb 28 (19) 38 (32) 0 (0) 0.268 (0.0919∼) −0.146 (−0.163) 843 (452) 0.0942 ∼ (0.0485)
Total disparity score 46 (36) 20 (15) 0 (0) 0.0019* (0.0046*) 1.910 (2.50) 1569 (976) 0.0031* (0.0034*)
elative value at extinction; n = 25
Brillouin tagmosis value 12 13 0 1.00 −0.0283 159 0.937
Total limb number 16 9 0 0.230 1.609 1015 0.565
No. of limb types 13 12 0 1.00 0.125 166 0.936
Mean no. limb types per limb 6 19 0 0.0146 −0.115 67 0.00882*
Average disparity per limb 4 21 0 0.00091* −0.454 40 0.00103*
Total disparity score 10 15 0 0.424 −1.438 129 0.375

For the origination analyses, the first values are for results including all taxa (with living taxa having no fossil record being recorded as originating in the Holocene), and the numbers in parentheses are the results excluding taxa lacking a fossil record. Significant (P < 0.05) results are highlighted in bold.

*Results remaining significant after sequential Bonferroni correction (performed across the six traits within each category of analysis).