492


Journal of Paleontology 91(3):477–492


Weller, S., and Davidson, A.D., 1896, Petalocrinus mirabilis (n. sp.) and a new American fauna: The Journal of Geology, v. 4, p. 166–173.


Witzke, B.J., and Strimple, H.L., 1981, Early Silurian crinoids of eastern Iowa: Proceedings of the Iowa Academy of Science, v. 88, p. 101–137.


Witzke, B.J., Frest, T.J., and Strimple, H.L., 1979, Biogeography of the Silurian-Lower Devonian echinoderms, In: Gray, J., and Boucot, A.J., eds., Historical Biogeography, Plate Tectonics and the Changing Environment: Oregon State University Press, Corvallis, p. 117–129.


Yang, X.P., Zhang, B.M., and Liu, S.B., 2002, Origin and Reservoir Property of Silurian Carbona mud mound in Southern Sichuan Basin: Marine Origin Petroleum Geology, v. 7, p. 26–32. (in Chinese with English abstract)


Accepted 7 November 2016 Appendices


Appendix 1.—Characters for genera of the Petalocrinidae. A. Adjacent arms in lateral contact: 0, yes; 1, not. B. Shape of second primibrachial in oral view: 0, triangular; 1, narrow triangle; 2, straight sides.


C. Cross-section shape: 0, flat; 1, circular. D. Position of ambulacra: 0, oral only; 1, both aboral and oral surface.


E. Percentage of ambulacral coverage in aboral surface: 0, 0%; 1, 0–33%; 2, 33–50%; 3, 50–90%; 4, 100%.


F. Maximum number of ambulacra: 0, 12–32; 1, >32; 2, 6–12.


Appendix 2.—Character states for phylogenetic analysis of the Petalocrinidae.


Characters Genera


Eopetalocrinus sinensis Petalocrinus inferior


A B C D E F G H I J K 00 00 0


Petalocrinus stenopetalus n. sp. 1 1 0 0 0 2 1 0 - 1 1 Sinopetalocrinus involutus 10 01 2 Sinopetalocrinus shiqianensis 10 01 1 10 01 3


10 00 0


Sinopetalocrinus robustus Spirocrinus circularis n. sp. Spirocrinus longus


Spirocrinus dextrosus n. sp.


0 0


1 1 1


2


0 0 - 0 0 -


0 0 - 0 0 - 0 0 -


1 1 0


0 0


0 0 0


0


0 0


0 0 0


1 2 1 1 4 2 1 0 - 1 1 12 11 4


1 1 2 1 1 4 2 1 1 1 0 1


G. Height/width ratio of second primibrachial: 0, <1.8; 1, >1.8. H. Ambulacra: 0, planar; 1, spiral. I. Direction of spiral: 0, left-handed spiral (counterclockwise); 1, right-handed spiral (clockwise).


J. Morphology of ambulacra: 0, curved; 1, straight. K. Ambulacra branching pattern: 0, poor isotomy; 1, endotomy.


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212  |  Page 213  |  Page 214  |  Page 215  |  Page 216