Table 1 in Two new species of megasporangiate Sigillariostrobus Schimper (Sigillariostrobaceae) fructifications from the British Coal Measures

<p><b>Table 1.</b> Morphological comparison of <i>Sigillariostrobus</i> cones with in situ spores referable to <i>Laevigatisporites glabratus</i>.</p><table><tbody><tr><th></th><th><i>S. tieghemi</i></th><th><i>S. quadrangularis</i> (Les-</th><th><i>S. czarnockii</i> Bochen-</th><th><i>S. leiosporous</i> Abbott,</th><th><i>Sigillariostrobus</i></th></tr></tbody><tbody><tr><th></th><td>Zeiller, 1884</td><td>quereux) White, 1903</td><td>ski, 1936</td><td>1963</td><td><i>saltwellensis</i> sp.</td></tr><tr><th></th><td></td><td></td><td></td><td></td><td>nov.</td></tr><tr><th>Cone size</th><td>160 mm long</td><td>Up to 160 mm long, av-</td><td>ca. 180 mm long, 17&ndash;</td><td>Up to 180 mm long,</td><td>At least 86 mm</td></tr><tr><th></th><td>25&ndash;50 mm</td><td>erage width 11.6 mm</td><td>25 mm broad</td><td>20 mm broad</td><td>long, 17&ndash;20 mm</td></tr><tr><th></th><td>broad</td><td></td><td></td><td></td><td>broad</td></tr><tr><th>Cone axis</th><td></td><td>1 mm</td><td>7&ndash;8 mm</td><td>4&ndash;7 mm</td><td>1.2 mm</td></tr><tr><th>Sporophyll</th><td>Alternating</td><td>In whorls</td><td>Helical with sporo-</td><td>Alternating verticils</td><td>Helical</td></tr><tr><th>arrangement</th><td>whorls with</td><td></td><td>phylls lying above one</td><td>of 4&ndash;5 sporophylls;</td><td></td></tr><tr><th></th><td>8&ndash;10 per whorl</td><td></td><td>another</td><td>3&ndash;4 mm between</td><td></td></tr><tr><th></th><td></td><td></td><td></td><td>verticils</td><td></td></tr><tr><th>Sporophyll</th><td>With prominent</td><td>Sporophyll laminae</td><td>Sporophylls 20&ndash;25 mm</td><td>Pedicels: 5&ndash;7 mm long,</td><td>Laminae ca.</td></tr><tr><th>shape</th><td>heel</td><td>9 mm long</td><td>long; upper part</td><td>1 mm broad at attach-</td><td>6.5 mm long,</td></tr><tr><th></th><td></td><td></td><td>sharply pointed with a</td><td>ment point, widening to</td><td>spreading out-</td></tr><tr><th></th><td></td><td></td><td>hollowed-out deltoid</td><td>4 mm</td><td>wards from</td></tr><tr><th></th><td></td><td></td><td>shape, margin ciliate.</td><td>Laminae: broadly</td><td>cone</td></tr><tr><th></th><td></td><td></td><td></td><td>triangular, acuminate,</td><td></td></tr><tr><th></th><td></td><td></td><td></td><td>5&ndash;8 mm long, 4&ndash;6 mm</td><td></td></tr><tr><th></th><td></td><td></td><td></td><td>broad, margin ciliate</td><td></td></tr><tr><th>Sporangia</th><td>None observed</td><td>4 mm long, 5 mm high,</td><td>4&ndash;7 mm long, breadth</td><td>4&ndash;5 mm long, 2 mm</td><td>7 mm long,</td></tr><tr><th></th><td></td><td>4 mm broad</td><td>2&ndash;4.5 mm;</td><td>high, 4&ndash;4.5 mm wide;</td><td>2.5 mm high</td></tr><tr><th></th><td></td><td></td><td>contain three tetrads of</td><td>contains one tetrad of</td><td></td></tr><tr><th></th><td></td><td></td><td>megaspores</td><td>megaspores</td><td></td></tr><tr><th>Peduncle</th><td>Acicular leaves</td><td>None observed</td><td>At least 40 mm long</td><td>At least 65 mm long</td><td>None observed</td></tr><tr><th></th><td>or bracts</td><td></td><td>and 7&ndash;8 mm broad,</td><td>and 2&ndash;5 mm broad,</td><td></td></tr><tr><th></th><td>attached to the</td><td></td><td>uppermost 30 mm with</td><td>covered with minute</td><td></td></tr><tr><th></th><td>upper portion</td><td></td><td>long, triangular and</td><td>stiff spines up to 1 mm</td><td></td></tr><tr><th></th><td></td><td></td><td>pointed sterile leaves</td><td>long</td><td></td></tr><tr><th></th><td></td><td></td><td>25 mm long and 25 mm</td><td></td><td></td></tr><tr><th></th><td></td><td></td><td>wide at the base</td><td></td><td></td></tr><tr><th>Age and</th><td>Age unknown,</td><td>Brazil Formation,</td><td>Duckmantian, Upper</td><td>Upper Freeport (no.</td><td>Upper Langsettian&ndash;</td></tr><tr><th>locality</th><td>Valenciennes,</td><td>Upper Pottsville,</td><td>Silesian Basin, Poland</td><td>7) Coal Allegheny,</td><td>Duckmantian</td></tr><tr><th></th><td>France</td><td>Duckmantian/</td><td></td><td>mid-Pennsylvanian,</td><td></td></tr><tr><th></th><td></td><td>Bolsovian</td><td></td><td>Bolsovian/Asturian,</td><td></td></tr><tr><th></th><td></td><td>Indiana, USA</td><td></td><td>southeastern Ohio,</td><td></td></tr><tr><th></th><td></td><td></td><td></td><td>USA</td><td></td></tr></tbody></table>