Classification of the phylum Pteridospermophyta

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G. †Albertlongia Taylor 1967
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†Albertlongia incostata Taylor 1967
G. †Angaropteris Chachlov and Pollak 1936
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†Angaropteris glossopteroides Schmalhausen 1936
G. †Aulacotheca Halle 1933
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†Aulacotheca elongata Kidston 1933
G. †Bardia Zalessky 1933
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†Bardia maueri Zalessky 1933
G. †Bilignea Kidston 1923
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†Bilignea solida Kidston 1923
G. †Boulaya Carpentier 1925
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†Boulaya fertilis Kidston 1933
G. †Brongniartites Zalessky 1927
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G. †Buteoxylon Barnard and Long 1973
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†Buteoxylon gordonianum Barnard and Long 1973
G. †Calathiops Goeppert 1865
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†Calathiops beinertiana Goeppert 1865
G. †Calathospermum Walton 1940
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†Calathospermum scoticum Walton 1940
Invalid names: Megatheca Andrews 1940 [synonym]
G. †Calymmatotheca Stur 1877
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G. †Camptosperma Long 1961
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G. †Canipa Skog 1969
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†Canipa quadrifida Skog 1969
G. †Cephalopteris Nathorst 1914
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†Cephalopteris mirabilis Nathorst 1914
G. †Chapelia Beck and Bailey 1967
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†Chapelia campbellii Beck and Bailey 1967
G. †Codonotheca Sellards 1903
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†Codonotheca caduca Sellards 1903
G. †Coseleya Kidston 1914
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†Coseleya glomerata Kidston 1914
G. †Crossotheca Zeiller 1883
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†Crossotheca crepini Zeiller 1883
G. †Dictyoxylon Williamson 1869
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†Dictyoxylon oldhamium Binney 1869
G. †Dimeripteris Schmalhausen 1894
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†Dimeripteris fasciculata Schmalhausen 1894
G. †Diplotheca Kidston 1903
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†Diplotheca stellata Kidston 1903
G. †Diplothmema Stur 1877
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†Diplothmema gothanica Iannuzzi and Pfefferkorn 2002
†Diplothmema patentissimum Ettingshausen 1875
G. †Dolichosperma Long 1961
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G. †Eccroutosperma Long 1961
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G. †Eltovaria White 1929
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†Eltovaria bursiformis White 1929
G. †Emplectopteris Halle 1927
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G. †Eurystoma Long 1960
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†Eurystoma angulare Long 1960
G. †Geminitheca Smith 1959
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†Geminitheca scotia Smith 1959
G. †Genomosperma Long 1960
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†Genomosperma kidstoni Calder 1938
G. †Gimmia Remy 1953
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†Gimmia unilatera Remy 1953
G. †Girtya Read 1955
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†Girtya pennsylvanica Read 1955
Fm. †Glossophyllaceae Dobruskina 1982
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G. †Caytonanthus Harris 1937
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†Caytonanthus arberi Thomas 1925
G. †Leuthardtia Kraüsel and Schaarschmidt 1966
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†Leuthardtia ovalis Kraeusel and Schaarschmidt 1966
G. †Gnetopsis Renault and Zeiller 1884
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†Gnetopsis elliptica Renault and Zeiller 1884
G. †Goldenbergia Halle 1933
G. †Halletheca Taylor 1971
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†Halletheca reticulatus Taylor 1971
G. †Heterangium Corda 1845
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†Heterangium paradoxum Corda 1845
G. †Heterotheca Benson 1922
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†Heterotheca grievii Benson 1922
G. †Hoegia Townrow 1957
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†Hoegia papillata Townrow 1957
G. †Hydrasperma Long 1961
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†Hydrasperma tenuis Long 1961
G. †Hymenotheca Potonie 1890
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†Hymenotheca beyschlagi Potonie 1890
G. †Ilfeldia Remy 1953
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†Ilfeldia jejunata Grand'Eury 1877
G. †Jongmansis Plumstead 1958
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†Jongmansis transvaalensis Plumstead 1958
G. †Kegelidium Dolianiti 1954
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†Kegelidium lamegoi Dolianiti 1954
G. †Kurtziana Frenguelli 1942
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†Kurtziana cacheutensis Kurtz 1921
G. †Lacoea Read 1946
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†Lacoea seriata Read 1946
G. †Lagenospermum Nathorst 1914
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G. †Lagenostoma Williamson 1876
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†Lagenostoma ovoides Williamson 1876
G. †Lithangium Pant and Nautiyal 1960
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†Lithangium indicum Pant and Nautiyal 1960
†Lithangium ovoides Pant and Nautiyal 1960
†Lithangium surangei Pant and Nautiyal 1960
G. †Lyginorachis Kidston 1923
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†Lyginorachis papilio Kidston 1923
G. †Megaloxylon Seward 1899
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†Megaloxylon scotti Seward 1899
G. †Microspermopteris Baxter 1949
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G. †Nudospermum Stockmans and Williere 1961
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†Nudospermum kidstoni Arber 1905
G. †Nystroemia Halle 1927
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G. †Ootheca Nathorst 1914
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†Ootheca nordenskioldii Nathorst 1914
G. †Paracalathiops Remy 1953
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G. †Paragonorrachis Grand'Eury 1877
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G. †Perezlaria Delevoryas and Gould 1971
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†Perezlaria oaxacensis Delevoryas and Gould 1971
G. †Periastron Unger 1856
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†Periastron reticulatum Unger 1856
G. †Physostoma Williamson 1876
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†Physostoma elegans Williamson 1876
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Invalid names: Lagenostoma physoides Williamson 1876 [synonym], Sporocarpon ornatus Williamson 1880 [synonym]
G. †Potoniea Zeiller 1899
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†Potoniea adiantiformis Zeiller 1899
G. †Pteridozamites Corsin 1929
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†Pteridozamites zamioides Bertrand 1929
G. †Rhetinangium Gordon 1912
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†Rhetinangium arberi Gordon 1912
G. †Rhetinotheca Leisman and Peters 1970
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†Rhetinotheca tetrasolenata Leisman and Peters 1970
G. †Rotodontiospermum Arnold and Steidtmann 1937
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†Rotodontiospermum illinoense Arnold and Steidtmann 1937
G. †Runcaria Stockmans 1968
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†Runcaria heinzelinii Stockmans 1968
G. †Salpingostoma Gordon 1941
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†Salpingostoma dasu Gordon 1941
G. †Schopfiastrum Andrews 1945
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†Schopfiastrum decussatum Andrews 1945
G. †Schopfitheca Delevoryas 1964
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†Schopfitheca boulayoides Delevoryas 1964
G. †Simplotheca Remy and Remy 1955
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†Simplotheca silesiaca Remy and Remy 1955
G. †Spermolithus Johnson 1917
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†Spermolithus devonicus Johnson 1917
G. †Spermopteris Cridland and Morris 1960
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†Spermopteris coriacea Goeppert 1864
G. †Sphaerostoma Benson 1909
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†Sphaerostoma ovale Williamson 1909
G. †Sphenoxylon Read 1937
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†Sphenoxylon eupunctata Thomas 1935
G. †Stamnostoma Long 1960
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G. †Staphylotheca Smith 1962
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G. †Stenokoleos Hoskins and Cross 1951
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†Stenokoleos setchelli Read and Campbell 1939
G. †Syncrama Holden 1955
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†Syncrama liratum Holden 1955
G. †Tantallosperma Barnard and Long 1973
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†Tantallosperma setigera Barnard and Long 1973
G. †Telangium Benson 1904
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†Telangium scotti Benson 1904
G. †Tetrastichia Gordon 1938
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†Tetrastichia bupartides Gordon 1938
G. †Tristichia Long 1961
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†Tristichia ovensi Long 1961
G. †Tyliosperma Mamay 1954
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G. †Unguitheca Remy 1953
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G. †Utkalia Chandra 1984
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†Utkalia dichotoma Chandra 1984
G. †Whittleseya Newberry 1853
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†Whittleseya elegans Newberry 1853
G. †Yakia White 1929
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†Yakia heterophylla White 1929
G. †Zimmermannitheca Remy and Remy 1959
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†Zimmermannitheca cupulaeformis Remy and Remy 1959