Classification of the family Synastraeidae
Fm. †Synastraeidae Alloiteau 1952
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G. †Crateroseris Tomes 1883
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†Crateroseris fungiformis Tomes 1883
†Crateroseris parvistella Negus and Beauvais 1979
G. †Dimorphoseris Duncan 1872
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†Dimorphoseris affinis Becker 1875
†Dimorphoseris helianthus Becker 1875
†Dimorphoseris rossi Gregory 1921
†Dimorphoseris tabayamensis Nishimiya and Yamagiwa 1973
G. †Edwardsoseris Alloiteau 1946
G. †Synastrea Milne-Edwards and Haime 1848
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†Synastrea agaricites Goldfuss 1826
†Synastrea bellula d'Orbigny 1850
†Synastrea delemontana Koby 1887
†Synastrea dubia de Fromentel 1861
†Synastrea foliacea Quenstedt 1852
†Synastrea garumnica Vidal 1921
†Synastrea geometrica Goldfuss 1826
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Invalid names: Synastrea subflabellata Alloiteau 1951 [synonym]
†Synastrea microsolenoides Roniewicz 2008
†Synastrea parallela Reuss 1846
†Synastrea procera Reuss 1854
†Synastrea subagaricites Becker 1875
†Synastrea subconica Beauvais and M'Rabet 1977