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Transverse section of two sporangia of Aglaophyton major with spore remains. Diameter sporangium 3 mm. Groningen.
On the right: Detail showing the strong sporangial wall.
Transverse section of a sporangium with decayed spored fallen down. Diameter sporangium 3 mm. Groningen.
Transverse section of a sporangium. Largest diameter 4 mm. Groningen.
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