(click on thumbnails to enlarge pictures)

Brazil, Pedra de Fogo Formation, Tocantins, Psaronius brasiliensis, Permian, 12,5 cm Brazil, Pedra de Fogo Formation, Tocantins, Tietea singularis, Permian, 13 cm
Brazil, Pedra de Fogo Formation, Tocantins,
Tietea sp., Permian, 16 cm
Brazil, Pedra de Fogo Formation, Tocantins, Agathoxylon sp. and a few cordaite roots Amyelon sp. in the Psaroniaceae adventitious roots, at the magnification Amyelon sp. and Psaroniaceae adventitious root, Permian, 24,5 cm
Brazil, Pedra de Fogo Formation, Tocantins, Psaronius sinuosus, Permian, 12 cm Brazil, Pedra de Fogo Formation, Tocantins, Tietea singularis with coprolites and gymnospermous roots,
at the magnification coprolites, Permian, 34,5 cm
Brazil, Pedra de Fogo Formation, Tocantins, Tietea sp. penetrated by Sphenophyllum sp., at the magnification anatomy of Sphenophyllum sp. visible, Permian, 23 cm Brazil, Pedra de Fogo Formation, Tocantins, Agathoxylon sp. with Grammatopteris freitasii, Permian, 10 cm
Brazil, Pedra de Fogo Formation, Tocantins, adventitious roots of Psaroniaceae penetrated by Botryopteris nollii, at the magnification stalk, petioles and adventitious roots of B. nollii visible, Permian, 36 cm Brazil, Pedra de Fogo Formation, Tocantins, Agathoxylon sp. with two piths, Permian, 9 cm
Brazil, Paraná Basin,
Tuvichapteris sp., Permian,
diameter 14 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 19 cm
Brazil, Tocantins,
Agathoxylon sp., Permian,
diameter 12,5 cm
Brazil, Tocantins,
Psaronius sp., Permian,
diameter 9 cm
Brazil, Tocantins,
Psaronius sinuosus, Permian,
diameter 10 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 10,5 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 11,5 cm
Brazil, Tocantins,
Tietea sp., Permian,
diameter 12,5 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 11,5 cm
Brazil, Tocantins,
Psaronius brasiliensis, Permian,
diameter 18 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 12 cm
Brazil, Tocantins,
Tietea sp., Permian,
diameter 22 cm
Brazil, Pedra de Fogo Formation, Tocantins, Dernbachia brasiliensis, Permian, 10 cm Brazil, Pedra de Fogo Formation, Psaronius sp., Permian, 10 - 11,5 cm Brazil, Maranhao Basin, Grammatopteris freitasii, Permian, 14 - 17,5 cm
Brazil, Pedra de Fogo Formation, Grammatopteris freitasii, Permian, complete section, diameter 11,5 cm Brazil, Pedra de Fogo Formation, Psaronius sinuosus, Permian, complete section, diameter 13,5 cm Brazil, Pedra de Fogo Formation, Psaronius brasiliensis, Permian, complete section, diameter 7,5 cm
Brazil, Maranhao Basin, Grammatopteris freitasii, Permian,
diameter 14 - 22 cm
Brazil, Pedra de Fogo Formation, Tietea singularis, Permian,
diameter 13 - 15,5 cm
Brazil, Pedra de Fogo Formation, Psaronius sp., Permian,
diameter 6,5 - 7,5 cm
Brazil, Pedra de Fogo Formation, Arthropitys sp., Permian,
diameter 8,5 - 10 cm
Brazil, Bielandia, Tocantins province, Arthropitys sp.,
290 mya (Permian),
diameter 8 cm
Brazil, Bielandia, Tocantins province, Arthropitys sp.,
290 mya (Permian),
diameter 8,5 - 12,5 cm
Brazil, Pedra de Fogo Formation, Arthropitys sp., Permian (296 - 248 mya), quartz mineralisation,
complete section,
diameter 10 cm
Brazil, Agathoxylon sp.,
quartz mineralisation, white agate plumey formations and crystals in the centre, complete section, diameter 13 - 15 cm
Brazil, Pedra de Fogo Formation, Agathoxylon sp., Permian (296 - 248 mya), quartz mineralisation, complete section, diameter
10 - 13 cm
Brazil, Psaronius sinuosus, Permian (296 - 248 mya),
mainly agate mineralisation (mixed mineralisation),
spaces filled by little quartz crystalls,
complete section, diameter 9 - 11 cm
Brazil, Bielandia, Tocantins province, Arthropitys sp., Permian (296 - 248 mya), quartz mineralisation,
complete section,
diameter 8 - 10 cm
Brazil, Tietea singularis, Permian, diameter 11 cm Brazil, Tietea singularis, quartz mineralisation, piece of trunk, diameter 10 - 13 cm, height 10 cm Brazil, Tietea singularis,
Cretaceous (142 - 65 mya),
quartz mineralisation,
complete section,
diameter 8 - 9,5 cm
Brazil, Tietea singularis, quartz mineralisation, piece of trunk, diameter 7 - 11,5 cm, height 18,5 cm Brazil, Tietea singularis, quartz mineralisation,
piece of trunk,
diameter 11 - 12 cm,
height 8 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 11,5 cm
Brazil, Tocantins,
Tietea sp., Permian,
diameter 13 cm
Brazil, Tocantins,
Tietea singularis, Permian,
diameter 12,5 cm
Brazil, Tocantins,
Psaronius sp., Permian,
diameter 10 cm
Brazil, Tocantins,
Psaronius sp., Permian,
diameter 10,5 cm
Brazil, Tocantins,
Tietea sp., Permian,
diameter 10 cm

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