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photo-album by Carles Martín-Closas Charophyte thalli from the Uppermost Barremian of Las Hoyas (Cuenca, Spain) Macrofossils |
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Clavatoraxis robustus MARTIN-CLOSAS et DIEGUEZ 1998 Apex of large thallus showing main axis covered with granules (spine-cell rosettes) and three closely packed whorls of branchlets. |
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Clavatoraxis diaz-romerali MARTIN-CLOSAS et DIEGUEZ 1998 Fragment of delicate thallus showing disperse spine-cell rosettes scattered upon the surface. Species named after Mr. Armando Diaz-Romeral from Cuenca, who kindly lent these fossils for study. |
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Charaxis spicatus MARTIN-CLOSAS et DIEGUEZ 1998 Apex of thallus showing five nodes bearing long unicellular branchlets. |
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Paleonitella vermicularis MARTIN-CLOSAS et DIEGUEZ 1998 Fragment of filamentous ecorticate thallus with nodes bearing small unicellular branchlets. |
| Thin sections |
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Clavatoraxis robustus MARTIN-CLOSAS et DIEGUEZ 1998 Deep tangential section trough internode showing cortical cells covered by spine-cell rosettes. These are interpreted to be an adaptation against herbivores. Width of internode 2,3 mm. |
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Clavatoraxis diaz-romerali MARTIN-CLOSAS et DIEGUEZ 1998 Longitudianl section trough phylloid showing whorls of spine-cell rosettes. Width of section 0,8 mm. |
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Charaxis spicatus MARTIN-CLOSAS et DIEGUEZ 1998 Slightly oblique section through internodes showing cortication. Main diameter of section 1,8 mm. |
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Charaxis spicatus MARTIN-CLOSAS et DIEGUEZ 1998 Longitudinal section through apex of thallus. Total length of section 7 mm. |
| Fragments of Charophyte thalli from the Lower Cretaceous of the Maestrat basin (Castelló, Spain) |
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Clavatoraxis sp. Fragment of thallus showing spirally arranged spine-cell rosettes and cortication. Diameter of thallus ca 0,4 mm. Berriasian of Els Mangraners section. |
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Clavatoraxis sp. Fragment of phylloid showing spine cell rosettes arranged in whorls. Total length of fragment ca 1 mm. Berriasian of Els Mangraners section. |
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"Munieria"-type thalli Lateral view of internodes showing interdigitation of cortical cells in the central area. Total length of largest fragment 1,4 mm. Lower Barremian of Barranc de l'Escresola. |
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"Munieria"-type thalli Transversal sections trough internode (above) and node (below) showing external crenulation corresponding to cortical cells. Nodal cells are visible below. Diameter 0,4 mm. Lower Barremian of Barranc de l'Escresola. |
References
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