Dispersed cuticles and conducting tissue of Sphenophyllum BRONGNIART from the Westphalian D of Kalinovo , Donets Basin , Ukraine
نویسنده
چکیده
Upper Westphalian coals are usually rich in organic-matter of different plant taxa, including gymnosperms. The assemblage from Kalinovo (Eastern Ukraine) is exceptional in being dominated by Sphenophyllum, both cuticles and conducting tissues. Sphenophyllum cuticles are easily distinguished by their parallel oriented cells with sinuous anticlinal walls, and paracytic stomata on the abaxial cuticle. Tracheids with multiseriate bordered pits that occur in Sphenophyllum can be also found in the Calamitaceae and some pteridosperms. However, rectangular shaped remains of parenchyma cell strips along the radial wall of tracheids are only known in Sphenophyllum.
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