Zoekpdracht: auteur: "Steur, H."
|Titel||Rhacophyton, een interessante plant uit het Laat-devoon|
|Tijdschrift||Grondboor & Hamer|
|Pagina's||73 - 77|
|Trefwoorden||beschrijving, systematiek, vondsten|
|Samenvatting||It is rather difficult to make a study of Devonian plants. Their fossils are uncommon and rarely well-preserved. If one wants to determine them, one has to examine not only their stems and leaves but also the sporangia and some anatomical features.So thin sections of mineralized stems are sometimes required. This is also the case with the described genus Rhacopython, that lived during the Upper-Devonian (Famennian). The author collected some nice specimens in the neighbourhood of Liège. Most common there is Rhacophyton condrusorum. Like other Devonian plants Rhacophyton had no clear distinguishible stems, branches and leaves. The most important characteristics are clusters of sporangia and the elongated or starlike cross-sections of the woodvessels. Some features connect them with Gymnosperms, others with ferns. Despite this, Rhacophyton is considered to have belonged to a different line of evolution.|