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Danziella
''Danziella'' is a genus of extinct vascular plants of the Early Devonian (around ). Fossils found in the Artois region of northern France were first described as ''Zosterophyllum artesianum'',〔 but a later review by Edwards showed that they did not fit the circumscription of that genus.〔
==Description==
Compressed fossils were found in the Artois region of northern France, in rocks which were originally thought to be of Pragian age (around ) but more recently have been considered to be probably of Emsian origin (around ). Plants consisted of smooth leafless stems (axes) up to 1.5 mm wide and were at least 85 mm high. They branched at right angles. Spore-forming organs or sporangia were borne on all sides, spaced irregularly on stalks up to 3 mm long which held them horizontally, and not forming a distinct 'spike'. Individual sporangia were elliptical in shape, around 3 mm wide by 2 mm high, splitting into two 'valves' along a line opposite to the stalks in order to release their spores. Since the sporangia were at right angles to the stem, the split was vertical.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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