zosterophyllum造句

• Although similar in some characteristics to the genus " Zosterophyllum"
• Edwards notes that since then, reviews of the genus " Zosterophyllum " have clarified its circumscription.
• Specimens were first attributed to " Zosterophyllum " cf . " myretonianum " by Corsin in 1933.
• All species of " Zosterophyllum " have a compact spike of sporangia, arranged helically with some degree of regularity.
• The sporangia opened via slits, but these did not have the thickened borders which are a feature of some " Zosterophyllum " species.
• ""'Zosterophyllum " "'was a genus of Silurian-Devonian vascular land plant with branching axes on which kidney-shaped sporangia were arranged in lateral positions.
• A cladogram published in 2004 by Crane et al . places the species of " Zosterophyllum " in a paraphyletic stem group of broadly defined " zosterophylls ", basal to the lycopsids ( living and extinct clubmosses and relatives ).
• Although the general shape of the sporangia resembles that of zosterophylls, " Hollandophyton " sporangia lack the thickened edges of the sporangial'valves'which are characteristic of species assigned to this group, such as " Zosterophyllum llanoveranum " or " Ventarura lyonii ".
• David P . Penhallow's generic description of the type genus " Zosterophyllum " refers to " Aquatic plants with creeping stems, from which arise narrow dichotomous branches and narrow linear leaves of the aspect of " Zostera " . " " Zosterophyllum rhenanum " was reconstructed as aquatic, the lack of stomata on the lower axes giving support to this interpretation.
• David P . Penhallow's generic description of the type genus " Zosterophyllum " refers to " Aquatic plants with creeping stems, from which arise narrow dichotomous branches and narrow linear leaves of the aspect of " Zostera " . " " Zosterophyllum rhenanum " was reconstructed as aquatic, the lack of stomata on the lower axes giving support to this interpretation.