带有羊齿羽片披针形复叶的蕨类。
它可能蔓延沿着整个底的羽片在数天内。
It could spread along the entire underside of the pinna within days.
用光学显微镜和扫描电镜对合意非洲铁羽片表皮及气孔器的发育过程进行观察研究。
The ontogeny of pinna epidermis and stomatal apparatus in Encephalartos gratus Prain have been observed with LM and SEM.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon-size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
一旦演化到阶段4之后，其他各种不同的羽毛才能够演化出来，包括我们在阶段5看到的各种特化羽毛，例如飞羽的不对称羽片。
Only after stage 4 could additional feather variations evolve, including the many specializations we see at stage 5, such as the asymmetrical vane of a flight feather.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon -size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon -size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
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