The flight feathers have a stiff central axis (the rachis), and up close one can even discern tiny hooklets, or barbules, which interlock with eachother to create a strong feather surface that can withstand high forces.
Most have pinnately compound leaves (leaves which are divided into leaflets arranged feather-like, in pairs along a central axis); one species has entire leaves.
The X-axis is the average CPM (count per million) value of feather-associated genes (Y-axis) from high to low in feather samples (left panel).
The genus Attalea has pinnately compound leaves rows of leaflets emerge on either side of the axis of the leaf in a feather-like or fern-like pattern.
The leaves of Aiphanes species are usually pinnately divided rows of leaflets emerge on either side of the axis of the leaf in a feather-like or fern-like pattern.
This area contains an oval topographic feature that is 60 km along its long axis and 30 km along its short axis, and a feather-shaped feature that marks a zone of concentrated crevasses.
Observation on our new materials attributed to X. sinica has identified a holdfast and feather-like tentacles that have many long branches extending alternately from the tentacle axis.
The third PCO axis captures a similar tradeoff between distal (iip2, dpf) and proximal (fp) 1° feather attachments.
The louse body is flattened dorsoventrally with the long axis of the head horizontal, enabling it to lie close along the feathers or hairs for attachment or feeding.
Probably, they said, it's because "the mass of the feathers was distributed more or less symmetrically in the box (ie the feathers filled the box), but the mass of the lead was distributed asymmetrically along the vertical axis (the box was "bottom-heavy").
