- The
pennaceous feather is a type of
feather present in most
modern birds and in some
other species of
maniraptoriform dinosaurs. A
pennaceous feather...
-
stage IV,
differentiated distal and
proximal barbules produce a closed,
pennaceous vane (a
contour feather). A
closed vane
develops when
pennulae on the...
-
underneath the
vaned feathers. The
pennaceous feathers are
vaned feathers. Also
called contour feathers,
pennaceous feathers arise from
tracts and cover...
-
hooked distal pennulae),
pennaceous feathers arising from the
distal forelimbs and tail".
Ancestral morphology relating to
pennaceous feathers suggests that...
- †Ornithomimidae (very ostrich-like dinosaurs)
Maniraptora (dinosaurs with
pennaceous feathers) †Alvarezsauroidea (small
hunters with
reduced forelimbs) †Alvarezsauridae...
-
enlarged and
forelimbs became longer. The
integument evolved into complex,
pennaceous feathers. The
oldest known paravian (and
probably the
earliest avialan)...
- , barbules,
rachides and vanes);
types of
feathers (e.g., filoplume,
pennaceous and
plumulaceous feathers); and
their growth and loss (e.g.,
colour morph...
-
carbonized traces on the
lower arm,
indicating the
former presence of
pennaceous feather shafts, and a
juvenile with
impressions of feathers,
which were...
- flight, contour, down, semiplumes, filoplumes, and
bristle feathers.
Pennaceous feathers are
relatively stiff and flat; the
flight and
contour feathers...
- Down
feathers lack the
interlocking barbules of
pennaceous feathers,
making them very soft and fluffy....
