- the
alula evolved twice, or it did so more than 130
million years ago.
Alular digit homology Bird
flight Leading edge slot, the man-made
equivalent on...
- some
guans (Crax) and
stone curlews (Burhinus) use a bony **** on the
alular metacarpal to
punch and
hammer opponents. The
jacanas Actophilornis and...
- birds, but a
particular foramen (or opening)
between a
metacarpal and the
alular is
otherwise only
known from
flightless birds, such as some ratites, penguins...
- subspecies, they
possess approximately 50–60 tail feathers, 16 primaries, 4
alular, and 20–23
secondary feathers. The wing and tail
feathers have
evolved to...
- maneuvers. They have 50–60 tail feathers, and
their wings have 16 primary, four
alular, and 20–23
secondary feathers. The
common ostrich's
sternum is flat, lacking...
-
crest large and not perforated;
minor metacarpal markedly bowed caudally;
alular digit terminating at the
level of the
distal end of
major metacarpal; and...
-
enantiornithean birds. The
alular and
major digits both bear a
large ungual phalanx and the
minor one
bears two phalanx. Also the
alular digit extends until...
- are
reliant on
their parents for food.
alula Also, **** wing;
alular digit;
alular quills. A small, freely-moving
projection on the
anterior edge of...
-
holotype carpometacarpus of the
Mauritius sheldgoose has a
strongly projecting alular metacarpal (the hand bone to
which the
alula feathers attach)
which ends...
- The
carpometacarpus is
proportionally much
longer with a
process on the
alular metacarpal that is not
curved at its
upper part,
while the ectepicondylar...
