12 Questions
What type of bird exhibits a robust D- III, foreshortened distal phalanges with shorter, subequally sized lateral digits?
Ratites
Which group of animals shows a trend where D-IV becomes especially elongated, distal non-ungual phalanges are more elongated, and D-II becomes hyperextensible?
Deinonychosauria
What benefit does elongation of the metatarsus provide for cursorial birds?
Increased stride length
Why do owls have greater force production compared to accipitrids?
Short robust metatarsus
Which group of birds has an elongate metatarsus that grants them better ability to snatch prey?
Accipitrids
What is the main difference in the pedal digits between cursorially adapted dinosaur taxa and basal Avialae?
Elongated D-IV
What type of metatarsus is present in basal troodontids?
Elongate
Which group specialized towards grasping strength at the expense of speed?
Derived dromaeosaurids
What type of interphalangeal articulations are indicative of low torsional stresses?
Non-ginglymoid
In which group are all interphalangeal articulations strongly ginglymoid?
Extant birds of prey
What type of interphalangeal articulations are present in derived troodontids suggesting adaptation for torsional resistance?
Ginglymoid
What is the main weight-bearing digit in cursorial ratites and ornithomimids?
D-III
Explore the relative proportions of the feet in cursorial and grasping birds and dinosaurs. Learn about the differences in the morphology of pedal digits between different taxa, such as ratites, Ornithomimidae, Avimimus, Deinonychosauria, and Archaeopteryx.
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