Theropod dinosaurs are seen to exhibit too many terrestrial and cursorial adaptations to be avian precursors. |
|
These rabbit-sized animals were among the most cursorial animals of their time, and may have been capable of rabbit-like leaping. |
|
If we figure out that the probable ancestor of a flying group was a bipedal cursorial form, then flight likely evolved from the ground up. |
|
However, the transition from cursorial to aerial locomotion and maneuvering was not as simple as growing large wings. |
|
It has a heavy skull and a massive neck, and it is also by far the shortest-legged and least cursorial canid. |
|
They are highly adapted for cursorial life, their offspring are vulnerable to predation, and adequate den sites are limited. |
|
Ostrom introduced the cursorial predator hypothesis of the origin of avian flight. |
|
Troodontids, judging from their cranial anatomy and cursorial adaptations, were likely agile, fast carnivores with acute senses. |
|
By all three criteria, the skeleton of Caudipteryx falls into the domain of flightless birds rather than the space of cursorial dinosaurs. |
|
Mammals inhabit diverse habitats, radiation of specialized groups such as bats, whales, cursorial mammals, hominoids. |
|
Both species live in early successional habitats and are often the two most abundant cursorial spiders in agricultural systems of the eastern and central United States. |
|
However, whether these elements belong to the wing or hindlimb can reflect the ecology of the living species, i.e., strong fliers versus cursorial or aquatic forms. |
|
Thus, species that are strong fliers with robust wing elements leave bone assemblages richer in forelimb elements than species that tend to be more cursorial. |
|
For example, mass regulation may be important only to flying, climbing, and cursorial animals, while avoidance will not be an option for any sessile or dormant animal. |
|
The Yixian dinosaurs were cursorial, bipedal, and not capable of flight. |
|
Their decline accelerated during the Oligocene and coincided with the rise of another group of large herbivorous and cursorial mammals, the artiodactyls. |
|
Dromaeosaurs were all bipedal, fairly cursorial, and terrestrial. |
|
To facilitate cursorial, or running, habits, flexion is limited to one plane. |
|
The Equidae are highly specialized for a cursorial, herbivorous mode of life. |
|
The traditional cursorial predator hypothesis suggests that the ancestors of birds were active ground-dwelling animals that used their arms in predation. |
|
|
There is, however, no evidence of habitat segregation among nocturnal, congeneric, terrestrial cursorial spiders. |
|
Loss of the clavicle from the shoulder girdle, reduction in the number of toes, and modifications of tarsal and carpal bones are typical correlates of cursorial locomotion. |
|
A microcomputer-based timer and data acquisition device for measuring sprint speed and acceleration in cursorial animals. |
|
Formerly, some authorities argued that these birds and the penguins arose independently from cursorial reptiles, but it is now generally agreed that all of them passed through a flying stage in the course of their evolution. |
|
Mammals modified for running are termed cursorial. |
|
Unlike most cursorial spiders, which use spaces under rocks only as temporary shelters, a variety of thomisid species spend their entire life span here. |
|
He bought the gelding's grand-dam Roller Bird, who was a well-bred Holliday mare by Ribocco out of Park Hill Stakes winner Cursorial. |
|