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pectoral girdle
noun
- (in vertebrates) a bony or cartilaginous arch supporting the forelimbs.
- Also called shoulder girdle. (in humans) the bony arch formed by the clavicles, or collarbones, and scapulas, or shoulder blades.
pectoral girdle
noun
- a skeletal support to which the front or upper limbs of a vertebrate are attached
Word History and Origins
Origin of pectoral girdle1
Example Sentences
Fast forward 100 million years, and fish called placoderms swam the seas, with jaws and a primitive “shoulder” or pectoral girdle supporting paired front fins.
They also used measurements of mosasaurs' pectoral girdles from other studies to come up with their hypothesis.
In ray-finned fish, such as catfish, the pectoral girdle is directly attached to the skull and retracts when suction feeding occurs.
For example, "the bones in the pectoral girdle — the bones that support the fins — changed their shape," she says.
Apparently, then, there is not sufficient reason to infer that this Jurassic frog had a pectoral girdle comparable with the modern firmisternal type.
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