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The thin tibia and fibula (lower leg bones) of aphanosaurs do not possess unique traits to the same extent as the femur. However, they are also shorter than the femur. These proportions are rare among early avemetatarsalians, but more common among pseudosuchians and non-archosaur archosauriformes.
The name Pseudosuchia was originally given to a group of superficially crocodile-like prehistoric reptiles from the Triassic period, but fell out of use in the late 20th century, especially after the name Crurotarsi was established in 1990 to label the clade (evolutionary grouping) of archosaurs encompassing most reptiles previously identified as pseudosuchians.
Poposauroidea was a diverse group of pseudosuchians, containing genera with many different ecological adaptations. Some (Poposaurus and shuvosaurids) were short-armed bipeds, while others (ctenosauriscids and Lotosaurus) were robust quadrupeds with elongated neural spines, creating a 'sail' like that of certain "pelycosaurs" (like Dimetrodon) and spinosaurids.
This removes the legs, the genitalia (internal and external), urinary system, pelvic bones, anus, and rectum. [ 1 ] [ 2 ] It is a major procedure recommended only as a last resort for people with severe and potentially fatal illnesses such as osteomyelitis , tumors , severe traumas and intractable decubiti in, or around, the pelvis . [ 3 ]
The hypothesized leg musculature of P. gracilis, with leg bones (top), superficial muscles (middle), and deep muscles (bottom). When M. G. Mehl first named Poposaurus in 1915, he described it as "a well-muscled creature light in weight, possibly bipedal in gait occasionally, and most assuredly swift in movement."
The earliest lineages of Crocodylomorpha are placed into the paraphyletic "Sphenosuchia", which are characterized by slender bodies with elongate legs. The oldest known crocodylomorph is Trialestes , known from the Late Triassic (Carnian-Norian) of Argentina, around 231–225 million years ago, [ 6 ] the last groups of "sphenosuchians ...
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Popliteal bypass surgery, more commonly known as femoropopliteal bypass (FPB, fem-pop, etc.) or more generally as lower extremity bypass surgery, is a surgical procedure used to treat diseased leg arteries above or below the knee. [1]