The "waist," or midsection, between the abdomen and thorax, is broad in Symphyta.
Males have white tufts on their thoraxes and broad white band above the bases of the legs, and these features are less conspicuous in females.
Thorax longer than broad.
Skeletal radiographs showed a small thorax with short, broad, anteriorly expanded ribs, an abnormal pelvic configuration with bilateral ileal flaring and short long bones with wide metaphyses.
Skeletal radiographs showed a small, narrow thorax with short, broad ribs, a typical trident appearance of the acetabular margins and apparently normal bones of hand and arm.
In this species, the queen thoracic morphology is highly divergent having a much reduced T1 (as is characteristic of claustral queens) and an unusually broad neck on a very bulky thorax (even in relation to other claustral queens, which do not have as bulky a thorax).
The average thorax temperature varied in a broad range (Tth = 29.3 35.7°C, mean values per flower).
Skeletal radiographs showed a small, narrow thorax, brachydactyly of the fingers, short and broad diaphyses, and wide metaphyses of the arms and legs, and short iliac bones with spiky protrusions.
The thoracic region of buprestids is flat and broad; the head is dark and retracted in the thorax; and the mandibles are short and stout.
Remains of the rib cage of Au. sediba are described by Schmid et al. and reveal a mediolaterally narrow upper thorax like that of the large-bodied apes and unlike the broad cylindrical chest seen in humans.
