endosternum

The endosternum is a continuous structure that can be regionalized as follows (

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Thus, these two muscles act antagonistically, possibly bringing about indirect head roll via rotation of the propectus-endosternum unit.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Overlying the sternal plates of the propectuses is the endosternum.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Ventrally, the basal surface of the endosternum forms part of the protective exoskeleton, interfacing anteriorly with the propectuses, and posteriorly with the forelegs.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Section was taken in a transverse plane, at a level near the anterior margin of the endosternum.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

The last of the indirect neck muscles connects the base of the endosternum to the supraneural bridge of the mesothoracic endosternum, and is thus a retractor of the propectus

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Muscle 53b connects the anterolateral rims of the coxae, running adjacent to 53a, but separated by a sheath for most of its length before terminating on the lateral extremes of the supraneural bridge of the endosternum (not the propectus as for 53a).

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

In reality it appears that the two propectuses are tightly coupled by a length of ligament-like tissue connecting the propectal condyle to the endosternum.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

Nine other muscles attach to the propectus, endosternum, or anterior pronotum.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010

The leg muscles of the propectus, endosternum and pronotum.

PLoS ONE Alerts: New Articles Richard P. Berry et al. 2010