Disjunct: with head, thorax and abdomen separated by constrictions.
Endothorax: the internal framework or processes of the thorax.
Pleural pieces: the lateral sclerites of the thorax; see pleura.
Proeminent: said of the head when it is horizontal and does not form an angle with the thorax.
There is no sign of a future division into thorax and abdomen.
The muscular membrane ...