Insertion of stomodeal valve at the mesenteron, as in
Fig. 4a. Mesenteric tongue with the distal portion enlarged
and oval, situated at the dilated portion of P1
and connected to the mesenteron by a filiform tissue
(Fig. 1b, arrow). Malpighian tubules united at the attachment,
without ampulla (Fig. 4b). P1 globose and
very strangled at the proximal portion (Fig. 7a). Enteric
valve completely ornamented with single triangular
spines, these spines more numerous and larger on the
ridges than on the remaining surfaces (Figs 8, 9). P3a
globose, the proximal part narrowed as a bottleneck
(Fig. 1c, arrow). Isthmus indistinct. P4 with constant
diameter.