Ehrenberg, 1831
Monostiliferous hoplonemerteans with usually two pairs of transverse cephalic furrows; rhynchocoel extends to, or almost to, the posterior end of the body, with the wall composed of separate circular and longitudinal muscle layers; the proboscis is generally well developed; the dermis development is variably thick or thin; the body wall musculature is generally well developed, with or without a diagonal muscle layer between the circular and longitudinal muscles; the longitudinal muscle stratum in the anterior body regions is either a single layer or, less commonly, divided into two in some species by parenchymatous wedge; dorsoventral muscles are present but usually few in number and restricted to the intestinal regions; nervous system with neither neurochords nor neurochord cells; frontal organ present; cephalic glands usually few in number and small; cerebral sensory organs anterior to cerebral ganglia, variably developed according to species; blood vascular system with three longitudinal vessels, the mid-dorsal vessel with a single vascular plug; excretory system positioned between the rear of the cerebral ganglia and the foregut; intestinal caecum present, with a pair of anterior diverticula as well as lateral pouches; eyes normally numerous and distributed in groups, occasionally few or none; sexes separate.
(Amphiporus-transverse section)
(Amphiporus-anterior end)
Source: Gibson, 1982.
The following species of this genus occur in the region:
Amphiporus bioculatus
Amphiporus cordiceps
Amphiporus hastatus
Amphiporus lactifloreus