Bradynectes

Macrostomidae
An adult Antromacrostomum armatum
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Turbellaria
Order:	Macrostomida
Family:	Macrostomidae
Genera
Antromacrostomum Archimacrostomum Axia Bradburia Bradynectes Dunwichia Inframacrostomum Macrostomum Myozona Omalostomum Promacrostomum Protomacrostomum Psammomacrostomum Siccomacrostomum

The Macrostomidae are a family of small basal free-living flatworms (Macrostomida, Turbellaria, Platyhelminthes), and members of the marine, brackish, freshwater meiobenthos. There are currently about 180 named species in this family.

...
Wikipedia