Tanysphyrus ater Blatchley, 1928
It is assumed that the larva bores in the thallus; pupation presumably in the mud at the shore.
distribution within Europe
Ricciocarpos natans might not be the only host plant; Reimann did not find the plant associated with his observation of the beetle.
Tanysphyrus makolskii Smreczynski, 1957.
Dieckmann (1983a), Duff (2014a), Reimann (2012a), Rheinheimer & Hassler (2010a), Yunakov, Nazarenko, Filimonov & Volovnik (2018a).