Taxon - Links and literature
The Interim Register of Marine and Nonmarine Genera [111263]
Rees, T. (compiler): The Interim Register of Marine and Nonmarine Genera [https://www.irmng.org] [as Orthothecidae Sysoiev, 1957]
Data retrieved on: 22 December 2019
Marek L. (1966): New hyolithid genera from the Ordovician of Bohemia, Časopis Národního muzea, Oddíl přírodovědný 135(2), 89–92 [as Orthothecidae Sysoiev, 1958]