Systematic Paleontology
Class: Cephalopoda
Subclass: Nautiloidea
Order: Barrandeocerida
Family: Lechritrochoceratidae
The Lechritrochoceratidae is a family of middle and upper Silurian barrandeocerids, shells of which are dextral costate torticones with cylindrical siphuncles offset ventrally from the center. It Includes Lechritrochoceras, Catyrephoceras, Leurotrochoceras, Systrochoceras, and Trochodictyceras, all from the middle Silurian, as well as Peismoceras from both the middle and upper Silurian.